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Anhydrous, warm temps, and rain
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bigmiker
Posted 12/24/2015 08:15 (#4983505 - in reply to #4983195)
Subject: RE: very good cy fan


SW Ontario
Unless the ground is frozen there is always some conversion happening. How much conversion is usually dependent on temperatures. Below 50 degrees the rate of conversion is slowed, but not stopped. So yes there will not be much conversion happening percentage wise when you compare it to how much was applied. However, considering that the amount of nitrogen applied to some fields is rather large, even a small percentage amount of conversion over a large acreage will still produce quite a bit of leached nitrogen. So when a "little bit" of leached nitrate from each field is concentrated into drains and rivers, it can easily become a problem.

One other thing to keep in mind: ammonium attaches to soil particles and is not easily lost. The same cannot be said for those same soil particles when we experience heavy rainfalls.
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