Variability in the relationship between crop yield and weed density for winter wheat and Bromus sterilis

Abstract

Triticum aestivum and Bromus sterilis were grown in additive mixtures. In general, considerable variation in the effect of weed density on crop performance was observed between locations, but not between fields within locations. At low weed densities, grain number per ear of wheat was more affected by B. sterilis than was number of ears; at high weed densities the opposite was found. Weight of individual grains was increased by presence of B. sterilis. -from Authors