Effect of Zinc and Phosphorus on Yield, Nutrient Uptake and Oil Content of Mustard Grown on the Gypsum-treated Sodic Soil

Experiments were conducted for two consecutive rabi seasons of 2001–02 and 2002–03 at the cultivators field in order to find out the effect of zinc and phosphorus on mustard in gypsum-treated sodie soil irrigated with high RSC water by applying four levels of phosphorus (0, 30, 45 and 60 kg P₂O₅ ha⁻¹) and three levels of zinc (0,5 and 10 kg Zn ha⁻¹). The yield of mustard (seed and stover) and oil content were influenced by the rate of phosphorus and zinc. Application of 60 kg P₂O₅ ha⁻¹ along with 5 kg Zn ha⁻¹ gave significantly higher yield and oil content of mustard. Application of P and Zn significantly increased the P and Zn uptake and oil content of seed with increasing levels of P and Zn but P uptake decreased at higher level of Zn. The available P and Zn content of soil increased significantly with application of P and Zn.