00425nam a2200133Ia 4500008004100000082002000041100002500061245003400086260003600120300000800156942000700164952010300171999001700274140113s9999    xx            000 0 und d  a631(02)   P1.73  a"Sparks, D. L., ed."  aAdvances in Agronomy -vol. 73  a2001bAcademic PresscSan Diago  a173  cBK  00104070aVTLbVTLd2014-01-13l0o631(02)   P1.73pVBK4747r2014-01-13 00:00:00w2014-01-13yBK  c61331d61331