| Spatio-temporal change of agricultural production efficiency in the loess plateau |
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| DOI：10.7606/j.issn.1000-7601.2018.02.32 |
| Key Words: agriculture production efficiency DEA county the Loess Plateau |
| Author Name | Affiliation | | ZHANG Ping-ping | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | WANG Fei | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China | | WANG Lei-qin | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | YANG Meng | Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China |
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| Abstract: |
| The agricultural production efficiency change of 281 counties in the Loess Plateau was analyzed over 1987 to 2014 using Data Envelopment Analysis (DEA), taking the cultivated area, sown area of grain, rural employees, total power of agricultural machinery, and the amount of agricultural chemical fertilizers as input indexes, gross agricultural product, grain and oil output as output indexes. The results suggest that: (1) The average value of comprehensive efficiency was 0.694, which is on medium level, and keeps a moderate rate of growth, but the regional difference is larger. The coefficient of variation of high value (V>0.250) located in some counties in the northern and eastern parts of the Loess Plateau. (2) The variation of pure technical efficiency was divided into three basic types according to the calculation. The number of counties with high value due to pure technical efficiency increased, and there are more such kind of counties from the south to the north. Comprehensive efficiency affected by both pure technical efficiency and scale efficiency, and pure technical efficiency has more contributed to the comprehensive efficiency than the scale efficiency. (3) The scale efficiency value was greater than 0.9 in the entire area with a high scale efficiency and the better balance in distribution. Most counties were in the stage with increasing scale returns in the Loess Plateau in 2005 to 2014, and it is still possible to get higher production efficiency by expanding the scale of agricultural production. |
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