My slope area, was also hard clay soil. I got me a rototiller. Got lots of bags of garden soil, bags of peat, and lessor amount bags of manure. spilled it all about the slope area. Then had at it with the rototiller, mixing and mixing, up and down. The slope is about 25 feet long and 7 foot wide. The graduate slope gave me a break with gravity with the rototiller coming back down . Anyway, just mixing and mixing. Then raking out smooth. Today, all green and awesome the plants.
Might do that.
Deer and turkey poo has n-p-k too. Not sure what clover that would be but I would assume a white perennial. Doesn't really matter if you till it under.
Got Chicken Poo which has nitrogen but I Compost most it and use it wherever.
I rented the Tiller I used. As years go quickly, I believe I did that task about 18 years ago. Yep indeed an animal of a machine to keep hold of as I recall. But took my time. And learned if it hits a rock the back jump is not fun. I think I rented it for one day, or 8 hours. Let you keep it one overnight in the rental agreement. Somehow we got it back in the truck. And had the guys on the other end take it out. Did not cost much, and no need to find storage for it.
Gypsum is very effective at breaking up clay soils and improving aeration. It is neutral pH too.
I have some Gypsum also have some Micro Life it is supposed to be better than Gypsum.
