Effect of Phosphorus and Sulphur Fertilization on Yield Attributes and Yields of Blond Psyllium (Plantago ovata Forsk)

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 yield and economics of blond psyllium (Plantago ovata Forsk). The results showed that application of phosphorus significantly increased the spikes per plant, seed and biological yields of blond psyllium up to 30 kg P₂O₅ ha^-1, however, spike length, grains per spike, test weight and straw yield were significantly increased up to 20 kg P₂O₅ ha^-1. Application of sulphur significantly increased the grains per spike, seed, straw and biological yields up to 20 kg S ha-1, however, spikes per plant significantly increased up to 30 kg S ha^-1 and spike length up to 10 kg S ha^-1.