Effect of Phosphorus and Sulphur Fertilization on Economics of Blond Psyllium (Plantago ovata Forsk) and Optimum Doses of Fertilizers

A field experiment was conducted to study the effect of phosphorus levels (0, 10, 20 30 and 40 kg P₂O₅ ha^-1) and sulphur levels (0, 10, 20 and 30 kg S ha^-1) on economics of blond psyllium (Plantago ovata Forsk) and optimum doses of fertilizers. The results showed that application of phosphorus significantly increased the net returns and seed yield of blond psyllium up to 30 kg P₂O₅ ha^-1. Whereas, B:C ratio significantly increased up to 20 kg P₂O₅ ha^-1. Application of sulphur significantly increased the net returns, B:C ratio and seed yield up to 20 kg S ha^-1. A level of 37.17 kg P₂O₅ ha^-1 and 28.824 kg S ha^-1 were found optimum doses for grain yields of 1288.54 kg ha^-1 and 1260.115 kg ha^-1, respectively.