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Old 09-13-2012, 11:00 AM
Skipster Skipster is offline
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Join Date: Dec 2010
Location: Billings, MT
Posts: 1,046
Originally Posted by turfmd101 View Post
I consider K the most volatile. Unless it's sulfur coated.
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I'm not sure where this thread has gone, but a few points may need to be considered.

1) P has always been regarded as relatively immobile in the soil. Leaching has never been a worry for water contamination with P.

2) The environmental worry about P applications are off-target apps that put P fertilizers directly in surface water (like getting fert on driveways, sidewalks, roads, and misapplications). Because P is tightly bound to the soil, the only way it can get into water after a proper application is if the soil ends up in the water.

3) K isn't volatile. Urea is volatile. Ester formulations of herbicides are volatile. Gasoline is volatile. K is not. "Volatile" simply means that a compound's vapor pressure is low and it evaporates quickly.
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