[Water and soil conservation in semiarid bean region in Mexico] | Conservacion de suelo y agua en la region frijolera semi-arida de Mexico

clima climat climate cobertura verde conservation de l'eau crop yield cultivo de temporal culture pluviale erosion live mulches mexico mexique minimum tillage mulch vivant phaseolus vulgaris rainfed farming rendement des cultures rendimiento de cultivos soil types tipos de suelos travail du sol minimal type de sol water conservation water erosion wind erosion