Quando il suolo va in laboratorio [analisi del terreno in Italia].

analyse de sol analytical methods azote calcio calcium calidad costos costs encuestas nutricionales fertilidad del suelo fertilisation fertilizer application fosforo institution de recherche ion exchange capacity italia italie italy liquid manures magnesio magnesium nitrogen nutrition surveys organic matter ph phosphore phosphorus potasio potassium purin quality research institutions salinidad salinity soil fertility soil testing soil texture technique analytique textura del suelo texture du sol