Determination of canola losses in harvest operation with three types of heads

Ilseed crops have become a major industry in Golestan, Iran. However, these crops are not grown without risk. Proper management tools are essential to minimize potential risks and ensure maximum profits for farmers. This study aims to determine canola losses in harvest operations with three types of head. Losses of canola seeds occur in each level of canola production especially in harvesting level. In Harvesting time canola pods separated from center line and canola seeds fall on the ground. Rapeseed harvest was by three types of head (Ordinary head, Iranian head, Foreign (Austrian) head) losses of harvest by ordinary head was higher than other (195 to 254 (kg h^-1)). Minimum losses occur in harvesting with Austrian head and losses by Iranian head were between two types of head. The vertical cutter bar have an decrease impact on canola losses this cutter bar has best Performance in Austrian head and reduce losses which occur in part three of head. Losses of canola seeds determine with Hobson trays.