中文摘要：

以偃师市为例，运用GIS和多元统计分析方法，采用施肥试验中的最高单产为统一衡量标准，研究了市、县2级评价结果的尺度效应问题。结果表明，市、县2级评价的综合得分与小麦、玉米2种作物的最高单产之间有显著线性相关关系；偃师市耕地地力评价结果与洛阳市评价结果空间一致性达到68．43％。2级评价中，同一指标的隶属函数不同、数据处理方法不同和评价指标体系不同是引起评价尺度效应的主要原因；市级尺度的灌溉类型和县级尺度的质地和质地构型指标是造成尺度效应的关键因素。

英文摘要：

Taking Yanshi County as an example, this paper studied scale the effect of evaluation re- suits at the city and county level, using GIS and multivariate statistical analysis method and the maxi- mum yield in fertilization experiment as the measuring standard. The results showed that there existed a significant linear correlation between comprehensive evaluation scores at the city and county level and the highest yields of wheat and corn; farmland productivity evaluation results in Yanshi County and Luoyang City reached a level of 68.43% ; the different membership functions of one indicator, differ- ent data processing methods and evaluation index systems were the main reasons causing the scale effect; and irrigation type was the key factors of scale effect at the city level with texture and texture configuration at the county level.