SINGH, SATISH KUMAR, and ABHIK PATRA. “Status of Soil Available Nickel (Ni) in Different Districts of Eastern Uttar Pradesh, India”. The Indian Journal of Agricultural Sciences 90, no. 11 (December 16, 2020): 2209–2216. Accessed October 22, 2025. https://epubs.icar.org.in/index.php/IJAgS/article/view/108597.