Khan, Muhammad Nisar, Ghulam Sadiq Afridi, Hamida Bibi, Hassnain Shah, and Sajida Taj. “Evaluation of a Training Program on Soil Fertility and Crop Yield Improvement Techniques: Soil Fertility and Crop Yield Improvement Techniques”. Proceedings of the Pakistan Academy of Sciences: B. Life and Environmental Sciences 56, no. 1 (March 9, 2019): 57–65. Accessed March 12, 2025. http://ppaspk.org/index.php/PPAS-B/article/view/186.