Effect of cutting, phosphorus and potassium fertilization on guar plant (Cyamopsis tetragonoloba) in newly reclaimed soil in Egypt

abonos potasicos crop yield cyamopsis psoralioides engrais potassique fauchage graine mowing mucilage mucilages mucilagos potash fertilizers potassium sulphate proteine proteins rendement des cultures rendimiento de cultivos sandy soils seeds semilla siega sol sableux suelo arenoso sulfate de potassium sulfato de potasio superfosfato superphosphate