Hasselo, H.N.2015-06-192015-06-191965Tea Quarterly36(3)pp.122-136https://dl-tri.nsf.gov.lk/handle/1/185BiochemistryLeavesNutrient contentsChemical analysisFoliar diagnosisPlant nutrientsThe nitrogen, potassium, phosphorus, calcium, magnesium, sodium, manganese, iron, copper, boron, zinc, molybdenum and aluminium contents of tea leaves of increasing ageArticle