00281nam a2200097Ia 4500008004100000082001600041100003500057245005700092260002600149300000800175140113s9999    xx            000 0 und d  a631.84   M4  aIndian Society of Soil Science  a"Nitrogen in Soils, crops & fertilizers(Bull.No.13)"  a1984bISSCcNew Delhi  a520