EFFECT OF CUTTING, PHOSPHORUS AND POTASSIUM FERTILIZATION ON GUAR PLANT (CYAMOPOSIS-TETRAGONOLOBA) IN NEWLY RECLAIMED SOIL IN EGYPT

A two year experiment was carried out in newly reclaimed soils (sandy soils) to investigate the effect of cutting and phosphorus and potassi um fertilization on the growth, yield, seed mucilage content and seed protein content of guar plant. The results revealed that different cut ting treatments significantly decreased the plant weight. seed yield, seed mucilage content and seed protein content. Phosphorus fertilizati on up to 350 kg super-phosphate (15% P2O5)/feddan significantly incre ased plant weight, seed yield. seed mucilage content and seed protein content. Fertilization with 150 kg potassium sulfate (48% K2O)/feddan was quite capable to meet guar plant potassium demands in this kind of soil. Without cutting plants, fertilization with 350 kg superphosphat e and 150 kg potassium sulfate/feddan resulted in the highest seed yie ld, seed muculage content and seed protein content.