Manaf, F. , Ismail, R. and Sukor, A.S.A. 2022. 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, 2 (Sep. 2022), 135–144. DOI:https://doi.org/10.3329/ralf.v9i2.61619.