Nitrogen :

Nitrogen : soils, physiology, biochemistry, microbiology, genetics edited by K.V.R. Tilak, Sushil Kumar and J.C. Katyal - New Delhi : Indian National Science Academy , 1993 - 285 p. figures

Kumar Sushil, ed. Soil microbiology Soil sciences Soils - Nitrogen content

572.54 / NIT

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