Soil and water management to control plant nutrients in natural waters

abonos agua dulce azote cultivated land eau de ruissellement eau douce engrais erosion farm management fertilizers fosforo freshwater gestion de l'exploitation agricole gestion des eaux gestion du sol manejo de fincas manejo del suelo nitrogen nutrientes nutrients nutritional losses perte nutritionnelle phosphore phosphorus plantas plante plants pollution de l'eau reconocimiento de suelos runoff water soil degradation soil management soil surveys substance nutritive tierras cultivadas waste disposal water management water pollution