Competitive effects of wild oats on wheat were studied in an additive design. The competitive effects of wild oats on wheat were apparent from 45 dasy after sowing (DAS) as leaf area and dry matter production were reduced in wild oats infested plots. The differences between various treatments widened with time. Increasing the wild oat denshy from 0 to 288 m−2 reduced leaf area of wheat at 60 DAS by 33–41% and at 90 DAS by 60–72%. For dry matter production, the reduction was 35–48% at 60 DAS and 69–73% at 90 DAS. Light penetration was also affected. The percentage light interception illCre'ased as the number of wild oats present increased.
