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Hossein Ebrahimnezhad; Ali Keramatzadeh; Farshid Eshraghi; azam rezaee
Abstract
One of the important problems in the agricultural sector of Iran is the low productivity of inputs, especially water. In this study, in addition to determining the physical and economic productivity of water, the factors affecting these productivities in the production of orange in Ghaemshahr County ...
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One of the important problems in the agricultural sector of Iran is the low productivity of inputs, especially water. In this study, in addition to determining the physical and economic productivity of water, the factors affecting these productivities in the production of orange in Ghaemshahr County of Mazandaran Province were also investigated. For these purposes, three indexes of water use productivity including crop per drop (CPD), Gross benefit per drop (BPD), and net benefit per drop (NBPD) were used. Also, regression analysis was used to investigate the factors affecting water productivity. Necessary information was collected by completing 162 questionnaires from gardeners in the study area in 2018-19. Data analysis was also performed using Eviews7 software. The results of the analysis of water productivity indices showed that the average CPD index for orange was 6.9 kg /m3, BPD index was 47500 Rials and NBPD at three interest rates of 10%, 12%, and 15% was 29000, 28000, and 26600 Rials, respectively. Well’s discharge rate, days when wells were used, time spent for irrigation, the number of irrigations, age of trees, the distance between the trees, age of trees, cost of pesticide, and cost of fertilizer were the factors affecting water productivity. Among the mentioned variables, the variable of “time spent for irrigation” had the greatest effect on the physical water productivity, through the effect on the amount of irrigation water. Due to the negative effect of well discharge rate, the number of irrigations, and time spent on irrigation on the economic productivity of water, it is recommended to irrigate the orange trees in accordance with their needs and in a way that less water is applied.
z g; f e; a k
Abstract
Water pricing is one of the most important economic tools for increasing water demand management in the agricultural sector. In this regard, the purpose of this study, was to determine the economic value of agricultural water from the perspective of demand by using production function approach in wheat ...
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Water pricing is one of the most important economic tools for increasing water demand management in the agricultural sector. In this regard, the purpose of this study, was to determine the economic value of agricultural water from the perspective of demand by using production function approach in wheat for Gorgan County, in 2012-13. In this study, flexible and inflexible functions were used. After estimating these functions, Cobb-Douglas function was chosen as the best production function. Water economic value calculated for wheat crop was 1564.5 Rials per cubic meter. Also, the price elasticity of demand for these products was calculated. According to the results, the absolute price elasticity of water demand for wheat was estimated at 1.28, which is larger than unity and shows that price policies can be an important factor in the control of non-optimized consumption of this valuable input.
F ESHRAGHI; S GHASEMIAN
Abstract
Water is one of the most important resources in agriculture. Its scarcity and low irrigation performance in Iran makes it more important. In this study, economic productivity of water use in Golestan province was evaluated for selected irrigated crops including cotton, canola, summer soybean, and rice. ...
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Water is one of the most important resources in agriculture. Its scarcity and low irrigation performance in Iran makes it more important. In this study, economic productivity of water use in Golestan province was evaluated for selected irrigated crops including cotton, canola, summer soybean, and rice. To this end, the gross benefit per unit water use was determined as an index. Furthermore, a new approach in ranking and evaluating the regional productivities was adopted. The results showed that the highest economic productivity in water use of irrigated cotton in Gonbad-e-Kavous was 13496 Toman/m3, irrigated canola in Ag-Ghala with 562 Toman/m3, irrigated summer soybean in Minudasht with 394 Toman/m3, high yield long seed rice in Minudasht with 2108 Toman/m3, high yield rice in Ali-Abad with 988 Toman/m3, and medium yield long seed rice in Kolaleh with 960 Toman/m3. Based on the results, Minudasht, Kalaleh, and Aliabad regions had the highest overall economic productivity in water use, while Gonbad-e-Kavous, Kordkuy and Azadshar regions had the lowest.