Ag 101 Week 50

Leaves Never Lie

 

Neither does my tongue. Here’s the story.

I’ve been going to acupuncture every week now for the past month. Every week Brian the acupuncturists asks to see my tongue. He reads it like I read leaves when I’m on a farm or in a greenhouse.

For the past two weeks, I have been getting a gallon of what is hands down the best ice cream I have ever had since the time I was in doing farm visits around the O’Brien, Florida area. The ice cream I had at one farm would blow your mind. I could be considered somewhat of an ice cream snob.

Every time I’m standing in the kitchen eating some while thinking everyone else is preoccupied, my daughter inevitably comes around the corner and says,” Brian’s going to ask to see your tongue.” I respond with, “I know and I’ll tell him the truth.”

This week I go to acupuncture, he asks to see my tongue, it has a greasy film, he gives me a look, and I confess to the fact I’ve been eating the best ice cream found in the state of Pennsylvania every day for the past several weeks. We have a conversation much as I would have with a grower. I leave realizing the error of my ways and how my ice cream eating is only holding back my progress.

When I do farm or greenhouse visits, I’m often looking at leaves more than I’m listening to the farmer. Well, I’m doing both sometimes simultaneously. All because much like my tongue, leaves will always tell me exactly what I need to know. They are the first indicator of everything from management decisions to fertilizer and amendment applications or the lack thereof. It all goes back to week 7, Thinking Like an Agronomist. Being observant and asking questions to put the pieces of the puzzle together

https://www.theaccidentalagronomist.com/news/2018/2/7/ag-101-week-7

Leaf appearance is also a determining factor for deciding the necessity of further analysis such as sap, tissue, pathology or entomology testing.

You can google resources for all types of leaf issues. The following are the best I found and I still use them.

 Image courtesy of Google Images

Image courtesy of Google Images

 Image courtesy of Google Images

Image courtesy of Google Images

An app I’ve used is called Plantix.

 Plantix for Android

Plantix for Android

You can pick up to four crops at a time, submit a post for others to comment on and use pictures from your phone. The library is fairly extensive for some common and uncommon issues.

The next time your walking around your fields or greenhouses look at the leaves, they never lie.

Ag 101 Week 49

Finding Balance

 

I’ve spent the majority of this week starting to organize our house and get things together in one central location to be cleaned out.

After years of accumulating, collecting, and accepting the well-meaning ‘donations’ from family members I’ve made the decision that I’m over it. If we haven’t used it within the last several months, we never will, and it’s out of here.

All the effort and time spent towards the great clean out and maintaining our regular schedule has not left much time for coming up with a topic let alone writing about it.

However, early this morning, after my husband left for work and I started thinking about what I needed to do today, it dawned on me what I could write…Finding Balance. It’s what I’ve been working towards all week. Finding balance between us and all the stuff we live with.

Everything we do is about finding balance. Everything from health, food, money, relationships, work, kids, how much stuff we have in our homes, and even agronomy is about balance.

I wrote a post several months back titled “Soil Doesn’t Follow Trends.”

https://www.theaccidentalagronomist.com/news/2018/2/15/soil-doesnt-follow-trends-markets-do

The last sentence of the post reads,

“Start paying attention to the soil they (the farmers) have and work with it to apply science and technology in practical ways to harness its natural abilities.”

Finding balance in agronomy is taking the latest in science and technology and applying it practically to meet your soils and plants needs while being sustainable practices you can do. These things do not necessarily mean keeping up with the latest catch-phrases, hashtags, or trends that make their way into agriculture.

One aspect of balance in agronomy is what I do when I start working with a farmer to develop a soil and crop fertility plan. I’m often asked what method or school of thought I use to balance soil nutrients.

I do not prescribe to one philosophy or method for developing a soil fertility plan. I take each farm, farmer, soil type, and crops being grown into consideration. I keep up with what the latest and greatest is and who the current rocks stars are, but just as I feel soil doesn’t follow trends, nor do I.

What I have done is spent years listening to and learning from all different types of agronomists and ag-related professionals from across the industry.

I have several of my favorite resources listed at the following link

https://www.theaccidentalagronomist.com/resources/

Here are a few more that I use frequently-

Ball Redbook Vol 1 Greenhouse & Equipment Vol 2 Crop production

The Ideal Soil v2.0 By Michael Astera

A&L Laboratories Agronomy Handbook

Crop Rotation on Organic Farms edited by Charles L. Mohler & Sue Ellen Johnson

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Ag 101 Week 48

Buy One Get One Free

 

This post isn’t about a great deal on fertilizer or an early order discount program. I happen to be writing it on Black Friday, and that was the best title I could come up with.

What we’re talking about are amendments and fertilizers that do double duty.  The ones you get more bang for your buck out of. The ones that you could use by themselves or with others.

In addition to that topic, everything I’ve been talking about over the past year is all starting to come together.

In week 2 – Soil Health vs. Soil Fertility I started laying the groundwork for what I saw as a need in the agricultural industry. Farmers need to have an understanding of basic agronomic principles to be and remain a sustainable and financially viable business while utilizing the incredible resources offered to them by mother nature herself. 

https://www.theaccidentalagronomist.com/news/2018/1/5/ag-101-week-2

I followed that up with a post about the difference between amending and fertilizing in week 5

https://www.theaccidentalagronomist.com/news/2018/1/21/ag-101-week-5

In week 11 I discussed the similarities between fertilizer blends and pajamas – one size does not fit all. In all seriousness, the fact that fertilizer blends can contain fillers is the real story. A farmer or gardener needs to be knowledgeable of how fertilizer fillers are capable of altering soil chemistry.   

 https://www.theaccidentalagronomist.com/news/2018/3/3/fertilizers-and-pajamas

Moreover, we’ve talked about the need to understand how, when, what and where to fertilizing in weeks 6 & 10

https://www.theaccidentalagronomist.com/news/2018/2/5/ag-101-week-6

https://www.theaccidentalagronomist.com/news/2018/2/25/ag-101-week-10

So, what are some amendments and fertilizers that do double duty-

Fish/Crab/Shrimp Meal-

Typical analysis ranges from 5-30%N 4-6%P

Typically, fish varies from 5-9%N depending on whether it is a meal, powder or liquid

Crab and Shrimp range from 10-30%N with 11-18%Ca depending on the shell to meat ratio

Crab makes an excellent addition to a fertilizer blend for the extra calcium, and the addition on an enzyme called chitin that has been shown to help control nematodes in the soil. This also makes it an excellent fertilizer for tomatoes.

Bone Meal-

A typical analysis is 3-4%N

It is also a good source of phosphorus at 15-27% and calcium.

When mixed with a calcium source like aragonite, it supplies immediately available and season-long calcium.

Soybean Meal-

A standard analysis is 6-7%N ~2%P

It’s a good source for full season nitrogen supply as well as phosphorus

Soybean meal has been shown to burn new seedlings and reduce germination rates potentially. Care should be exercised when timing the application

Alfalfa and Cottonseed Meal -

Typical Analysis 1-2% K 2-3%P Slow to medium release

These are an all-around season long supplier of not only nitrogen, a small fraction of phosphorus, and potassium as well.

Alfalfa and cottonseed meal can be cost prohibitive in an organic system. However, if used effectively the benefits can out weight the price.

Benefits of alfalfa meal-

-Helps build organic matter

-If used as a cover crop it fixes nitrogen

-Alfalfa adds essential nutrients such as calcium, phosphorus, potassium, boron, iron, zinc, and magnesium

-Alfalfa feeds soil microbes

-It can be a compost stimulator

Some advantages to using cottonseed meal-

-Cottonseed meal is an excellent option for acid-loving plants like blueberries and roses. It’s a fertilizer, soil conditioner, and acidifier.

Both alfalfa and cottonseed meal both have growth stimulating properties that aid in overall plant health.

Sol-Po-Mag-

Typical analysis 22%K 22%Sulfur 11%Mg Medium to fast availability.

Much like SOP, it is relatively soluble depending on particle size.

SOP covers sulfate, potassium, and magnesium deficiencies at once

Kelp-

Typical analysis 4-13%K Slow to medium release

Kelp can be used as a liquid concentrate, powder, or meal. It can be attributed for being part of all five of the previously listed roles K plays in plant health. If I could only recommend one product, kelp would be it. That being said you still need to use it judiciously as not to decrease its efficacy.

Greensand-

Typical analysis ~5% K Prolonged release

Greensand is a good source of potassium, trace minerals, and soil conditioning properties. When I got into organic agriculture and was working for a fertilizer company, I had never heard of anything like greensand. They would explain greensand as being magic. It could loosen tight soils and tighten loose soils. Not being satisfied with the supernatural explanation, I came to learn the power of greensand is in the structure. It has a unique layered structure unlike any other clay giving it the ability to correct a variety of soil structure issues. Hands down I would use greensand before any others. I often recommend a 50/50 mix of greensand and kelp.

Liming products-

I talk at length about liming materials in the following post

https://www.theaccidentalagronomist.com/news/2018/11/4/ag-101-week-45

Another critical point to remember is these materials are used as fillers in fertilizer blends to help products flow better or add to the volume of product for packaging. Just as with other chemistries listed in the NPK value, these interact with the soil and alter the chemistry as previously mentioned.

Manures-

Raw manure is the most nutrient dense. The longer it composts it losses its nutrient value. Over applying it, can lead to not only environmental issues also pest and disease challenges.

Typical analysis ranges depending on the manure, however, if used judiciously from a trusted source it can be a great building block for any fertility program adding not only organic matter but nutrients as well.

 Vinegar-

Vinegar is to a farmer as a gym sock and paperclip are to MacGyver. You can do anything with it from kill weeds, clean and disinfect tools, use it as an extract for kelp, greensand or aragonite, and use it to mitigate pH issues in fertigation systems.

For even more ideas go to week 18

https://www.theaccidentalagronomist.com/news/2018/4/29/ag-101-week-18

Ag 101 Week 47

Trace Minerals

 

Would you believe after this post there are only five weeks left in the Ag 101 52 Weeks of Agronomy Series!

Since I’ve started writing, a lot has happened not only professionally but personally as well. Last year I came on the speaking scene pretty strong presenting at four fairly significant conferences. This year I have had seven proposals rejected for silly reasons like they didn’t like my title or they felt I was redundant. Funny thing is, I said the title was not set in stone and I had never spoken at that particular conference before.  I’ve been called everything from a charlatan to a rock star. It has been brought to my attention that I should ask my family to purchase Grammarly for me as a Christmas gift. Even through all of that, I gained readers all over the world, doubled my email list, recorded a couple podcasts, presented for gardening clubs, and kept writing. Last but not least, I can now say I have clients in six states, and the consulting side of my business is steadily growing.

I’ve also gained a new appreciation for my health and hope to keep up with the small but necessary steps to get past some challenges I’ve had. I have completely given up coffee, alcohol, refined sugars, and processed foods along with some other changes without harming anyone in the process.

Moreover, that leads me to this week’s topic.

Trace Minerals- Small but necessary elements that are critical for plant health.

Roles trace minerals play in plant health-

The amount of trace minerals in soil is related to the parent material and the amending and fertilizing history

Trace minerals are often referred to as micronutrients because they are required in relatively small amounts by plants and the people and animals consuming them

It has been up to debate has how nutrients such as sulfur are viewed. For the sake of this post, I’m going to cover it.

Trace minerals have been linked to the following functions

Sulfur (S) – Sulfur is needed to manufacture chlorophyll and the synthesis of nitrogen. It also encourages overall plant growth and vigor.

Boron (B) – Boron aids in cellular growth and helps to regulate the uptake of nutrients. It is essential for water absorption and the translocation of sugars. Boron and zinc have been linked to aiding in the vegetative and reproductive stages of berry development.

Copper (Cu) – Copper works to help plants metabolize nitrogen and is essential for iron utilization. It has been linked to bacterial and fungal suppression as well.

Iron (Fe) – Iron assists in the creation of chlorophyll and protein synthesis

Manganese (Mn) - Manganese is known as an activator for several enzymes responsible for plant metabolism as well as nitrogen transformation. 

Molybdenum (Mo) – Molybdenum plays several critical roles in a plants ability to metabolize nitrogen.

Zinc (Zn) – Zinc is required in seed production. It has also been linked to aiding the vegetative and reproductive phases in berry development.

Potential sources of organic inputs for trace minerals

Kelp-

Kelp can be used as a liquid concentrate, powder, or meal. It is a powerhouse of trace minerals and plant growth stimulating hormones. If I were reduced to recommending one product kelp would be it. That being said you still need to use it judiciously as not to decrease its efficacy

Greensand-

An excellent source of potassium and trace minerals along with built-in soil conditioning properties.

Azomite-

Azomite is a hydrated sodium calcium aluminosilicate broad-spectrum soil remineralizing product

Aragonite-

Raw aragonite brings with is biology from the sea, acting as a built-in inoculant as well as containing several trace minerals

Redmond Salt-

Redmond salt is an unrefined product containing more than 60 naturally occurring minerals

Chelated liquid forms-

This group of products can be mineral specific. The most common that I have worked with are Baicor Liquids. Care should be taken that your plants show signs of apparent deficiencies through tissue testing before applying to determine necessity and rates

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Ag 101 Week 46

Efficacy

 

 ef·fi·ca·cy

/ˈefəkəsē/

noun

1.     the ability to produce a desired or intended result.

"there is little information on the efficacy of this treatment"

synonyms:

effectiveness, success, productiveness, potency, power;

Before moving on to talking about trace minerals and sulfur, I wanted to discuss a word I find myself using often. I even found myself having a conversation about this topic with my acupuncturist this week.

I arrived for my appointment, and he noticed I have a cold. He told me before we could move forward working on my leg and arm; we would need to treat the cold, so it doesn’t go any deeper into my system. That alone is another topic for a post, but I’ll save it for later.

As we were discussing some options for herbs I could take, he spoke about a common over the counter remedy that contains Chinese herbs for colds. He mentioned the reason why people do not see the results they want is twofold – timing and overuse. As I was sitting there listening to him, I thought, “Umm, that’s much like issues some growers experience.”

To realize somethings full efficacy; it’s ability to produce a desired or intended result, you need to use the right source, use the right rate, have the right timing, and in the case of fertilizer, amendments, hebicides, and pesticides have the right placement.

A chemistries efficacy becomes even more critical in the case of trace minerals because they are required in such small amounts.

I’ve spoken at length about the right rate, timing, and placement in the following two posts

https://www.theaccidentalagronomist.com/news/2018/2/5/ag-101-week-6

https://www.theaccidentalagronomist.com/news/2018/2/25/ag-101-week-10

Since week 41 I’ve talked at length about the right sources

The best example of chemistry losing its efficacy is in the case of herbicides. We have heard year after year of more weeds becoming herbicide resistant and even developing into superweeds. More and more I am hearing about common chemistries on the organic side of agriculture losing their efficacy as well. Things such as copper, Bt products, and even my favorite kelp are having to be applied at higher and higher rates to see any results.

So, how does a farmer avoid overusing inputs-

1.     If possible, use cultural practices such as mowing, minimal tillage, removing debris, etc.

2.     Identify the problem correctly, whether it is a pest, disease, or nutrient related

3.     Use the proper chemistry for the issue

4.     Rotate with several chemistries that work synergistically with each other

5.     Most importantly do not use more than the recommended amount of the chemistry

6.     If chemistries are needed, follow the 4R Principles laid out in the previous weeks 6 & 10 links

Remember the adage, “If a little is good, more must be better.” Isn’t always the case.

Ag 101 Week 45

Calcium & Magnesium

 Image courtesy of Google Images

Image courtesy of Google Images

One of the fascinating aspects of soil nutrient balancing is the interactions each mineral as within the soil matrix and other nutrients. The Mulder Chart is an excellent illustration of that. It also shows the certain dominance cations like calcium and magnesium have over others.

If you recall in week 39, we discussed pH and how you use pH to adjust cations and anions. The relationships they have with each other need to be taken into consideration as well as the roles they play in soil and plant health.

 https://www.theaccidentalagronomist.com/news/2018/9/23/ag-101-week-39

Calcium and magnesium are two of the major players when balancing soil nutrients. Their ratio is one of the most talked about in the world of soil nutrient balancing. Whether you are of the school backing the ideal 8:1, or some variation of, it can’t be denied the importance of both to not only plant health but soil health as well.

If you recall in week 29, we discussed cation exchange capacity (CEC), and I use two side by side fields to illustrate the power of calcium

https://www.theaccidentalagronomist.com/news/2018/7/16/ag-101-week-29

It’s calcium’s critical role that brings it front and center in not only soil but plant health as well.

Here are nine critical roles it plays

1.     Calcium is a flocculating agent that helps stabilize clay and organic matter leading to aggregate stability.

Calcium and to some degree magnesium, help chemically bind clay and organic matter helping with better drainage and erosion control by making the soil more stable.

2.     Proper moisture balance, created by aggregate stability in soil leads to a healthier microbial environment

3.     Calcium can neutralize excessive soil conditions, dependent on the source, leading to more robust root growth

4.     Reduce weed pressure

5.     Reduce leaching of other nutrients

6.     Calcium has also been likened to a nutrient filter whereas it regulates the movement and availability of such nutrients’ as sodium, phosphorus, iron, aluminum, and boron

Specifically, in plants

7.     Calcium is responsible for proper cell division and cell wall development.

8.     It plays a role in nitrate uptake and metabolism

9.     It represents a role in enzyme metabolism

Calcium is not mobile on its own in the soil or the plant, leading to the need to be continually supplied. It is transported through the xylem in the plant and dependent on water to complete the process. This is why tomato blossom end rot is not a calcium issue as much as it is an irrigation issue. Without a consistent water supply, calcium cannot move into the plant, hence rendering it calcium deficient.

Magnesium is just as vital to a plants’ health. Several roles it plays are-

1.     It is the central element in the chlorophyll molecule

2.     Carries phosphorus into the plant

3.     It activates and is a component of plant enzymes

4.     Aids in plant oil and fat formation

5.     Helps control nutrient uptake by the plant

6.     Aids in nitrogen fixation

One of the main concerns with magnesium in forage crops is grass tetany. It is a metabolic disease when an animal is deficient in magnesium.

Factors that lead to it are-

1.     Low levels of magnesium in the soil

2.     Soils higher in potassium

3.     Long periods of cool or cloudy weather in spring

4.     Poor soil drainage

5.     Moving animals from indoor to outdoor feeding

Magnesium can be often overlooked due to the fact it does not always translate to a higher yielding crop, just a more nutrient dense one.

Potential organic sources of calcium and magnesium

Aragonite- Typical analysis is 33-40% calcium

Aragonite is a readily available calcium source. It can be applied in the spring and be available that growing season. It also has a far greater liming effect than once realized, while providing trace minerals and biology to the soil. Raw aragonite brings with is biology from the sea, acting as a built in inocculant.

High Cal Lime- Typical analysis is 38% available calcium

Best used when there are no need for magnesium. Sometimes referred to calcitic limestone

Dolomitic Lime-Typical analysis is ~21% calcium ~11% magnesium

Use when both calcium carbonate and magnesium carbonate are needed

Oyster Shell- Typical analysis can be as high as 96% calcium carbonate

Used as a source of calcium and trace minerals

Wood Ash- Typical analysis is ~32% calcium oxide 3-7% Magnesium

Wood Ash is considered a liming material, supplying about 50% calcium carbonate. Care should be exercised that it is not over-applied due to its rapid reactive nature

Gypsum- Typical analysis is 18-23% calcium 18-29% sulfur

Gypsum is used to correct alkaline and sodic soils. It can improve the structure of heavy clay soil and supply calcium and sulfur when a pH adjustment is not necessary. Can be used to add calcium if magnesium is not needed and soil tests show lower sulfur. Does not remediate sodium issues alone, irrigation is still needed

Bone Char- Typical analysis is ~25% calcium

Has varying amounts of NPK, but is also high in calcium. Bone char has more surface area to bone meal making it more reactive especially at higher temperatures

Crab Meal- Typical analysis is 11-18%

Crab meal is a slow-medium release nitrogen source. It can also be a calcium source depending on how much shell is mixed in. Crab meal also contains an enzyme chitosan, which helps plants build a robust immune system, increases germination rates, and repels parasitic insects and nematodes. Due to the expense, it is often used in fertilizer blends more than a stand-alone.

 Epsom Salt (Magnesium Sulfate)- Typical analysis is 10% magnesium 18% sulfur

Epsom salts are a good source of magnesium and sulfur. Can be used as a dry application or foliar. Care should be taken when you spray so not to burn plant tissue

 Sol-Po-Mag- Typical analysis is 0-0-22 11% magnesium 22% sulfur

Sul-Po-Mag is a medium to fast release source of sulfur, potassium, and magnesium. It is also known as K-Mag or Langbeinite

 Aragonite & Epsom Salt

Aragonite & Epsom Salt

Ag 101 Week 44

Potassium – Quality vs. Quantity

Last week was not my best post. Sorry. I explained how I haven’t been feeling the best and frankly writing on a good day is hard enough for me. It’s harder yet on days where I pretty much want to go back to bed.

I’m thankful to be in a position in life I can set my own pace, make my schedule, and I have supportive friends, family, clients, and followers.

According to the doctor, I’m not dying. I needed a different medication to reduce the inflammation and eight weeks of therapy. I’ve also decided to make a few more modifications to my diet to keep improving my health and help elevate the grouchy disposition I have had lately.  I’m giving up coffee; it might get worse before it gets better.                 

Enough with the pity party, now let’s talk about potassium!

I have to admit, potassium (K) is one of my favorite nutrients to talk about. I’m pretty sure it’s because it is a quality vs. quantity factor. I often refer to it as the dessert part of a meal for your plants, and let’s face it that’s my favorite part of the meal. Rely on nitrogen and phosphorus to push yields, but hand it over to potassium to develop kernels, fruit, and blooms. To top off my love affair with it, some of my favorite organic inputs are sources of potassium.

One of the best resources I have that talks about potassium is the Soil fertility Manual published by the Potash & Phosphate Institute of Canada.  I find it to be a valuable resource for soil fertility in general as well.

Here are a few things potassium plays a role in-

1.      Helps ionic balance in plant cells

Ionic balance is the relationship between cations and anions. Which leads to turgor, known as the pressure within the cell wall of a plant that keeps it from wilting.

2.      Helps a plant to overcome diseases

3.      Help a plant to over winter

4.      Helps with optimizing enzymatic systems that regulate plant growth

5.      Helps develop fruit quality, size, taste, color, and storage length

Potassium can be a difficult nutrient to manage in a sense it is not particularly mobile in the soil, except sandy or high organic matter soils. It also has an interesting relationship with calcium and magnesium making it a nutrient of particular concern in forages. Too much potassium can slow down bacteria develop in the gut of a rumen. Too little can lead to fertility issues. My dad is the animal nutritionist, and I’m the agronomist. We have a long-standing conversation about how to balance potassium for optimal plant health vs. animal health. He politely reminds me agronomist are notorious for being cow killers. Since certain crops like alfalfa are considered luxury consumers of K, meaning they will utilize considerably more than they need, much like when I eat cheesecake, the plant will take up as much as you put down. This will produce a great crop but not necessarily healthy for your animals. I can also hear him repeating, “ Alfalfa, Medicago sativa L., is the queen of the farm. Treat her well and she’ll treat you well.”

Thank you, Dad, for keeping me in check.

Potassium exists in three forms in the soil-

Unavailable- This is the form found in the mineral fraction of the soil. It takes the process of weatherization to release and is therefore only available in the soils that are in regions that are well weathered. They are often depleted due to miss management.  

Slowly available- This form is fixed in layers of potassium silicate clays such as greensand. As the clay shrinks and swells during dry and wet periods the potassium is slowly released.

Available- this form is found in the soil solution held by the cation exchange capacity -the fraction of the soil made up of organic matter and clay- but can only account for about 10lbs/acre or less of available K to the plant. Definitely not sufficient for a growing season.

What are some organic sources for potassium-

Manures- Typical analysis 1-3% Medium to rapid release

Great source especially sheep and bat guano. However, care needs to be taken that you are not over applying and causing the very issues you don’t want like disease and insect pressure.

Alfalfa, Cottonseed, and Soybean Meal- Typical Analysis 1-2% Slow to medium release

These are an all-around season long suppliers of not only nitrogen, a small fraction of phosphorus, but potassium as well.

Refer back to week 42

https://www.theaccidentalagronomist.com/news/2018/10/14/ag-101-week-42

Wood Ash- Typical analysis 3-7% Fast acting

I list this one hesitantly, however, feel it should be talked about. It can be a good addition especially to a compost pile that has time to rest. The challenge with wood ash is it is over applied and changes the chemistry of the soil quickly due to its particle size and makeup. The adage, a little goes a long way is fitting.

Sunflower Hull Ash (K Ash)- Typical analysis 34-36% K Availability dependent on mesh size and pH of soil being used in.

Sunflower hull ash is a relatively new product. Although it has some added benefits of having about 4% phosphorus and trace minerals, it should not be used in the soil the has a pH of 7 or higher. It has a pH of 8-10 making its applications limited to particular situations.

 Potassium Sulfate (SOP)- Typical analysis 50-52% Fast acting

I often have greenhouse growers run SOP at certain points of the growing season to help keep the plant producing and yielding a marketable size fruit such as tomatoes and cucumbers. It is soluble and has sulfur which can help mitigate higher pH’s that greenhouse growers are sometimes challenged with.

Granite Dust- Typical analysis 3-6% Very slow release

As mentioned earlier this is a source of potassium that takes weatherization to release the available potassium that is in the matrix of the granite.

Sul-Po-Mag (Sulfate of potash magnesia, K Mag)- Typical analysis 22%K 22%Sulfur 11%Mg Medium to fast availability

Much like SOP, it is relatively soluble depending on particle size.

High K & Low K Seaweed Shakings- Typical analysis ~27% High K, ~5% Low K

Generally used as a component in a fertilizer blends.

Kelp- Typical analysis 4-13% Slow to medium release

Kelp can be used as a liquid concentrate, powder, or meal. It can be attributed for being part of all five of the previously listed roles K plays in plant health. If I was reduced to recommending one product kelp would be it. That being said you still need to use it judiciously as to not decrease its efficacy.

Refer to week 22 & 38 for more specific uses.

https://www.theaccidentalagronomist.com/news/2018/5/27/ag-101-week-22

https://www.theaccidentalagronomist.com/news/2018/9/9/ag-101-week-38

Greensand- Typical analysis ~5% Very slow release

I could list other clay-based materials as well. However, greensand is my favorite, especially considering what it is capable of while being a good source of K and trace minerals. When I got into organic agriculture and was working for a fertilizer company, I had never heard of anything like greensand. They would explain greensand as being magic. It could loosen tight soils and tighten loose soils. Not being satisfied with the supernatural explanation, I came to learn the power of greensand is in the structure. It has a unique layered structure unlike any other clay giving it the ability to correct a variety of soil structure issues. Hands down I would use greensand before any others. I often recommend a 50/50 mix of greensand and kelp.

Refer to week 28 for a brief overview of clays

https://www.theaccidentalagronomist.com/news/2018/7/6/ag-101-week-28

 

 Greensand & Kelp

Greensand & Kelp

Ag 101 Week 43

Phosphorus

I had to have some help with this weeks’ post.  Here’s the backstory-

Since July I have had health challenges. It started with pain in my right leg and has now started in my left arm and hand. I have never liked typing; now it has just become physically painful.

I was going to ask my husband for help with typing, but he reluctantly had to go to Texas for work. So, I called a friend to see if they could help me and we ended up going to the emergency room instead. While waiting to see the doctor, she pulled out a notebook to start taking notes and being the amazing English teacher that she is, began with a Venn diagram.

I was called back before we could finish.

To make a very long story short after several visits to the doctor’s office the past few months, and a trip to the emergency room this past weekend I now have an appointment to see a specialist later this week and will hopefully have more answers, and a plan has to how to move forward.

I have had no desire to even think about this weeks’ topic let alone write about it.

However, I’ve committed to offering something every week.

I got the bright idea to finish the Venn Diagram add a few more notes and call it a day.

Not my original intention, but who doesn’t love a good Venn diagram about phosphorus!

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My only regret- Not having my friend finish it. Her handwriting is so much better than mine.

Ag 101 Week 42

Nitrogen

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Last week I said I was going to start and break down what goes into a bag of fertilizer. If you recall, I likened each component to a piston in an engine. Put the right pistons together, and you get a locomotive engine, put others together, and you get a Yugo.

You buy a bag of blended fertilizer, and you are getting a mix of nutrients that supply a plant with nitrogen, phosphorus, and potassium - NPK. In some cases, you can get some magnesium, calcium, sulfur, and trace minerals. I’m sure most of you know that already.

So, I want to go over a few questions I get; then we’ll take a look of some more commonly used components within the organic or softer chemistry area of fertilizers.

Why are the numbers, otherwise known as NPK values, so much lower in organic fertilizers than conventional?

The numbers representing NPK are a ratio of the percentage of available nutrients. The amount of the nutrient that is soluble and readily available for the plant to use. The more solvent, the higher the number and the more significant amount that the plant can uptake sooner. In the case of organic fertilizers, you have to also consider variabilities due to the fact components are naturally sourced materials, i.e., mined from clay deposits or animal by-products. Nature is not always consistent. One of the best benefits of organic fertilizers is a more extended nutrient supply over the growing season given the fact they are comprised of soluble and insoluble forms of nutrients. Given adequate moisture, biological actively, and crop type a natural fertilizer can take you through from planting to harvest. Once again, I stress it is crop specific and dependent on other management decisions. I will often suggest a split application if at all possible or fertilizing with a liquid to get through a season depending on all the variables.

Keep in mind from week 5 when fertilizing you are feeding the plant and the soil. Some are hungrier than others and at a different rate.  

 https://www.theaccidentalagronomist.com/news/2018/1/21/ag-101-week-5

What is the difference between soluble and insoluble nutrients?

A soluble form of a nutrient is readily available to the plant for immediate uptake. Insoluble nutrients are held in the soil longer and need to be converted to plant available forms by the bacteria and fungi present in the soil. Other factors determining the rate at which they become soluble are soil moisture, temperature, and pH.

 What does it take to ensure a fertility program is effective?

1.      pH management -You want to manage pH to accomplish two things

First be in a range for optimal nutrient uptake based on soil type and crop variety while staying slightly acidic to help make nutrients available through mineralization and biological activity.

2.      Irrigation management

A fertility program is only as effective as your irrigation.

3.      Good amendment & fertilizer practices

Fertilizing is strategic and should be applied at the right rate, time, location using the right source. I discussed that in weeks 6 & 10

https://www.theaccidentalagronomist.com/news/2018/2/5/ag-101-week-6

https://www.theaccidentalagronomist.com/news/2018/2/25/ag-101-week-10

You could say I’m finally getting around to talking about the fourth – the source.

Let’s talk about nitrogen-

Nitrogen is used for several functions in the plant including the production of proteins that lead to tissue development

It also plays a role in chlorophyll production.

It is critical in leading to the vegetative growth in a plant but can become problematic when over applied for several reasons.

Such as-

Environmental issues

Increased insect pressure

A plants’ inability to retain blooms, such as in tomatoes

Balancing a plant’s need for nitrogen at the time it is required by the plant is a matter of timing it’s application. Even though it is abundant in the air we breathe, unlike phosphorus and potassium, it is not found in sufficient levels in the soil because it is not present in the parent material giving soil its properties.

By themselves, plants cannot use atmospheric nitrogen. It has to be converted by nitrogen-fixing bacteria in the form of NO3¯ or applied in a plant available form at the right time.

Due to the fact, the form most available to plants has a negative charge, it is not held in the soil and is more sustainable to leaching. If you recall, the cation exchange capacity is a soil’s ability to hold onto positively charged ions.

Nitrogen management is centered around optimizing nitrogen fixation by the soil biology and minimizing loss by using good management practices such as timing and location of fertilizers and manures.

With some conventional forms of nitrogen such as ones that are ammonium based, except ammonium sulfate, they have an acidifying effect on soil. Meaning they lower the pH. This can be an issue with over applying it and repeated long-term use. It is often not seen immediately but as somewhat of a cumulative effect based on cropping history, moisture, temperate, etc.

Over the past several years I have not seen that to be as much of an issue with organic sources. However, I have not found much research or data on the subject either. It should be noted that everything you put into the soil at some point in time effects it, whether immediate or long term.

Let’s talk about some common organic nitrogen components used in fertilizers.

First, I’m going to start with a three that are conventional component equivalents. Meaning they are still a naturally derived source, that can be used in an organic system but is more soluble and available to the plant quicker rather than later making them somewhat similar to that of conventional chemistries.

Blood Meal

It typically has an analysis of 10-13%N

It has been shown to have deer and rabbit repellant properties when used as a top dress. However, it may attract other animals such as raccoons and dogs.

Blood meal is primarily hemoglobin, which is a protein, and iron. In my experience, I have found the concentration of iron not to be an issue, just something to be mindful of

It can be cost prohibited to use it as a single source of nitrogen. However, when added to a blend It is a rapid release source making it a significant component when used with other mid and slower release forms

Chicken Manure

Of all the manures it is, in general, the one highest in nitrogen typically ranging from 2-8%

Keep in mind the analysis of manures of any type can be extremely variable based on source and solid to liquid ratios

It is available in several forms from liquid to pellets and relatively inexpensive depending on what part of the country you are in

It is also a good addition if lime and phosphorus are needed

Sodium Nitrate (Chilean Nitrate)

It is water soluble at a guaranteed 15% total N availability, with 2% potash, and 1% sulfur. The new formulation has allowed for ease of shipping because it is no longer considered a hazardous material.

The fact it is readily solubilized in water makes this the best choice for a starter fertilizer, especially for corn. It gives corn the boost it needs to get out of the ground even if planted into soils that might be cooler than what is generally required to get the best germination rate.

It can be an expensive insurance policy if not used accordingly and applied with good seed to fertilizer placement at the right rate. This is when cleaning, calibrating, and using the right equipment are essential as well.

I highly recommend using it in a blend as opposed to a straight source of nitrogen for several reasons. First, it can be expensive. Second, it is available almost immediately to the plant, making it the first to be used during the growing season, leaving the plant with nothing in reserve for the next several weeks that nitrogen is vital to develop enough vegetation for the plant to efficiently and adequately be able to perform photosynthesis. Remember it is a balance between vegetative growth and reproductive growth.

Next, the following have medium to slow release rates of nitrogen. They are relatively insoluble.

Fish/crab/shrimp meal

Typical analysis ranges from 5-30%N

Typically, fish ranges from 5-9%N depending on whether it is a meal, powder or liquid

Crap and Shrimp range from 10-30%N with 11-18%Ca depending on the shell to meat ratio

Crab makes an excellent addition to a fertilizer blend for the extra calcium, and the addition on an enzyme called chitin that has been shown to help control nematodes in the soil

Peanut meal

A typical analysis is 8-9%N

Can be cost prohibitive and not allowed due to allergen restrictions

Bone meal

A typical analysis is 3-4%N

It is also a good source of phosphorus and calcium

Feather meal

Typical analysis 11-15%N

Apply early in the season to take advantage of slower release rate providing nitrogen over the course of the growing season

 Soybean meal

A typical analysis is 6-7%N

A good source for full season nitrogen supply

Soybean meal has been shown to burn new seedlings and reduce germination rates potentially. Care should be exercised when timing the application

 Manures

For years now, agricultural manures have gotten a lot of press. After taking the PA Nutrient Management courses, I concluded – shit’s complicated. Gone are the days you cleaned the barn and piled it out of the way so you could spread it when you had more time. Raw manure is the most nutrient dense. The longer it composts it losses its nutrient value. Over applying it, can lead to not only environmental issues also pest and disease challenges.

However, there is one manure that is gaining popularity with tobacco and cannabis growers, and its bat guano. It is cost prohibitive to use on a large scale, but I feel it is important enough to mention as a potential source of not only nitrogen but phosphorus as well, while being low in salts.

A typical analysis is 5-12% depending on the source

It is fast acting and soluble in water making it a great addition to a liquid program for cannabis especially vegetative and flowering stages

I have several growers using it in sub-irrigation systems for starting organic tobacco. They like the fact its water soluble and doesn’t seem to burn the way other fertilizers have a tendency to do if not managed correctly.

 There are several other sources I could mention that are used for nitrogen such as corn gluten, alfalfa meal, legumes, and cottonseed meal.

We’ll cover those and more during the time remaining in the 52 Weeks of Agronomy Series.

Ag 101 Week 41

It’s Not Just Fairy Dust & Go-Go Juice – It’s Chemistry

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Five years ago, when I told my Dad, I was going to work for an organic fertilizer company there was a long pause of silence.  After some more discussion he concluded that it must not be that big of a company so why not get back into the workforce with a small local business. Little did we know what I had gotten in to.

It was culture shock in more ways than one.

If you recall, I’m the girl that still thinks Kenny & Dolly are platonic and…

I didn’t come from the world of ‘organic/all-natural’ fertilizers. I came from a long line of tried and true conventional farming chemistries and practices that my family still uses today. Chemistries that are not even an option for or for that matter are even somewhat shunned by over 50% of the growers I currently work with. I almost titled this week’s post, “I Go Both Ways.” Because I work with all types of farmers/growers; large, small, conventional, certified organic, everything in between, and the list keeps growing.

Here’s why-

Agronomy is a universal language spoken between the soil and the crop. Fertilizers and amendments are chemistries, whether they are naturally or synthetically derived, that are used to increase the efficiency and effectiveness of the soil and plants communication. Whether it is a by-product of industry, created in a lab, dug up from a mine somewhere from around the world, hauled out of the ocean, or an extract from a plant it is chemistry. All need to be used responsibly to ensure the future of farming, our food supply, and the environment.

As I started learning and getting more and more familiar with the world of organics I brought my dad to meetings so he too could learn and hear about the fascinating ways which they use all the amazing resources our world has to offer.

After one meeting, while we were having coffee, he said, “I guess I was wrong Monica. The way you explained things made me realize it’s not just fairy dust and go-go juice. You have a mighty big task ahead of you to get both sides to realize that and the farmers that use them to do so as efficiently and effectively as possible.”

Don’t be fooled; I still get the funny comments like, “Do you make them spin in three circles before sprinkling the fairy dust, or do they sprinkle then spin?” Or, “Why does go-go juice attract so many cats?” Better yet, “What’s Monica bringing to the family reunion? Fish and kelp, haha!” However, my dad has come a long way from the once staunch naysayer to one of my biggest supporters, and for that, I am very grateful.

Ask my neighbor; I also make several recommendations with conventional chemistries I don’t even mention in some circles. While we are working in our gardens, she graciously listens as I tell her about the fine line I walk between both worlds.

Considering I have ‘a mighty big task ahead of me’ and we are at a point in the growing season that farmers should be soil testing to make amending and fertilizing decisions, over the next several posts we’re going to talk about what makes up a bag of fairy dust otherwise known as organic fertilizer.

If you recall I’ve talked about how fertilizer blends are not always one size fits all. I do find myself recommending more amending and management options before fertilizers to most farmers. However, the more you understand what each component can do, the more informed decision you can make.

https://www.theaccidentalagronomist.com/news/2018/3/3/fertilizers-and-pajamas

Just as I stated in Week 11 comparing fertilizer blends to pajamas, there are fillers added to them for specific reasons ranging from making up the volume to helping the product flow through manufacturing and spreading equipment. Those ‘fillers’ come with consequences both good and bad depending on whether you are aware of them and can plan in others areas of your fertility management. However, using a blend can extend a fertility plan and reduce the number of applications if careful consideration is made when choosing which one you use

Look at a bag of fertilizer as an engine, and each component in that blend has a piston, understanding the specific function of each piston is key to buying the right fertilizer and more importantly using it the best way. That knowledge along with a soil test and knowing the type of soil you’re working with is what gives you the necessary pieces of the puzzle in putting together a sustainable fertility plan.

 Not quite the look I was going for, but thank you Google Images for the help

Not quite the look I was going for, but thank you Google Images for the help

The link below is a free e-book titled Understanding Amendments & Fertilizers I put together over a year ago. I’m in the process of updating it and offering this one to you as an intro to organic and all-natural amendments & fertilizers for signing up to receive news and updates.

Over the next several weeks we’ll cover nitrogen, phosphorus, potassium, and trace mineral components that make-up what goes into a bag of fertilizer, and you’ll see it’s not just fairy dust and go-go juice.