The number of cultivars in varietal winter-wheat mixtures influence aboveground biomass and grain yield in North China

This study evaluated the influence of cultivar number in wheat cultivar mixtures on aboveground biomass and grain yield across two years with different rainfall. Field experiments were conducted in the 2014–2015 (wetter-than-average) and 2015–2016 (drier-than-average) growing seasons in northern China. The study contained either one cultivar (16 × monoculture) or combinations of cultivar mixtures containing two (8 × mixture-2), four...