00296nam a2200109Ia 4500008004100000082001900041100002000060245004700080260003600127300001000163650001300173140113s9999    xx            000 0 und d  a631.4.8(02) P0  a" Gupta, P. K."  a"Hand book of soil, fertilizer and manure"  b"Bikaner : Agro Botanica, 2000"  a438p.  aManuring