Effect of different planting dates and weed density of wild oats Avena fatua L on the growth and yield of wheat Triticum aesitivum

The research was carried out at the Agricultural Technical College / Mosul during the agricultural season (2021-2022) to assess the growth and production of wheat under the conditions of different planting dates and plant density for wild oats, in plastic Pots with a height of 30 cm. and a diameter of 30 cm, according to the system of global experiments and by random design Whole and with two factors, the first factor is the planting date of the wheat crop and at two levels (early date, late date) and the second factor is the density of wild oats weed and at four levels (comparative treatment wheat without weed, ten plants of wheat with two weeds, ten plants of wheat with four weeds, ten plants of wheat with six weeds) and with three replications. The results showed: the moral superiority of the early date over the late date in all studied traits, the superiority of treatment (6 weeds + 10 wheat) over the rest of the treatments in the height of the wheat crop plants, the superiority of the control treatment and treatment (2 weeds + 10 wheat) over the rest of the treatments in the number of straws For wheat plants, there was a gradual significant decrease in the characteristics of spike length and number of spike grains with increasing number of weed plants. The interaction between the early date and treatment (2 weeds + 10 wheat) achieved the highest rate of height of the wheat crop plants, reaching (80.63) cm. Thus, it significantly outperformed all interactions, while the interaction between the late date and treatment (2 weeds + 10 wheat) recorded the lowest rate of height of wheat plants, reaching (32.69) cm. The interaction between the early date and treatment (2 weeds + 10 wheat) achieved the highest number of The shreds for the wheat crop reached (2.86) shavings and thus significantly outperformed all the interactions, while the interaction between the late date and the treatment (6 weeds + 10 wheat) gave the lowest number of straws, reaching (1.20) shackles, which caused the interaction between the early date And treatment (0 weeds + 10 wheat) gave the highest rate of spike length and the number of grains in the spike, as it reached (10.23 cm. and 27.46 grains) for the two traits, respectively, while the interaction between the late date and treatment (6 weeds + 10 wheat) recorded the lowest length of the spike and the lowest number Of the grains in the spike, it reached (4.53 cm. and 18.06 grains) for the two traits, respectively.