Sorghum (Sorghum bicolor L. Moench.) is a popular summer fodder and cereal crop in Pakistan. Unawareness of farmers regarding fertilizer level and seed rate effect the optimum crop production. A study was carried out to optimize the fertilizer levels and seed rate for economical production. Response of fertilizer levels of P2O5 & K2O (20-20, 40-40 and 60-60kg ha-1) with constant level of N 57kg ha-1 and seed rates (5, 7.5, 10, 12.5 & 15kg ha-1) on fodder and grain yield of sorghum (Sorghum 2011) was studied during Kharif 2016 and 2017. It was found that fertilizers (P2O5, K2O) levels and seed rate had significant impact on plant height, diameter of stem, 1000 grain weight, grains head-1 and yield of grain but no significant impact was observed on number of tillers m-2 and head m-2. The study revealed that maximum grain yield (2816kg ha-1) was achieved with the lowest seed rate (5kg ha-1) and PK fertilizer dose of 40-40kg ha-1 along with constant dose of nitrogen at the rate of 57kg ha-1, while doses (20-20 and 60-60 PKkg ha-1) for P2O5 and K2O respectively with seed rate of 7.5kg ha-1 was found statistically similar. Further, maximum number of plants m-2 and height of plant was achieved under seed rate of 15kg ha-1. It was observed that height of plant increased in all levels of fertilizers and stem diameter decreased gradually by increasing seed rate, however, stem diameters was increased by increasing fertilizer but it caused morphological changes resulted in plants lodging.
