Clay does need ammendments, we spread horse bedding on it all winter. I get the 10 acres about 3/4s manure covered in that time with a very thin layer of wood fiber type bedding.as the annual ammendment addition. This helps the micro organisms in the soil to “pull down” the fiber, plant matter, into the soil to help clay be more absorbent, develop a good turf layer.
The annual fertilizing is ABSOLUTELY needed to get the needed minerals into the soil to feed the plants. Haying removes these minerals with feeding hay to the horses, not returning anything to the soil. Horses use those nutrients in their bodies, so horse manure is not really very good fertilizer like sheep, cattle or pig manure is.
We purchased the hayfields after they were dormant, not cut or fertilized for almost 25 years. Well covered with various weeds, scrub brush bushes, small trees. It was going back to forest, so it took a while to get cleared to plant hay grasses, then let them grow, develop roots, turf. I finally quit getting stuck on wet clay every time I drove over there! I mowed the new planting to 5 inches several times each season for 2 years after the seed went in. This forcied root growth instead of leaves. Reseeded where grass was sparse or as we cleared more ground, got rId of burn pIles.
I took multiple dirt samples from all over the fields, mixed them, got that soil tested. The fertilizer guy said it was the WORST soil test he had ever seen, in all his years at the fertilizer plant!! There were almost no lines showing color to indicate any mineral presence in the soil!! I was rather surprised because the weed cover “looked” thick, vigorous before we cut it down.
He suggested a plan of several small fertilizer applications a couple months apart, to get the total of needed amounts of minerals into the soil. Land could better absorb small amounts, much less chance of rain washing it away down the drainage ditches, using small amounts. So that is what we did. I got new soil tests done the next spring, for a different mix of fertilizer that first full summer. Showed some improvement, had mineral lines with color on that test! Again, put on spring and fall, to not overload the land trying to absorb it. Now, almost 7 years later, we do still soil testing, usually annually. My present fertilizer amounts needed are MUCH less, just keeping minerals balanced to have nutritious hay. My mineral lines now all have good color, show I have needed amounts to grow grass hay. If I would plant corn or beans, I would need different mineral balances in my fertilizer mixes.
My fertilizer guy is real happy with the soil test results. I am only applying fertilizer once yearly now, since I don’t need so much with better balanced soil. You have to replace minerals lost with baled hay removal. I am very happy with the hay test results, minerals in the acceptable ranges for horses, nothing low. Sugar tests high because it is grass hay, hard to avoid sugar in grass hay. We have no dietary issues in our horses because they are kept rather trim, no fat ones here, old or young. We are big believers in feeding forages instead of “grain” feedstuffs. Lots of grazing, though not 24 hours a day. Lots of good grass hay in winter. Their once daily corn and oat mix is for getting vitamins and Selenium/Vit E in them. No one gets over half a pound daily unless they are preparing for competition, still not over a pound then.
Fertilizing regularly does make a big difference in hay results. But without soil testing regularly, hay testing, “you don’t know what you are really missing!” Looks can be deceiving on hay bales. Some very nice looking hay we got contained almost no nutrition, our horses looked terrible by spring! This experience got me testing the hay because “looks” sure fooled us!! We had been buying hay for many years, thought we knew what we were doing. Felt pretty stupid looking at the thin horses.