Sirisena, D.N.Atkinson, D.2020-04-112020-04-112001Annals of the Sri Lanka Department of Agriculture, 3:p.237-244https://dl-doa.nsf.gov.lk/handle/1/1955PLANT SCIENCE AND PRODUCTIONNitrate uptake15NNaturally abundant 15N to determine the rate of nitrate uptake by plantsArticle