00266nam a2200097Ia 4500008004100000082002000041245003100061260002900092650002100121650002600142220204s9999 xx 000 0 und d a631/635bADV.49 0aAdvances in agronomy. V 49 aNew YorkbAcademicc1993 aNutrient cycling aSoil salinity mapping