Study and development of spectral responsibility testing system for visible-near infrared band

This paper introduces mainly the structures and the functions of the instrument for analyzing rapidly soil composition based on spectral measuring techniques. This measuring system can be used to measure soil spectral properties with a response range from 400 to 2900nm. The main technical problems emphasized on measuring accuracy and stability of system were solved. On the basis of these, we studies the reflective spectrum of soil moisture and evaluates primarily the repeatability and stability of the system in the practical measuring. The testing results show that the system has good qualities of stability and easy operation.