00258nam a2200097Ia 4500008004100000082002100041100002500062245003500087260003000122300000800152140113s9999    xx            000 0 und d  a631(02)   P9.102  a"Sparks, D. L., ed."  aAdvances in Agronomy -vol. 102  a2009bElseviercAmsterdam  a328