Distribution and characteristics of problem soils in India and their management for crop production International symposium on distribution, characteristics and utilization of problem soils

acid soils agentes nocivos asia asie chemical soil types chemicophysical properties deterioro del suelo environment environnement estructura del suelo facteur nuisible inde india injurious factors inorganic compounds manejo del suelo medio ambiente mise en valeur du sol plant production production sales saline soils salts sel site factors sodic soils soil deterioration soil management soil morphological features soil physicochemical properties soil structure soil types soil zonation sol acide sol salin sol sodique structure du sol suelo salino sulfate sulfatos sulphates trait morphologique du sol type de sol type de sol chimique