De Silva, R.L.2015-06-192015-06-191977Tea Quarterly47(1-2)pp.12-22https://dl-tri.nsf.gov.lk/handle/1/116AgricultureTea plantationsAgricultural resourcesAgricultural landSoil resourcesWater resourcesVegetationFactors affecting productivity on tea estates in Sri Lanka. 3 proper land useArticle