Kathiravetpillai, A.2015-08-052015-08-051985Tea Bulletin, 5(1-2):p.36-44https://dl.nsf.gov.lk/handle/1/19696AgricultureTea plantationShade treesGrevilleaAcaciaCrotalariaFertilizer applicationNitrogen fixationAspects of the shade tree questionArticle