SINGH, Amanjot; CHAUHAN, Jaieep; SHAKYA, S.K. Status of Nitrate-nitrogen and Salt Pollution in the Groundwater of District Ludhiana, Punjab. Journal of Soil and Water Conservation, India, v. 37, n. 1 & 2, 2022. Disponível em: https://epubs.icar.org.in/index.php/JSWC/article/view/129396. Acesso em: 12 jun. 2026.