00334nam a2200121Ia 4500008004100000082001600041100002400057245002500081260004000106300001500146600002900161650002200190140224s9999    xx            000 0 und d  a631(047.1)   aSparks, Donald L.ed  aAdvances in agronomy  aAmsterdambElsevier/ Academicc2005  av.86,424p.  aEdited  Donald L. Sparks  aAdvances,Agronomy