Soil testing and fertilization indices for major grain and oil crops in Fujian Ⅳ.Correlation between soil test data and fertilization model

Based on a large number of field fertilization experiments on rice,sweet potatoes,potatoes and peanuts,fertilization models were established.Soil tests for alkali-hydrolyzable nitrogen,Olsen-P and available K were conducted for data to perform a regression analysis against these models.The results showed a correlation in an exponential function with F values reaching significant level.Thus,the established models were considered applicable in practice.