The experimental doses of the herbicides CALLISTO 480 SC + ATPLUS 463 and BASAGRAN SUPER were 0.25; 0.1875 and 0.1251 ha-1 and 2.0; 1.5 and 1.01 ha-1, respectively. The efficiency of herbicides and their killing effect on Amaranthus retroflexus were estimated by means of the apparatus PS1 ...