Maximizing your fertility plan is not all that complicated. All you have to do is focus on some basic principles, and you can reduce the amount of fertilizer you use and grow better crops, whether it's in your garden or fields.
Here are four things you can do today to make your fertility program more effective-
1. Irrigation
Have a plan and design that works for the scale you grow at. Most growers I work with wish they had designed their irrigation first and beds or fields second.
2. pH Management
Regardless of the size, you grow at, and this can make or break your whole fertility plan making it ineffective if you're not paying attention to it. You would be better off not using fertilizer at all until you get pH managed first.
3. Use best management practices (BMP's) that work for your management style and farming system. Examples of BMP's are:
Mowing/grazing regularly
Reducing compaction
Keeping walkways, beds, and fields clear of debris
Disposing of infected debris appropriately
Harvesting in a timely fashion
Focus on 1 & 2
The list goes on & on
4. Not only get a soil test but invest in understanding what it means for your soil, crop choices, and your management style. Look beyond the graphs and pay attention to the numbers.
Effective and efficient fertility plans start before you even buy fertilizer or put a plant in the ground.
The Friday February 21st Edition of Talking Dirty with The Accidental Agronomist-
I've seen several posts on social media recommending growers get soil tests and even quoting prices.
I'm going to be brutally honest-
I understand farmers and growers want to help others in their industry achieve the level of success they have, but it is disheartening to hear them give half or even misinformation. Frankly, it makes me question their motives. Do you want to help, or do you want the attention? I struggle with this every day too. Even as a professional in the industry, using social media is still very uncomfortable, I feel I walk a fine line between helping and distracting most days.
With the unprofessional rant out of the way, this is my professional option on soil testing.
1. Be consistent with the time of year you are testing. You get a more accurate view of long-term soil fertility because soil temperature plays a vital role in nutrient availability. I prefer growers test in the fall to be able to establish amending and fertility plans. You amend soil and feed plants. I write about this in week 5 0f the 52 Weeks of Agronomy
https://www.theaccidentalagronomist.com/news/2018/1/21/ag-101-week-5
2. Use a lab within a relative distance of your farm. They will understand the type of soils you are working with better than a lab thousands of miles away will. I list a few of the labs I work with on the resources page of the website.
3. Be consistent with the lab you use to stay consistent with extraction methods. Nutrients respond differently to different extractions methods.
4. The most important of all - Get all the information you need! I can't stress this enough. It would be like going to the doctor and only getting half or some of the tests they needed to make an accurate diagnosis. It's a waste of time and money. If you are getting a $9 soil test, you are not getting all the information you or an agronomist needs to make a sound fertility plan. Soil testing has nothing to do with price; it has everything to do with quality and the right information. I talk about this in Week 24 of the 52 Weeks of Agronomy
https://www.theaccidentalagronomist.com/news/2018/6/11/ag-101-week-24
Production growers, one growing for profit, need to focus on soil fertility more than soil health. I talk about this in Week 2 here
https://www.theaccidentalagronomist.com/news/2018/1/5/ag-101-week-2
Being a production grower is taking the concept of soil health to the next level and focusing on a sound soil fertility program that is environmentally effective and cost-efficient.
Talking Dirty with The Accidental Agronomist - Take One
The Homesteader Edition
After writing about agronomy for a year, I decided I would do something different.
Even though I have gained two more chins due to the number of prescription drugs I have been on for the past six months and my complete lack of technical skills, I decided I would start doing video interviews with all types of people either directly or indirectly involved in agriculture.
Nothing scripted or even really edited, just a one on one conversation about agronomy.
For the first interview, I sat down with a friend I’ve known for a while now to get her take on what agronomy means to her as a homesteader and let her ask a question or two as well.
Meet Diane, a backyard gardening homesteader from somewhere in Pennsylvania.
Ag 101 Week 52
The Golden Rule
Can you believe it! This is the last you will hear me using the phrase, The 52 Weeks of Agronomy.
Unless I turn it into a made for TV movie or a fiction novel and travel the world doing book signings.
I don’t think that is happening anytime soon. I tried to watch the video I made for week 27 and convinced myself the only saving grace was I didn’t take my clothes off. It’s so bad I’m not even putting a link to it. My family is still petitioning me to remove the link to it altogether.
It has been a wild journey getting to this point. After taking some time and re-reading several of the posts, I can say I’ve laughed, cried, and wondered” What the heck was I thinking when I wrote that!?
However, one thing keeps coming to mind when I look back over the last 52 weeks.
Soil, much like people, follows one golden rule. You know, that rule we all heard about as kids.
Treat other’s the same way you want to be treated
Or, in agronomic terms
Give back to the soil what you have taken from it
It’s that simple. There is no complicated formula, no fancy terminology needed, no industry jargon to convolute and be confused by. Just give back what you have taken.
Why should you give back…?
Soil is selfish, and plants are horny
To keep soil productive and plants reproducing you have to continually manage the fertility needs of both. Giving soil back what it needs to support the plant's recreational activities that ultimately benefit us.
That’s it — nothing more, nothing less.
Just a simple exercise of reciprocity between the farmer and the land using all the information we've covered over the last 52 weeks
Ag 101 Week 51
Agronomic Testing Options
My titles have not become any more creative, but I get my point across.
This is the second to last post of the 52 Weeks of Agronomy Series. I would be lying if I didn’t say I’m slightly relieved. At the same time, I’m looking forward to having more time for other projects that do not require typing, or at least me doing it. Maybe one will require me wearing out a red pen ripping apart someone else’s grammar. Who knows!?
What I do know is that we have come to the time of year farmers have questions. They have them year-round, now they have more time to ask them.
One of the most recent questions I’ve gotten is regarding the different types of agronomic testing available to farmers and growers.
The following is part of an email conversation with a grower I work within Maryland-
The farmer asked,
“I was thinking about doing a sap sample of the grass and clover in the field and also a Brix's reading at the same time. What are your thoughts?”
My response was,
“As far as the sap and Brix's testing, from an agronomic standpoint they won't change any soil fertility recommendations I’ve made. Everything I look at and take into consideration is based on soil tests in conjunction with tissue testing depending on the type of crop, farming system, and whether the grower will see an economic return for the costs of the tests. I'm looking at the actual nutrient levels of nitrogen, phosphorus, potassium, calcium, etc. There are so many variables like time of day the sample was taken, what part of the plant was sampled, and what calibration standards were used, it would make it difficult for an agronomist to base a soil fertility assessment on sap and Brix's levels.
Tissue testing utilizes dry matter - it’s a picture at the moment at that part of the plant sampled as to what is there
Sap testing utilizes the fluid portion of the plant; it's similar to a blood test - keep in mind that fluids are constantly moving and every nutrient moves at different rates
There are always variables in any kind of testing; you can't mitigate for everyone. However, soil and tissue testing are the best tools currently an agronomist has to look at what is going on at that moment in time.
That being said, and due to the fact, you are testing sugar and protein levels in the plant with the Brix's test, from a forage quality standpoint, the results may be of value to an animal nutritionist when determining rations and taking animal health into consideration.”
Here are some common agronomic tests, followed with a brief description and some of my thoughts on them.
Standard soil test- I talk in detail about what a soil test should include in week 24
https://www.theaccidentalagronomist.com/news/2018/6/11/ag-101-week-24
Soil health assessments conducted by universities include soil typing and physical analysis of samples similar to what Cornell offers at the following link
http://soilhealth.cals.cornell.edu/testing-services/comprehensive-soil-health-assessment/
In general, I recommend a standard soil test and use the link at the Web Soil Survey
https://websoilsurvey.sc.egov.usda.gov/App/HomePage.htm
Using both of those is comparable to Cornell’s package costing considerably less
Soil paste test-
In general, this test shows what nutrients are immediately available to a plant because they are not bound to a colloid.
It is also one of the most accurate tests for measuring soil salinity which can be a common problem in soils in the central and western part of the country.
Some agronomist’s feel a standard soil test plus the paste test is the most accurate way to determine soil fertility needs. In my experience, it is farm, soil type, and management dependent as to whether you will see a return on investment for the extra cost.
Plant tissue test-
As stated before in my email response; tissue testing utilizes dry matter - it’s a picture at the moment at that part of the plant sampled as to what is there.
It is a good measure of the nutrient status of a particular plant at that moment in time giving you a picture of what may typically be happening. It is a good indication of the efficacy of your fertility program as well. Tissue tests are dependent on timing, plant temperature, and growth stage the sample was taken.
Typically, guides are offered for the plant stage at which a tissue sample should be taken based on crop type. The sample is taken when the plant is actively growing, so timing is critical.
Spectrum Analysis offers a detailed guide to plant tissue testing
https://www.spectrumanalytic.com/services/analysis/plantguide.pdf
Plant sap analysis-
This is the best analogy I have come up with for sap testing-
Sap testing utilizes the fluid portion of the plant; it's similar to a blood test - keep in mind that fluids are constantly moving and every nutrient moves at different rates
The following is an interesting article regarding sap analysis
https://www.specmeters.com/newsletter/if-plants-could-talk-vol-4/
I believe it can be a useful in-field test. However, there are variables such as operator error that would make me uncomfortable using it as the sole means of making fertility recommendations.
There are a few labs in the states that conduct sap analysis. One of them being
https://www.crophealthlabs.com/
Brix test-
A brix test is the measure of the sugar content found in a plant tissue sample that has been pulverized, and the aqueous solution from that is then put in a refractometer and read.
Once again as with the sap testing, I believe it has in field use especially in a grazing operation. However, the variables associated with it make it suitable for field use and not what I would base a sound soil fertility program on.
I work with growers that use it in the field to help with harvest decisions with a tremendous amount of success. Using well-calibrated equipment with consistent protocols for testing has saved them time and money ensuring they harvest at that crop’s peak quality and nutrition levels.
Just as with plant sap analysis I believe it can be a useful in-field test. However, there are variables such as operator error and calibration protocols that would make me uncomfortable using it as the sole means of making fertility recommendations.
Soil Biological testing-
Co2 Burst test-
This test is a soil health indicator, measuring the amount of microbial respiration.
The following pdf is the best explanation I have found
https://www.wardlab.com/download/biotesting/Respiration_Information.pdf
I would recommend growers use this in conjunction with soil nitrate tests to make a comparison and better calibrate any side-dress nitrogen applications that might need to be applied during the growing season.
The following is a well-written extension guide from Penn State explaining pre-side dress soil nitrate testing
https://extension.psu.edu/pre-sidedress-soil-nitrate-test-for-corn
Microbial Identification-
Microbial identification is done with a microscope.
There are several consultants that provide soil microbiological identification services at the following link
https://soilfoodweb.mykajabi.com/p/find-a-consultant-lab
Water testing-
Water can be the carney in the coal mine especially when it comes to greenhouse management. pH is the most critical aspect of water testing in term of a soil fertility program and soil health. However, with water and its natural pH due to its source, comes with its dissolved elements that could be beneficial or not depending on the situation. The best measure to determine the impact irrigation water will have is through testing.
The following are links to labs I regularly use for soil and water testing
https://www.spectrumanalytic.com/
http://www.waypointanalytical.com/
Entomological/ Pathological testing for field crops-
Before I started the 52 Weeks Series, I wrote a post titled “What’s an Agronomist, Anyway?”
Here’s an excerpt-
“On any given day as challenges and questions are posed to me, I have to think like a biologist, a chemist, a botanist, sometimes a pathologist, and if I’m really confident an entomologist. Usually, I defer to experts on the pathology and entomology. I know enough to be dangerous and kill stuff. “
As an agronomist, I kill stuff or keep it alive depending on what the farmer wants me to do.
What I can also say is I have been doing this long enough to make a definite diagnosis like thrips, aphids, blights, rusts, etc. However, when it goes beyond the obvious, I send a sample to the local land-grant university for identification. That’s what they are for, as well as other services.
Some good references to have on hand to make common identifications easier are-
Introduction to Plant Diseases: Identification and Management by George B. Lucas & Lee Campbell
Garden Insects of North America by Whitney Cranshaw
The Ortho Problem Solver by Michael D. Smith
Forage test-
Ask an animal nutritionist or forage specialist. I can’t be an expert at all things.
In week 44 I discuss potassium and admit what my dad refers to me as
https://www.theaccidentalagronomist.com/news/2018/10/29/ag-101-week-44
With that in mind here are basic ratios I look at when interpreting a soil test for forages-
Calcium to phosphorus 1.7:1
Calcium to magnesium 2.7:1
Calcium to sulfur 2.1-1
Potassium to calcium 1.5:1
Potassium to magnesium 4:1
Protein to sulfur 50:1
Nitrogen to sulfur 8.8:1
Potassium should be between 3.0-3.5% Calcium between 70-75% of the base saturation
One of the best agronomists who has an extensive forage background and one I’ve had the pleasure to be around and learn from is Dave Wilson from Penn State Extension.
Here’s a link to two articles he has written
https://extension.psu.edu/shopby/dave-wilson
In summary-
This is in no way an exhausted list. There are several tests that are similar but have different names based on the lab offering them.
I am not suggesting that every farm needs to be doing all the mentioned tests. Each one mentioned is another layer of management in the overall plan of how you are running your farm. They are not meant to be used in every case all of the time. Every farmer needs to weigh if the results from the analysis will yield an adequate return on investment for their operation.
Just as the title states, they are agronomic testing options.
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
An app I’ve used is called Plantix.
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
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
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.