جستجوی مقالات مرتبط با کلیدواژه "drip irrigation" در نشریات گروه "اقتصاد کشاورزی"

This study aimed at evaluating the yield of grapes per unit area in two methods of drip irrigation and traditional irrigation using two models of Bisaliah and Logit models and analyzing some of the economic, managerial and environmental factors affecting the adoption of drip irrigation among grape producing farmers in Zabol County of Iran. The required information was obtained using a questionnaire completed from 197 grape farmers in the studied area through a random stratified sampling and library documents. The results from the Bisaliah model showed that the use of drip irrigation had two direct and indirect effects on the increase of grape yield; in case of direct effect, without changes in inputs, the yield per unit area increased by 24.14 percent and indirectly, with a change in inputs, the yield per unit area increased by 4.35 percent. In general, the use of drip irrigation in vineyards caused 28.5 percent change in yield (kg / ha). Also, the results from the Logit model indicated that the variables of farmer’s age, number of family labor and access to water had negative effects on the adoption of drip irrigation. It was also determined that variables such as farm area, level of literacy, farmer's occupation, land slope, farmer's income, type of land use, educational and extension classes, and availability of credits and facilities had positive and significant effects on the adoption of drip irrigation.

Optimum use of water is very important for agricultural development.The purpose of this research was private economic analysis(determination of profitability for single orchardists) of transforming flood irrigation system to drip irrigation in Urmia county apple orchards. Necessary data were collected by interviewing and completing the questionnaires. Using investment economic evaluation methods and Excel Software five orchards with different ages of 15,17,20, 22 and 23 years for two cases of with and without irrigation transformation were evaluated. Results showed that net present value and cost benefit ratio in every five orchards in the case of drip irrigation were higher than in the case of flood irrigation. The results of sensitivity analysis showed that in each five orchards 10 percent decrease in income in comparison with 10 present increase in cost decreased net present value and cost benefit ratio and internal rate of return more but NPVs did not become negative; and with the increase of discount rate up to 30 percent net present value remained positive; but in comparison with two previous cases had higher decrease. In conclusion it should be mentioned that the results of this study shows that the profitability of apple production would be higher if drip irrigation system is used at the lower age; and would have the highest profitability if drip irrigation is used from the start of establishing the orchard.