What treatments should be appled to an apple tree planted in a ultisols environment?
I planted a Jonathan apple tree on some family property where heavy red clay soil (Ultisols) is abundant and unavoidable. The idea is to eventually make hard cider.
I dug a pretty deep pit, mostly extracting red-brown soil. I mixed some of the soil with a little hay, a layer of worm-rich composted soil closer to the root system (mainly composted leaves and horse shit), and at the deepest point in the pit (close to 4’) I scattered a some fresh horse shit because that was a convenient place to be rid of it. The idea behind the hay and manure was in part about encouraging drainage, though the composted soil seems quite soft.
I was wondering if any other treatments are suggested. Note that I am hoping to keep this tree as organic as possible, so I’m fine with not adding anything if it’s not necessary.
This question is in the General Section. Responses must be helpful and on-topic.