00256nam a2200097Ia 4500008004100000082002000041100002500061245003400086260003000120300000800150140113s9999    xx            000 0 und d  a631(02)   P7.96  a"Sparks, D. L., ed."  aAdvances in Agronomy -vol. 96  a2007bElseviercAmsterdam  a428