INVESTIGATION ON HISTORICAL LESS- IRRIGATION MANAGEMENT METHOD UTILITY IN AGRICULTURAL PRODUCTION IN YAZD PROVINCE

Water is one of the important basements in the agricultural production. Shortages of water quality and quantities from the ancient in the kavir area of Yazd province caused utility of specific management method to increase profitability of irrigation .lessirrigation is one of the methods which has been used from the ancient . In this management method, its tried to maximize the profitability of pure profit due to unit volume of water, considering conditions and effective elements. Biography of agricultural activities in Yazd province shows that less-irrigation method was used for the old times in surface irrigation. This method mainly include providing the best planting pattern and agricultural activities such as vegetation density , fallow and alternation for using precipitation and storing humidity, changing plant time to shorten growth period, planting resistant and tolerable plants to drought. The quality of using this method in different parts of Yazd was studied. In Abarkooh to keep and preserve pistachio gardens, farmers take the latest water of wheat and irrigate pistachios. In Sadoogh to plant summer crops farmer use the latest water of wheat or barely. Investigation showed that using this method may increase profitability and exceeding valuation of whole agricultural productions, because agriculture is mixed of different activities.

کلیدواژه ها:

Historical study ، agriculture ، kavir ، less-irrigation (few-irrigation)