00343nam a2200133Ia 4500008004100000082001900041245003100060260002900091650001300120650001600133650002300149650002000172650001700192220204s9999    xx            000 0 und d  a631/635bADV.1 0aAdvances in agronomy. V 01  aNew YorkbAcademicc1949  aAgronomy  aFertilizers  aSoil microorganism  aSoil phosphorus  aWeed control