Casey IL. ( I -70 ) then south on rt.49 | Jim what are your CEC's doing. They should be rising also if so you got your answer.
The other thing to look at is the humus or OM. rising, This would all help lead to your ph. rising.
One of the best way to increase these [ cec, om, ] in your ground is continuis corn follwed by wheat. pasture or hay for more than one yr. at a time.
As your ph rises I wpould think that you are seeing some other differants in your soil test also. |