00409nam a2200145Ia 4500008004100000020001500041082001400056100001700070245004100087260003900128300000800167650004100175650003400216653001300250170901s1988    xx            000 0 und d  a8176638587  a631bS48P  aSingh, S. S. 0aPrinciples and Practices of Agronomy  aLudhianabKalyani Publishersc1988  a409  aAgriculture and related technologies  aTechnology (Applied sciences)  aAgronomy