00268nam a2200097Ia 4500008004100000020001500041082002000056100002100076245003700097260003600134220204s9999    xx            000 0 und d  a0123743558  a631/635bADV.98  aSparks, Donald L 0aAdvances in agronomy, 2008. V.98  aAmsterdambAcademic Pressc2008