Evaluation of interaction effect of some herbicides and diammonium phosphate application on growth and yield of wheat

The study was conducted during the 2023-2024 agricultural season in Nineveh Governorate, Tel Kaif District, Wannah location according to latitude and longitude (36.535916, 42.764820), located 60 km north of Mosul city center. The objective was to Evaluation of interaction effect of some herbicides and di ammonium phosphate application on growth and yield of wheat. The study included two factors: the first, Fertilization: Ground DAP fertilizer (18:46:0) applied once at planting, and Foliar DAP fertilizer (18:46:0) applied twice, first (Zadoks scale 17) 24/12/2023 and second (Zadoks scale 25) on 12/2/2024. The second: (Control, Timeline Trion EC , Atlantis OD , Pallas OD , Discipline OD , Axial 050 EC + U46-Combi fluid 6 SL(Mix) and Totic 10 EC + U46-Combi fluid 6 SL(Mix). The Planting was conducted in the experimental field on 26/11/2022 using the Babel 113 variety. The experiment was applied according to the international experiments system and designed based on the randomized complete block design (R.C.B.D) with three replicates. Foliar fertilization excelled in reducing the density and weight of weeds, recording (16.84 weeds.m-2 and 17.21 g.m-2) compared to soil fertilization. However, there were no significant differences between the fertilizers in all yield traits except for plant height, where soil fertilization outperformed foliar fertilization, recording 94.49 cm. The herbicide Discipline, (Mix) Axial+U46, and (Mix) Totic+U46 excelled in reducing the density and weight of weeds, recording (12.70, 13.48, and 13.16 weeds.m-2 and 12.11, 13.33, and 12.55 g.m-2) respectively. Additionally, the herbicide Discipline and (Mix) Totic+U46 excelled in the traits of the number of spikes and grain yield, recording (613.71 and 603.21 spikes.m-2 and 901.25 and 907.42 g.m-2).