Manaf F, Ismail R, Sukor ASA. Effect of Different Nitrogen Percentage Input On Soil Fertility, Plant Nutrients and Yield of Organic Spinach (Amaranthus Spp.). Res. Agric. Livest. Fish. [Internet]. 2022 Sep. 5 [cited 2024 Sep. 27];9(2):135-44. Available from: https://banglajol.info/index.php/RALF/article/view/61619