Effects of different particle sizes on the spectral prediction of soil organic matter

Abstract Soil organic matter (SOM) is an important criterion for soil quality. The rapid determination of SOM can provide basic data support for the implementation of precision agriculture. Although the spectral reflectance has been used to rapidly obtain the SOM content, the method is not convenient to comparisons between different research results because the selection pretreatment criteria are not the same for soil samples. In this study, soil samples were prepared with six different standards of