Compare the Amount of Canola Losses in Harvest Time with Three Types of Head

Canola is an most important non-cereal plants for the production of the oil and has become the main oilseed crops in Iran for recently years. Losses of canola seeds which occur in each level of canola production, especially in harvesting level. The first objective of this research was compare of harvester head in Iran. 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). Minimum losses occur in harvesting with Austrian head and losses by Iranian head was 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.