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rickgthf
Senior Advisor

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?

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BA Deere
Honored Advisor

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   Smiley Happy

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