TY - SER ED - American Society of Agronomy. ED - Crop Science Society of America. ED - Soil Science Society of America. TI - Journal of environmental quality SN - 00472425 PY - 1972///- CY - Madison, Wis. PB - : American Society of Agronomy, : Crop Science Society of America, : Soil Science Society of America KW - MEDIO AMBIENTE KW - CALIDAD DEL MEDIO AMBIENTE ER -