Muhammad Sohail Memon, A. A. Siyal, J. Changying, A. A. Tagar, S. Ara, S. A. Soomro, Khadimullah, F. Ullah, and N. Memon. “Effect of Irrigation Methods and Plastic Mulch on Yield and Crop Water Productivity of Okra”. Journal of Basic & Applied Sciences, vol. 13, Oct. 2021, pp. 616-21, doi:10.6000/1927-5129.2017.13.99.