SHARMA, ASHWANI KUMAR, and VINOD KUMAR. 2014. “Effect of Varying Levels of Nitrogen and Plant Density on the Production Behaviour of Undersize Seed Tubers of Potato (Solanum Tuberosum) in North-Western Hills of India”. The Indian Journal of Agricultural Sciences 84 (3): 407–10. https://doi.org/10.56093/ijas.v84i3.38593.