Raper, C.R.2016-10-182016-10-18https://hdl.handle.net/2139/43116Plants -- Effect of herbicides on -- Trinidad and Tobago -- ObservationsRice -- Weed control -- Trinidad and Tobago -- Field experimentsRice -- Yields -- Effect of pesticides on -- Research -- Trinidad and TobagoHerbicides -- Physiological effect -- Trinidad and Tobago -- ExperimentsTheses