Highly weathered soils low in available sulfur in their A horizons often have adequate supplies of available sulfur in deeper,clay-rich horizons.
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Q18: The opposite process from mineralization is _.
A)immobilization
B)nitrification
C)denitrification
D)ammonification
E)none
Q19: In the early stages of plant nitrogen
Q20: Applied to agricultural crops,the term lodging refers
Q21: On the average,agricultural soils in the US
Q22: Forests in decline because of acid deposition
Q24: Because of their huge numbers and direct
Q25: Although slow release fertilizers take longer to
Q26: Ammonia volatilization is a process by which
Q27: Applying heavy dressings of N fertilizer will
Q28: The terms "ammonium fixation" and "biological nitrogen
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