“Effect of Different Nitrogen Percentage Input On Soil Fertility, Plant Nutrients and Yield of Organic Spinach (Amaranthus Spp.)”. Research in Agriculture Livestock and Fisheries 9, no. 2 (September 5, 2022): 135–144. Accessed July 5, 2026. https://banglajol.info/index.php/RALF/article/view/61619.