دراسة اقتصادية تحليلية لكفاءة استخدام أنماط الري الحديثة: دراسة ميدانية بمزارع منطقة القصيم

The study aims to estimate the efficiency of water resources use for irrigation at Al-Qassim farms by estimating the productivity and technical efficiency, under different irrigation methods (sprinkler and drip irrigation) used for the main crops which are included in the sample of study, and estimating the demand functions for resources used in the production of main crops. The analysis based on the Data Envelopment Analysis (DEA), in addition to Total Factor Productivity (TFP) and parametric programming. The DEA is used with the constant and variant returns to scale (CRS and VRS) to estimate the technical efficiency and scale efficiency of the considered crops under different irrigation methods. The study sample (consists of 124 farms) was selected from the farms at Al-Qassim region, Data collected by the personal interview through a questionnaire which was prepared for this purpose, the study sample were representative the most important field and vegetable crops at the study area. The most important findings of the study can summarize as follows: (1) By estimation the technical (TE) and scale efficiency (SE) for the field and vegetable crops at the study sample according to the concept of VRS and CRS under different irrigation methods, the results show the following: * According to CRS hypothesis the average technical efficiency (TE) under mobile sprinkler irrigation method were lower for farms of wheat, barley, winter tomatoes, corn, summer tomatoes and alfalfa, while results refers to improvement of (TE) for these crops according to VRS hypothesis. * The average of scale efficiency (SE), which is (SE=TECRS / TEVRS) amounted to about 0.91, 0.89, 0.90, 0.91, 0.90, 0.90 under the mobile sprinkler irrigation system for the farms of wheat, barley, winter tomatoes, corn, summer tomatoes and summer cucumber. * According to CRS hypothesis the average technical efficiency (TE) under drip irrigation method were lower for farms of zucchini, winter tomatoes, winter cucumber, summer potatoes, summer tomatoes and summer ...