SOOD A, CHHIBBA IM, VERMA VK, SHARMA PK, NAYYAR VK. Soil-fertility constraints in different physiographic units in aridic areas of Bathinda, Punjab. Indian J Agri Sci. 2014;72(6). Accessed October 28, 2025. https://epubs.icar.org.in/index.php/IJAgS/article/view/40890