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Old 01-31-2011, 11:38 PM
Kiril Kiril is offline
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Join Date: Jun 2007
Location: District 9 CA
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Originally Posted by JDUtah View Post
6.8 lbs N is quite a bit. Now you must understand that this number probably reflects total N. In which case, most of it will not be plant available the first year. (roughly 5 to 10% of N from compost is made plant available the first year, depending on the compost and/or maturity)
The amount of N available from a given compost varies widely. Even if you were to put numbers on it, a generic first year availability might be more like 10-30% N available the first year, and that isn't even considering historical management and other natural sources of N (clipping return, N deposition, N fixation, etc...). Without knowing the breakdown of N in the compost or the site conditions, it is impossible to make any informed management decision on N availability, much less put a number on it.
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