00449nam a2200157Ia 4500008004100000082002300041245004300064260003500107650001800142650001100160650002900171650002500200650002500225650002300250650001800273220204s9999    xx            000 0 und d  a631/635bADV.51-53 0aAdvances in agronomy. V 51, V 52, V 53  aNew YorkbAcademic Pressc1993  aCrop rotation  aGypsum  aPoultry waste management  aSoil water relations  aTillage conservation  aWater conservation  aWetland soils