The present study was carried out at Sakha Agricultural Research Station during 1996 and 1997 seasons to study the effect of different levels of N (0, 60, 90 and 120 kg/fad) and sources of P (mono calcium phosphate and triple phosphate) under three rates 0, 15 and 30 kg P₂O₅/fad on growth, productivity and crude protein of forage sorghum “cv local hybrid 102" and balance between nitrogen and phosphorus. Randomized complete block design with four replications was used. Combined analysis of variances was done for total fresh and dry forage yield over both seasons. It was found that high levels of N and P encouraged plant growth and gave the tallest plants, with thick stem  diameter. Fresh and dry forage yield, and crude protein content were increased by increasing nitrogen and phosphorus levels at all cuts in both seasons. The addition of (120 kg N + 15 kg P₂O₅ monocalcium phosphate)/fad was the superior. It produced 56.35 and 49.70 ton/fad fresh forage yield in 1996 and 1997 seasons, and 8.155 and 6.642 ton/fad dry forage yield in both seasons also, respectively. Also it had the highest leaf/stem ratio (fresh and dry) with higher crude protein content.