00489nam a22001697a 4500003000400000008004100004020001500045082001700060100001700077245005700094250001800151260004200169300001100211650004200222650003500264650002000299OSt230705b        |||||||| |||| 00| 0 eng d  a8127213152  a631.42bS48S  aSingh, S.S.   aSoil fertility and nutrient management/by S.S. Singh  a2nd. rev. ed.  aLudhiana:bKalyani Publishers;c2004.  a253 p.  aAgriculture and related technologies   aTechnology (Applied sciences)   a Soil Fertility