00261nam a2200097Ia 4500008004100000082002000041100002400061245003500085260003500120300000800155140113s9999    xx            000 0 und d  a631(05)   L1.23  a"Brandy, N.C., Ed."  a"Advances in Agronomy, Vol.23"  a1971bAcademic PresscNew York  a407