The absolute best thing you can do to help your soil is to stop tilling it, I think we all know that. Beyond minimizing soil disturbance, we need to keep the soil covered for as many days per year as possible by including cover crops in your routine planting strategy. When your cover crops include a diversity of several different types of plants (grasses, legumes, brassicas and non-legume broadleafs) your soil will have the best opportunity to increase the soil biology needed to maximize carbon and nutrient cycling.
Grant Woods’ “Proving Grounds” are located in Missouri so he has no trouble planting both spring and fall cover crops and getting the most growing degree days out of both of them. I planted both summer and fall cover crops last year (here in the U.P.) and I have to say that I was not entirely happy with the results. I definitely could have used a longer growing season. Of course, last year was my first year of using zero synthetic fertilizers as well so I am sure that may have had some influence on the volume of forage that grew in my plots. I will be anxious to see what my soil tests look like this year, but I will likely be tweaking my planting strategy this year again - LOL - I usually do on a fairly regular basis anyway.
This is what my summer cover crop looked like last year. I did use the Green Cover Seed computer calculator to establish the amounts of each category of seed…
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I will see if I can find my fall cover crop recipe…