00423nam a2200133Ia 4500008004100000082001700041100001500058245006800073260005200141300000800193650004100201650003400242653001300276170901s1993    xx            000 0 und d  a631.84bA17N  aAbrol, Y.P 0aNitrogenbSoil Physiology, Biochemistry, Nicrobiology, Genetics  aNew YarkbIndian National Science Academyc1993  a285  aAgriculture and related technologies  aTechnology (Applied sciences)  aNitrogen