Univrsity of Tehran Press Iranian Journal of Field Crop Science 2008-4811 54 3 2023 11 22 The Effect of Chemical Control in Direct and Submerged Cultivation of Rice (Tarem Hashemi) on Weeds The Effect of Chemical Control in Direct and Submerged Cultivation of Rice (Tarem Hashemi) on Weeds 15 26 92008 10.22059/ijfcs.2023.323890.654857 FA Hamied Reza Shahabian Department of Agronomy and Plant Breeding, Faculty of Agriculture, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. Hassan Alizadeh Department of Agronomy and Plant Breeding, Faculty of Agriculture, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. 0000-0002-5685-6567 Mostafa Ovesi Department of Agronomy and Plant Breeding, Faculty of Agriculture, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. 0000-0003-0742-5485 Journal Article 2021 11 26 In order to investigate the effect of some herbicides with different doses in direct cultivation and comparing it with transplanted cultivation, an experiment was carried out in the form of split plots based on random complete blocks in three replications in Mazandaran in the spring of 2018. The main plots include  transplanted flooded rice and direct seeded rice and sub plots include Kancil herbicide with doses (150, 120, 90, 60, 30), Nomini herbicide with doses (250, 200, 150, 100, 50), Clean Weed with 65 doses; pertilachlor + bensulfuron methyl; clomazone+pendimethalin; Clomazone, weed-infested control and weed-free control. The results showed that in weed-infested conditions, there was a significant difference in paddy yield between the two cultivation methods, so that in flooded cultivation, the yield was 355.6 and in direct cultivation, the yield was 185.1 kg per square meter. In direct cultivation, Kancil herbicide with a dose of 120 and 150 grams per hectare yields (492.5, 546) and Nomini herbicide with a dose of 200 and 250 cc per hectare (412.5, 539 3) and Clean Weed 65 cc. per hectare yield was 534.3 kg per square meter. It is suggested that direct cultivation of rice will be a good method for sustainable production in order to control weeds with herbicides and use less water and obtain optimal yield, considering the limited resources, especially water.  In order to investigate the effect of some herbicides with different doses in direct cultivation and comparing it with transplanted cultivation, an experiment was carried out in the form of split plots based on random complete blocks in three replications in Mazandaran in the spring of 2018. The main plots include  transplanted flooded rice and direct seeded rice and sub plots include Kancil herbicide with doses (150, 120, 90, 60, 30), Nomini herbicide with doses (250, 200, 150, 100, 50), Clean Weed with 65 doses; pertilachlor + bensulfuron methyl; clomazone+pendimethalin; Clomazone, weed-infested control and weed-free control. The results showed that in weed-infested conditions, there was a significant difference in paddy yield between the two cultivation methods, so that in flooded cultivation, the yield was 355.6 and in direct cultivation, the yield was 185.1 kg per square meter. In direct cultivation, Kancil herbicide with a dose of 120 and 150 grams per hectare yields (492.5, 546) and Nomini herbicide with a dose of 200 and 250 cc per hectare (412.5, 539 3) and Clean Weed 65 cc. per hectare yield was 534.3 kg per square meter. It is suggested that direct cultivation of rice will be a good method for sustainable production in order to control weeds with herbicides and use less water and obtain optimal yield, considering the limited resources, especially water.  https://ijfcs.ut.ac.ir/article_92008_d9d6344893c7d6d66a248dfd6bf6b6b5.pdf