Supun Madushanka

tractor order insect case study two way anova research sedges grass biology weed anuradhapura salinity inland salinity kalpitiya ground water quality ground water jaffna nitrate level phosphorus soil gas field paddy emission methane maintain tractor maintenance flower roses hydraulic transmission power nursery nursery management insect order hymonoptera carbon saturation carbon thysanoptera diptera reproduction cow cattle ai artificial insemination proposal white lotus cic challenges to extension to n symbiotic n fixation history of the diesel engine engine diesel engine sustainable agriculture smart fertilizers participatory methods agricultural technology methods participatory methods in agricultural technology ancient irrigation system irrigation ancient nitrogen ammonification nitrogen cycle local tree use key respondents dialogue garcinia cambogia garcinia goraka cinnemon nitogen fixation denitification #nitrification