Enhancement of crop productivity of red onion using tea-waste biochar as a soil amendment

Abstract

Biochar (BC) is a low cost adsorbent produced by the pyrolysis of biomass which can be used for agricultural purposes. Tea waste is an excellent biomass for BC production since it is an abundant solid waste in Sri Lanka. T he presented work was carried out to study the impact of BC as a soil amendment on the quality of Kalpitiya soil and the crop productivity within a time period of 3 months. Soil was collected from 3 different sites located at Kalpitiya during October for the greenhouse experiment where the particle size was ranged below 1 mm.