Experiments conducted on zinc deficient alluvial soils of Kartarpur (Punjab) revealed that the potato yield increased significantly by zinc application but the degree of response varied with the method of zinc application. Soaking of seed tubers in 0.05% ZnSO4 solution for 3 hrs. was found to be the best in productivity and profitability, followed by soaking of seed tubers in 0.025% ZnSO4 solution, two foliar sprays of 0.2% ZnSO4 solution, at 40 and 60 days after planting and soil application of 8 kg Zn/ha at planting. The Zn content of leaves, increased significantly with zinc application through foliar sprays or soil application but it did not increase in tubers. Zinc uptake was highest in soil application of 8 kg Zn/ha, followed by two foliar sprays of 0.2% ZnSO4 and soaking of seed tubers in 0.05% of ZnSO4 solution.
