00302nam a2200109Ia 450000500170000000800410001708200120005810000170007024500540008726000430014130000080018420260224041002.0260224s9999||||xx |||||||||||||| ||und||  a633 WOL  aWolfe, T.K.  0aProduction of field crops; a textbook of agronomy  aNew York, Mc-Graw-Hill Book Co. c2004  a495