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Keep sharing! Just not sure what to add. You are doing a fine job and it aint boring!
Thank you buddy! I am learning a lot as I share, so it is super interesting for me!! I cannot wait to take some soil tests this spring!!
Keep sharing! Just not sure what to add. You are doing a fine job and it aint boring!
Giles, my friend, that is a very good question. I will try to be somewhat brief as the answer in my mind is not very simple.
Here is my attempt to answer this in a coherent way -
Brassicas (turnips/radish/rape/etc.) are non mycorrhizal - however, there are a few written pieces out there that speak of the benefits of have non mycorrhizal plants and their root structurers in coexistence with plants that are outside of normality (aka mycorrhizal plants). See link below for some of information on this and why it can be beneficial, mostly noted is the nutrient acquisition of P.
https://link.springer.com/article/10.1007/s11104-017-3427-2
So if I sat here and tried to tell you brassicas pull X nutrients out of the soil - I would be lying to you, as I do not know what biology/geology will react in the soil, in a specific way to yield certain results. What I can tell you, the image I attached will do a better job explaining than I, is that by having brassicas you are doing as follows:
1. Creating soil structure
2. Balancing your CtoN - brassicas have fairly low CtoN (depending on the level of maturity) - microbes will break these down faster, good to have with or following high CtoN (rye, wheat, etc.)
3. Brassica root exudates (liquid carbon from photosynthesis) will feed the soil (see image below).
Side bar - way above my pay grade - but worth noting:
One study showed them having a probability in their ability to breakdown PAH's in soil. Remember C8 from Dupont in the Ohio valley years ago? 8 Carbon atoms linked, very tough stuff, Teflon, not know to break down - they found some science that some brassica root exudes did have an impact on the degradation of these PAHs in the soil - see link - https://www.liebertpub.com/doi/abs/10.1089/ees.2017.0156?journalCode=ees I do believe they have some ways of using aerobic bacteria in ponds to break these PAHs down today but I could be mistaken as I am going from memory.
Sorry for the side tracked comment, back to regular programming below:
4. Deep tap roots are mining nutrients form deep in soil
5. Brassicas naturally break up "hard pan" of soil through their tuber production/root production
6. Very attractive to whitetails, that means more deer feces and unration occur on our fields - OM baby!!
7. Although I am not 100% certain on my understanding of the symbiotic relationship between brassicas roots and micro bacteria, it does seem they are at minimum anti pathogenic - in other words - suppressive of nematode and soil born fungal pathogens. link for more information: https://www.nature.com/articles/s41598-017-17949-z
View attachment 117621
As you see in the above example, soil and soil heath is extremely complicated. We know our native soils were EXTREMELY diverse. Through this extremely diverse soil structure and diversity, nature built the soils you see today in Iowa, Indiana, Western Ohio, etc.
Diversity
Not tilling
Natural decomposition to feed the soil biology
fire/buffalo/re-growth
start over
This is what occurred for thousands of years. Harnessing exorbitant amounts of carbon and feeding microbial life that scientist are learning more about every year.
So in short - yea. Plant some brassica but dont only rely on them - they do use a lot of soil nutrients so you need to replenish those with clovers, grains, etc.
Hope you all are enjoying this as much as I am - I keep learning more and more. I want this to be a resource center for folks as well.
Be safe!
AT
So every farmer in the world should be using a brassica as a cover crop?
There are many reasons why more farmers don't use more cover crops. Timing of planting cover crops can be an issue. In the spring if you kill a cover crop and it turns wet it takes much longer to dry the soil out, delaying planting hurts yields. If you plant into soil with lots of residue there can be problems with slugs and other insects and diseases. The cost of seed, equipment, fuel, labor.
Increasing organic matter with cover crops is nearly impossible. There is roughly 2 million pounds of top soil (6 inches deep)in an acre. To raise it 1% point takes 20,000 of dry matter. A good crop of corn is about 3-4 ton of dry matter, most cover crops produce much lower amounts of dry matter. Soil types, crops grown, crop rotations all play a factor.
Don't get me wrong, there are benefits but you can't ignore the problems. I have used some cover crops for many years and understand both sides. They have place but aren't magic.
Keep sharing! Just not sure what to add. You are doing a fine job and it aint boring!
Yep, I don't know shit, so I let you experts explain it.View attachment 118259
Just remember there's a lot of bullshit info out there on farming, often from people selling something (books, speaking fees, seed, chemicals etc.). And what works one place might not work at another place or with different crops. What works on a small plot isn't necessarily practical over large areas and visa versa. I used to rent a farm that was only a mile away from my home farm. The soils were completely different. I absolutely couldn't grow cover crops or no-til that ground (I tried) the soils were too heavy.
Most farmers don't farm the way they do because they are lazy, stupid, greedy or controlled by the government. They do it because it works on their land with their crops. Every farmer I know is always interested in how to do a better job. If a farmer in the area changes something and it works you'll see the neighbors adopting the practice shortly. If cover crops worked 1/2 as well as the books and videos say you would see a bunch more people doing it. I explained in my first post why while it looks good on paper there are real issues in the real world.
Thanks Jim!All ground is different. Like Sam said, what works in one area does not necessarily work in another. No-till up here where I live, in heavy clay, predominantly hydric soils, can be very difficult and often times fruitless. I think all of this Regen Ag stuff is awesome... I think it’s great... I really do. I also know every farmer I know wants to do what is best for their land and their livelihoods. Although there are a lot of ways each side can learn from each other, the fact is that farming for a living and planting food plots for deer are entirely different things. I’m not saying anything we all don’t already know here. Al you bring a ton of excellent and useful information to the table. I hope you continue to do so. And I think Sam brings an incredible amount of real world knowledge to the conversation as well.