Wijewardena, J.D.H.2021-09-242021-09-241993Tropical Agriculturist, 149:p.1-11https://dl.nsf.gov.lk/handle/1/25375AgricultureCompostCattle manurePoultry manureChemical analysisPlant nutritionSoil pHEffect of organic and chemical fertilizers on vegetable cultivation in upcountry intermediate zoneArticle