Response of Bread Wheat Crop to Tillage Systems and Chemical Herbicides Under Supplemental Irrigation

The experiment was carried out at Agricultural season 2024-2025 at midtown of Mosul city, the experiment was include two factor, tillage system (conventional tillage without herbicide) and conservation tillage with using limitless herbicide, and the second factor the varieties of soft wheat (Kallar, Adena, Ebaa). the seed were sowing at mid of December of 2024 by 100 kg / h-1, add the fertilizer according of recommendations of Agriculture Ministry (100 kg of DAP) with planting of seeds. The experiment was applied according factorial experiments using Randomize Complete Block Design with three replication. Limitless herbicide was spraying at last week of February. The conservative agriculture system with the use of pesticide was superior to the traditional agriculture system in plant height, reducing the number of narrow-leaved weeds and their dry weight, as well as the dry weight of broad-leaved weeds by 5.23 cm, 4.44, 14.22 and 15.77 g/m2, while the two systems did not differ in the rest of the studied characteristics. The Pharaonic cultivar was superior to the other two cultivars in plant height and yield by (26.5 and 45.33 cm) (2.17 and 13.17 g/m2). The best plant height for the Pharaonic cultivar with conservative agriculture and the use of pesticide was (97.33 cm). The Najia cultivar was superior with traditional agriculture in the amount of grain yield (353.67 g/m2). The aim of the research was to disseminate conservation agriculture technology system in Nineveh Governorate the research was conducted in cooperation with the World Food Program (W.F.P).