00423nam a2200145Ia 4500008004100000082001600041100001600057245004000073260004600113300000800159650004100167650003400208653001600242653001900258170901s1973    xx            000 0 und d  a631.8bA45M  aSingh, Amar 0aPrayogik Mrida Urwarta evam Urwarak  aLucknowbU. P. Hindi Grandh Academyc1973  a125  aAgriculture and related technologies  aTechnology (Applied sciences)  aFertilizers  aSoil fertility