GURJAR, D S; YADAV, B R. Seasonal Variation in pH, Salinity, Nitrate, Fluoride and Heavy Metals in Irrigated Soils of South-West Region of Delhi, India. Journal of the Indian Society of Soil Science, India, v. 61, n. 1, 2013. Disponível em: https://epubs.icar.org.in/index.php/JISSS/article/view/31751. Acesso em: 17 jul. 2026.