00261nam a2200097Ia 4500008004100000082001700041100002900058245003300087260003500120300000800155140113s9999    xx            000 0 und d  a631(02)   L7  a"Reed, Charles. A., Ed."  aAdvances in Agronomy -vol.29  a1977bAcademic PresscNew York  a400