00406nam a2200133Ia 4500008004100000082001400041100001900055245005400074260004800128300000800176650004100184650003400225653001300259170901s1998    xx            000 0 und d  a631bB60E  aBlank, Fred C. 0aEssential Aspects of Agricultural Crop Production  aBikanerbAllied Scientific Publishersc1998  a329  aAgriculture and related technologies  aTechnology (Applied sciences)  aAgronomy