Sirisena, D.N.Wanninayake, W.M.N.2022-01-192022-01-192010Annals of the Sri Lanka Department of Agriculture, 12:p.175-179https://dl-doa.nsf.gov.lk/handle/1/4085SoilfertilizerLeaf Colour ChartRiceNitrogenFertilizer Savings in Paddy Cultivation by Adopting Leaf Colour-Based Nitrogen ApplicationArticle