00263nam a2200097Ia 4500008004100000082002100041100002500062245003400087260003600121300000800157140113s9999    xx            000 0 und d  a631(02)   P8.100  a"Sparks, D. L., ed."  aAdvances in Agronomy -vol 100  a2008bAcademic PresscAmsterdam  a255