00423nam a2200133Ia 4500008004100000082001900041100001900060245003400079260004200113300000800155942000700163952010200170999001700272140113s9999    xx            000 0 und d  a631(02)  N3.49  a"Sparks, D.L."  aAdvances in Agronomy -vol. 49  a1993bAcademic Press Inc.cCalifornia  a323  cBK  00104070aVTLbVTLd2014-01-13l0o631(02)  N3.49pVBK4587r2014-01-13 00:00:00w2014-01-13yBK  c61171d61171