Dataset on weed sampling, biomass and rice yield to determine critical period of weed interference in rainfed low-input cropping systems in the middle-west region of Madagascar

Full dataset (raw data calculated at plot level) on weed biomass, Weed cover, weed surveys and rice yield, tiller number and height based on a experiment to determine the critical period of weed interference in the middle-west region of Madagascar on two cropping seasons (2016/17 and 2017/18).