The Improvement and Application of Projection Pursuit Model in Agricultural Water and Soil. Resources Sustainable Utilization

On the basis of comprehensively analyzing coordinative relations between agricultural water and soil resources-grain production complex system, use DPSIR index system conceptual model to establish agricultural water and soil resources sustainable utilization evaluation index system. To solve the problem of the complexity of the evaluation process caused by excess evaluation indexes, the two models can be combined, Principal Components Analysis model which has the characteristic of effectively solve multi correlation among indexes and Projection Pursuit model which has a efficient dimension reduction technology, then we put forward Projection Pursuit Principal Components Analysis model. Finally, through the applying of this model to the research of sustainable utilization evaluation of agricultural water and soil resources on Jiansanjiang state farms of Sanjiang plain in china, we not only get the satisfactory results, but also provided a new research idea and method for sustainable utilization evaluation research of agricultural water and soil resources.