Weeds diversity, weed abundance and crop sequences diversity

This file describes weed richness and abundance as well as crop sequence diversity and management intensity for around 200 arable fields monitored in French between 2002 and 2010. We computed the diversity and abundance of weeds for both pluri-annual (i.e. five consecutive cropping seasons) and annual (i.e. winter cereal cropping season) species pools. Annual species pools were monitored at the beginning of a cropping season (T1) or at the middle (T2), both in presence or absence of herbicide sprayed.