Study of Legumes Trailed Combine Performance to Harvesting Rain-fed Chickpea

Legumes with more than 700 thousand hectares are the most important crops in the country. Currently, legumes have a mean consumption of 4.8 kg, although their consumption is lower than the average world (6.6 kg) and is 7.8 kg promising a head, but at the same time plays an important role in Feeding people. Harvesting grains and especially rain-fed chickpeas are often harvested manually and with great time and money because of lack of access to a suitable machine. Crop losses because of plant characteristics, farm conditions and nonconformity of machines with product conditions. Therefore, to assess complying the new ONER combine harvester imported from Turkey is important for the harvesting of rain-fed chickpeas. In this research, to perform a new combine harvester for rain-fed chickpea harvest in the fields of farmers in the region is studied and evaluated. Experiments were carried out in strip plot design with five repeats. The horizontal factor is combine speed, and vertical factor is variety. The test will be on the farmland and the minimum length of the plantations is 25-30 meters. The crop features that are measured and considered are: plant height, plant width, number of plants per hectare, 100 seed weight, height of the first pod of soil, and grain moisture content. Cropping density, harvest coefficient. The technical evaluation features are: harvesting rates in machine and hand harvesting; gathering and processing loss, quality losses, distance between threshing cylinder and concave, forward speed and drum speed, and combine capacity. The results show that minimum total combine loss is 4.37% in engine speed of 1500 rpm or 3-3.5 km/s traveling speed. Also, total harvest loss is 10.42%. Minimum quality loss is gained 4.88%. The results of economical features analysis show the cost of hand harvesting is 4.8 times more than combine harvesting. Annual income of combine harvesting is 84 and cost of it, is 249.69 million Rails. Finally the profit/cost ratio is 3.36 so mechanized harvesting using the chickpea combine have economical affect and its purchase price will be depreciated during two crop years.