Effect of N, P, and S fertilizers on alfalfa grown on three soil types in northeastern Saskatchewan. II. Nitrogen, P, and S uptake and concentration in herbage.

azufre clay soils engrais fertilizantes fosfatados fertilizantes nitrogenados fertilizers loam soils medicago sativa nitrogen fertilizers phosphate fertilizers silty soils sol argileux sol limoneux sol sablolimoneux soufre suelo arcilloso suelo franco suelo limoso sulphur textural soil types tipos texturales de suelos type de sol textural