weed biomass was influenced by cover crop type · sowing date interaction. Also, the results indicated that increasing biomass weed resulted
in linear reduction of grain yield. The highest ear weight, ear length, leaf weight, grain length
and yield were obtained for cultivation of clover with corn. Synchronic cultivation of companion
crops with corn had higher grain length and yield compared with cultivation 15 days after corn.
The lowest weed biomass was recorded for concurrent cultivation of corn with clover due to rapid
growth and high competitive power of clover in the early stage of growth