Estimation of soil moisture status using near infrared reflectance
Estimation of soil moisture status using near infrared reflectance
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DOI：
10.1002/hyp.3360050312
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发表时间：
1991-07
影响因子：
3.2
通讯作者：
W. R. Whalley;P. Leeds-Harrison;G. E. Bowman
中科院分区：
文献类型：
--
作者：
W. R. Whalley;P. Leeds-Harrison;G. E. Bowman
本文介绍了一种近红外反射率测量仪的原理及其在土壤含水量测量中的应用。该仪器是从一种用于估计饲料含水量的仪器发展而来的，它是基于对波长为1450 nm（强吸水带）和1300 nm（弱吸水带）的红外光反射率的测量。给出了纯砂和砂/粘土混合物的反射率和反射率比与含水量的校准曲线。突出了与使用这种技术对膨胀土的含水量的测量相关的问题。使用修改后的形式，该仪器估计土壤水分状况在外地进行了讨论。
The use of a prototype near infrared reflectance meter for estimating the water content of soil is described. The instrument, developed from one used for estimating the water content of forage is based on the measurement of reflectance of infrared light emitted at wavelengths of 1450 nm, a strong water absorption band, and 1300 nm a weak water absorption band. Calibration curves of reflectance and reflectance ratio versus moisture content for pure sands and sand/clay mixes are presented. Problems associated with the measurement of moisture content using this technique on swelling soils are highlighted. The use of a modified form of this instrument for estimating soil moisture status in the field is discussed.