Chhabilendra Roul, “Agro-Ecological Sustainability of Farming Systems in Punjab and Haryana”, JISSS, vol. 70, no. 1, pp. 44–54, May 2022, Accessed: Jul. 16, 2026. [Online]. Available: https://epubs.icar.org.in/index.php/JISSS/article/view/124394