00259nam a2200097Ia 4500008004100000082002100041100002300062245003300085260003500118300000800153140113s9999    xx            000 0 und d  a631 (02)   L8.30  a"Brady, N.C., ed."  aAdvances in Agronomy -vol.30  a1978bAcademic PresscNew York  a293