Saeid Yazdani; Aboalfazl Mahmoodi; GholamReza Yavari; GholamReza Yavari; MohammadReza Nazari; Mehrnoosh Mirzaei
Volume 6, 23(2) , September 2016, , Pages 98-89
Abstract
Due to increasing demand and supply gap of water and reclamation plan and balance of groundwater resources by the Department of Energy It is expected to reduce water resources , regardless of the agricultural sector , Excessive pressure on the sector in the future through rations and water from reallocation ...
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Due to increasing demand and supply gap of water and reclamation plan and balance of groundwater resources by the Department of Energy It is expected to reduce water resources , regardless of the agricultural sector , Excessive pressure on the sector in the future through rations and water from reallocation of resources to sectors with higher priority enters this section. In this study, the effects of In this study, the economic effects of nonprice policy reduced water supply on the components of the agricultural sector in the province of Qazvin According to the data of the crop year 93-92 and by developing a positive mathematical programming model is investigated. The results showed that , with the policy of reduce water availability , crop patterns are highly impressed And more driven towards products that make water use more than economic efficiency. With increasing restrictions on water resources, increased economic efficiency water This suggests that the increasing scarcity of water resources and the signal value to agricultural producers To allocate water more economically valuable products in terms of lack of water resources.
Abolfazl Mahmoodi; Aboozar Parhizkari
Volume 5, 17(3) , December 2015, , Pages 40-25
Abstract
In this study, climate change impact on product yield and farmer's gross profit of Qazvin plain were studied. In this regard, first the trend of variables of temperature and precipitation changes during 1991-2011 were reviewed. Then, using regression analysis effect of temperature and precipitation variables ...
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In this study, climate change impact on product yield and farmer's gross profit of Qazvin plain were studied. In this regard, first the trend of variables of temperature and precipitation changes during 1991-2011 were reviewed. Then, using regression analysis effect of temperature and precipitation variables on yield and acreage of wheat, barley, corn, canola, tomatoes, beets and alfalfa was investigated. Then, by entering the results of regression analysis in the positive mathematical programming model, the scenario of one degree increase in temperature and one mm decrease of rainfall on crop yield were analyzed. Results of regression analysis showed that during the study period, the increase in temperature and the decrease in precipitation. Also, results of regression analysis showed that changes in temperature and precipitation in Qazvin plain has a significant effect on products yield. Results of PMP model showed that with one degree increase in temperature and one mm decrease of rainfall, the yield of barley, corn, beet and alfalfa respectively 15, 24, 13 and 17 percent increase and the yield of wheat, tomatoes and canola respectively 29, 20 and 23 percent decrease. Also, farmer's gross profit compared to the base year 10/5 percent increases. In the end, due to prematurity of climate change in regional planning, to increase agricultural production in the Qazvin plain it was proposed that the first it should be considered the performance improve operating in per unit area (ha) and development the under cultivation of crops such as corn, beet and alfalfa be placed at the next priority.
