Fall-applied potash & phosphorus leaching factors, hard data
Some of my neighbors are applying some of their next year's potash & phosphorous now, here in the higher rainfall Northeast. I'm skeptical about the losses.
Anybody have some hard data on leaching losses in relation to rainfall for fall-applied fertilizer?
Re: Fall-applied potash & phosphorus leaching factors, hard data
Phosphorus will probably stay put. Potash will leach in low cation exchange soil (sandy) there`s no room to push aside hydrogen to attach to a soil colloid, higher the pH the less exchangeable hydrogen. I wouldn`t waste money building K on soils with a higher than 6.5 pH.
So, it depends on what soils and soil tests you guys are dealing with