Blog Posts

Do We Need Organic Variety Breeding Programs?

Texas A&M AgriLife Peanut Breeding

Yes!  That was easy.

Many plant breeders and seed companies are hesitant to grow and sell organic varieties – as you know there is a lot of paperwork!  Also, even if the organic variety is superior there is the concern that conventional growers won’t buy or even look at a great variety with an organic label.  But there is a growing body of evidence that we need to be looking at varieties from below the ground first before looking at the above ground yields.

            What am I talking about?  Well according to many sources but in particular an article in Trends in Plant Science, “Breeding crop varieties with the target of improving soil health and reducing soil degradation will produce better conditions for crop growth through more efficient resource use and stress tolerance, so a win-win is possible where both yield and soil are improved and could be the cornerstone of regenerative agriculture.”

            “By targeting soil structure building traits (in plant breeding), abiotic (environmental) stress resistance of both plants and soils could increase through microbial habitat formation to improve nutrient cycling, stabilization of soil against erosion, and a greater capacity of soil to absorb, store and drain water,  … but these processes are generally ignored in plant breeding, where the primary focus is yield.”

            In other words, the scientific ability to monitor and measure what roots are actually doing is teaching us how important they are to “naturally” living and interacting with soil and all the microbiome in soil.

            “Perhaps plant breeding exacerbated soil degradation by focusing on yield and resource capture in conventionally fertilized soils.  Fertilizers (conventional) decrease the benefit of root-soil interface plant traits such as exudates and root hairs to capture nutrients (the normal, natural process) making those exudates and root hairs expendable.”

            This article, like many others, gets very technical and in-depth, but the premise is we need to look at what a variety is doing below ground as well as above ground.  In organic systems, plants must be able to interact with the soil microbiome in the root rhizosphere to take in nutrients, protect itself, and be more water efficient.  So, YES, we need organic breeding programs producing highly efficient, high yielding organic varieties!

Planting Quality Seed

Photo by Southeast AgNet Radio

Dr. Justin Tuggle did a great job at the Organic Cotton/Peanut Seminar discussing peanut seed quality.  He showed some great pictures of peanut seed with the seed coat removed showing the damage underneath. His point, which is 100% right, is that this damage is causing the germination problems in peanut fields and this damage is mostly caused by harvest equipment.  

I was in a “webinar” recently and part of the discussion was damaged cotton seed as well.  Some observations have shown that upwards of 30% of the seed in a bag is damaged in some way.  In some cases, the damage was up to 50%.  The seed may germinate but it is evident that the vigor is diminished.  This was in a conventional seed bag with seed treatments!

Corn seed can have just as many problems but again seed treatments can make a difference and do.  I have seen lots of estimates but in cold soils damaged corn seed in the bag can lower overall germination 20% to as much as 50%.

This issue is difficult to solve but realizing some of the causes is a big first step.

Survey of Organic Producers

At the Organic Cotton and Peanut meeting in Seminole I asked producers to fill out a quick survey of their production. It was anonymous and the information is very valuable as we plan organic programs. Here are the results:

Average years farming – 18.6
Average of total acres farmed – 3,726
Average of total acres organic – 1,210
Average of organic peanut acres – 659
Average of organic cotton acres – 1,055

Rank all these problems you face as an organic  farmer?

#1 Weeds    (ranked most important)
#2 Disease or insect problems
#3 Adapted organic seed varieties
#4 Market Price or Marketing Issues
#5 Water/Irrigation
#6 Organic fertilizer  (ranked least important)

What is your source of information for organic farming?

#1 Other growers  (most responses)
#2 Consultants
#3 Company representatives
#4 Texas A&M AgriLife Extension/Research
#5 ACRES, Rodale, other organic groups
#6 Other sources  (least responses)

            When I asked the question how growers heard about the meeting, most said “from other growers” but in close second was the “Organic News” newsletter like the one sent out every other month. Still, most growers are getting news and information from each other!

Cotton Varieties Planted. I asked producers who did the survey to tell me the cotton varieties they plant.  I know there aren’t really any true organic cotton varieties but, these conventional varieties are the most used.

Cotton Varieties: University of Arkansas – UA48, Green Dirt Exceed –  2244, 4344, 6000 and 6494, Brownfield Seed and Delinting –  BX4, BX9, and BSD 598, Israel Ido Tal Pima – GL 6 and V 70, Gowan – 1432 Pima Hybrid

Peanut Varieties Planted. Same question for those that plant peanuts knowing that there is no “organic” peanut variety but plenty that are used on organic acres.

Peanut Varieties:  Spanish AT 9899, TamVal OL14 , Tamnut OL 06, Valencia C, Span 17, Valencia 309.

Check out the latest newsletter!

Click on the picture to see the actual newsletter

Here is the latest newsletter mailed to folks interested or involved in organic agriculture. Yes, I still mail out newsletters you can hold in your hand!

To see the newsletter just click on the picture above and it will take you to a pdf you can either read or download and print.

Lots of good information and as always I welcome your comments and suggestions.

Corn and Sorghum Grower Meeting

If you farm in the Northwest Panhandle of Texas here is a great opportunity to get both conventional and organic corn and sorghum grain or silage production information.

I will be discussing organic corn and sorghum production, integrated pest management techniques and strategies for organic pest control, soil health and fertility related to organic crop production and a good emphasis on organic weed control. I will also discuss cover crops, rotations and equipment for organic weed control. This will be an in-depth look at the types of cultivators and timing for good control of weeds in an organic system. Should be fun!

Does soil management affect soil health?

An extensive research project conducted in Sweden shows it does….

There is a huge amount of research work done and a significant portion is so specific that you can’t make application to anything in the real world. On the other side there is research that is so broad and almost meaningless that there is no way to apply it in the real world.

The title of this research is, “The influence of soil management on soil health: An on-farm study in southern Sweden.”1 I like this study because it took a look at the relationship between a soil management index (SMI) they developed for the research and soil health indicators that were developed at Cornell called the CASH (Comprehensive Assessment of Soil Health) protocol. This CASH system looks at the physical, biological and chemical properties of a soil to develop an overall quality score. The Haney soil test does the same sort of thing.

The soil management index (SMI) for the over 20 farms in the study was developed by (1) quantifying the crop diversity, (2) the frequency of soil disturbance and the (3) number of applications of external organic amendments (manure). These 3 items would make up the SMI score and then they compared that to the soil health indicators for those particular farms. Clear as mud? Don’t worry because what matters are the results!

What are the results?

  • Soil management significantly affected all measured soil health indicators.
  • Fields with a higher soil management index (SMI) showed better soil health.
  • Soil health of farm fields was generally poorer in comparison with unmanaged soil. Unmanaged soil was a forest area or good pasture area.
  • The ratio of soil health of farmed to unmanaged soil increased with increasing SMI. (This is important!)

So, what they found was that all the soil health measures got better the higher the SMI number was. Generally, this would make sense and be what we would expect. What I was surprised by was that there were two soil health indices that were strongly influenced by the soil management – wet aggregate stability and extractable soil protein (organically bound nitrogen available to microbes). Soil texture seemed to have more effect on these other three soil health indicators – active carbon, soil respiration and soil organic matter. Soil management did have an effect on these three, but texture had a stronger effect.

Wet aggregate stability is a measure of how well the soil stays together in a rainfall simulation. Aggregate stability means the soil is stable, held together but all kinds of things, one of which is the glue our microbes supply if they are active. Good soil aggregation means less compaction, room for water movement and root growth. Second, the extractable soil protein is a measure of the food available to those microbes. I think it makes sense that a high SMI would mean a high Soil Health Score! Wouldn’t you expect that to happen if you reduce tillage, add in cover crops or change up your crop diversity and add soil organic amendments?

Lastly, there is some thought that a tool like SMI, properly developed, could be a way to know if we are increasing soil health. This research analysis is showing they are highly correlated and that is a good thing. Also, it might be a way to measure and pay for potential carbon sequestration because a healthy soil does sequester carbon.

  1. Hanna Williams, Tino Colombi, and Thomas Keller, “The influence of soil management on soil health: An on-farm study in southern Sweden,” Geoderma 360 (2020): 114010, https://doi.org/10.1016/j.geoderma.2019.114010. ↩︎