00302nam a2200097Ia 4500008004100000082002300041100001400064245006300078260005500141300000800196140113s9999    xx            000 0 und d  a631.82:631.92   L1  aAnonymous  aResidual value of applied nutrients. Technical Bull. No.20  a1971b"Min.of agric., Fisheries & Food"cNew Delhi  a334