Effects of environment and farming practices on species composition and production of permanent meadows in the Veneto region (Italy)

arrhenatherum elatius azote azoto botanical composition coltivazione composition botanique composition globale composizione botanica composizione globale concimi inorganici crop yield cultivation cultivo environmental factors facteur du milieu factores ambientales farmyard manure fattori ambientali fertilisation fertilizer application fosforo fumier highlands inorganic fertilizers letame liquami liquid manures llanuras lolium multiflorum meadows nitrogen phosphore phosphorus pianure plaine plains potasio potassio potassium prados de siega prairie de fauche prati pratique culturale proximate composition purin rendement des cultures rendimiento de cultivos veneto