Effect of intensive fertilization of natural grassland on nutrient wash-out

agricultural chemicals ammonium compounds ammonium nitrate calcium fertilizers carence du sol compound fertilizers compuestos de amonio deficiencias del suelo engrais engrais calcique engrais potassique facteur de production fertilidad del suelo fertilizantes compuestos fertilizantes nitrogenados fertilizers grazing lands land natural pastures nitrate d'ammonium nitrato de amonio nitrofosfatos nitrogen fertilizers nitrophosphate nitrophosphates organic compounds organic nitrogen compounds pastizal natural pastizales pastures pollution pollution de l'eau potash fertilizers prairie naturelle production factors produit agrochimique soil deficiencies soil fertility terre tierras tierras de pastoreo water pollution