Warnakulasooriya, W.M.S.; de Silva, D.A.M.; Yapa, P.I.
(Research Centre for Social Sciences, Faculty of Social Sciences, University of Kelaniya, Sri Lanka, 2016)
Due to long lasting exploitation and specially, chemical fertilizer that used to get more yield cause to destroy, all of the beneficial microbes from the soil in cultivated area .Therefore, we couldn’t able to take the ...