Response of Some Improved Upland Rice Varieties to Different Sources and Rates of Nitrogen Fertilizer in A Humid Rain Forest Region. Am. J. Agric. Sci. Eng. Technol. [Internet]. 2021 Sep. 4 [cited 2026 Jul. 29];5(2):69-91. Available from: https://e-pallipublishers.com/index.php/ajaset/article/view/75