00417nam a2200133Ia 4500008004100000082002000041100001900061245003300080260003500113300000800148942000700156952010300163999001700266140113s9999    xx            000 0 und d  a631(02)   N4.52  a"Sparks, D.L."  aAdvances in Agronomy -vol.52  a1994bAcademic PresscNew York  a281  cBK  00104070aVTLbVTLd2014-01-13l0o631(02)   N4.52pVBK4606r2014-01-13 00:00:00w2014-01-13yBK  c61190d61190