If you plant soybeans, allow the plants to grow full size,and disc it under, it will help nitrate the soil.
There is a trick, if you breed earthworms, you can use manure from
many animals to feed the worms, they will help to convert useless
soil and manure into richer soil. When it is damp, move the extra worms
out into the rows upon the farm at night, there's nothing better for the soil.
I know of a few folks
who raise rabbits
and keep the earthworms beneath.You can sell earthworms by mail
to fishermen, to generate cash, once you have a surplus.
You may or may not already have a compost pile.
Do you have any wild hogs causing trouble upon your land?