The effect of site and different long-term fertilization on agrochemical soil properties and the content of some hazardous elements in soil

analyse de sol application rates azote cadmio cadmium chrome chromium cinc clay soils cobalt cobalto cobre copper cromo cuivre disponibilidad de nutrientes dose d'application engrais organique fosforo humus inorganic fertilizers lead loam soils magnesio magnesium nickel nitrogen nutrient availability organic fertilizers phosphore phosphorus plomb plomo potasio potassium sandy soils site factors soil chemicophysical properties soil testing sol argileux sol sableux sol sablolimoneux suelo arcilloso suelo arenoso suelo franco zinc