evaluation of different cultivators' performance to control of weeds in sugar beet cultivation

in order to comparison of weeds mechanical control for sugar beet, a rotary cultivator was designed and constructed in first year, and compared with other mechanical control in second year. five treatments, included: rotary hoe cultivator, furrower cultivator, rotary cultivator, no weeding and manual weeding were compared. experiment design was random complete blocks design (rcbd) with three replications. there was not any significant difference between treatment aspects of weeds frequency before weeding in level five percent also there wasn't any significant different between manual weeding and rotary cultivator treatment inspect of weeding efficiency after weeds control. there was significant different between furrower and rotary hoe cultivators in aspect of weeding efficiency after controlling of weeds. average field capacity for cultivators was 0.75 ha/h. in aspect of economical considerations, furrower cultivator and manual weeding had the highest and least final efficiency respectively. so, treatments were ranked from furrower cultivator, rotary cultivator, rotary hoe cultivator and manual weeding respectively.