| The spectrophotometer ASDFR2500 and spectroscopic techniques were applied for field mensuration to evaluate the soil parameters with the undisturbed soil samples collected in Xiaotangshan. Correlation and regression analysis was conducted to describe the relationship of soil spectral reflectance with soil moisture, SOM, NO-3-N, EC and pH, respectively. The results showed that all these soil parameters could be well evaluated by A value (the logarithm of reciprocal of reflectivity) by using linear regression models. These models would be available for evaluating and predicting soil parameters by spectrum reflectance, and would provide guidance to the management of soil nutrients and the prediction of fertility in precision agriculture. |