In general the n cycle processes of fixation

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Unformatted text preview: n general, the N cycle processes of fixation, mineralization and nitrification increase NH3 ammonia R-NH2 organic N When legumes are tilled into the soil, the N stored in their roots is released and made available to the next crop or lost to the environment, depending on management. In mixed legume-grass stands, the grass can utilize N fixed by the legumes. If the stand has 25% or more legume, no additional N is needed. The Nitrogen Cycle Mineralization is the process by which microbes decompose organic N from manure, organic matter and crop residues to ammonium. Because it is a biological process, rates of mineralization vary with soil temperature, moisture and the amount of oxygen in the soil (aeration). R-NH2 organic N NH3 ammonia NH4+ ammonium Mineralization readily occurs in warm (68-95°F), well-aerated and moist soils. In New...
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This note was uploaded on 10/12/2012 for the course BIOTECH BT101 taught by Professor Gardy during the Spring '12 term at Indian Institute of Technology, Chennai.

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