en public specific orginal article <ul style="list-style-type:circle;"> <li style="text-align: justify;">Herbicide plays the main role in guaranteeing the quantity and quality of food. Soybean reactive oxygen species scavenging system eliminates the herbicides&rsquo; side effects on the plant by activating antioxidant enzymes, which affects the yield. So, we investigated this procedure to reveal the effect of herbicides on food production. <strong>Methods:</strong> Experiments were carried out in two locations of Alborz province in 2014 during the growing seasons. Seven different tank-mixed herbicides were produced by mixing one triple mixture of imazethapyr+bentazon+sethoxydim active ingredient, three double mixture of imazethapyr+bentazon, imazethapyr+sethoxydim, and bentazon+sethoxydim, as well as single usage of imazethapyr, bentazon, and sethoxydim. Reduced herbicide rates were 100, 60, and 30% of the recommended dosage inducing soybean plots through leaf expanding phase. <strong>Results:</strong> Both herbicides and their reduced rates changed soybean yields through antioxidant enzymes&rsquo; activity. Maximum soybean yield was registered at tank-mixed imazethapyr+bentazom+ sethoxydim which were induced at 33, 320, and 125 g active ingredient/hectare, respectively. The minimum activity of enzymes (superoxide dismutase 3.9 international unit) was also demonstrated in this research. Our data showed that when the herbicide rate was reduced from 100% to 30%, as a result, the label recommended soybean yield was reduced by just 17%, while superoxide dismutase activity was reduced too. The minimum yield was 1.2 ton/hectare of sethoxydim with 225 g active ingredient/hectare^.<strong>Conclusion: </strong>Antioxidant enzymes were promoted to maximum activity by increasing the herbicide rate for scavenging the herbicide side effects. Tank-mixed herbicides, with reduced herbicide rates can eliminate poison residue in the environment and food chain while increasing weed control.</li> </ul> <div style="text-align: justify;">&nbsp;</div> Reduced Rates, Herbicide, Tank-Mixed, Soybean, Enzyme 248 258 http://jnfs.ssu.ac.ir/browse.php?a_code=A-10-209-1&slc_lang=en&sid=1 Sina Fallah Tafty 0000-0002-1865-215X No Department of Agronomy, Khuzestan Science and Research Branch, Islamic Azad University, Ahvaz, Iran Shahram lak 0000-0001-8657-1178 No Department of Agronomy, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran Mani Mojaddam manimojaddam@yahoo.com 0000-0002-1925-5279 Yes Department of Agronomy, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran Ahmad Naderi 0000-0002-6430-456X No Department of Agronomy, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran Mohammad Abdollahian-Noghabi 0000-0002-3523-9586 No Agricultural Research, Education and Extension Organization, Tehran, Iran