00318nam a2200121Ia 4500008004100000082001600041100002700057245002500084260003000109300001500139600002900154650001300183140224s9999    xx            000 0 und d  a631(045.1)   aSparks, Donald L., ed.  aAdvances in agronomy  aAmsterdambElsevierc2006  av89, 344p.  aEdited  Donald L. Sparks  aAgronomy