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An Improvement of the Specified Method of soil Neutron-probe Gauge in Determining Soil Moisture in Dryland

Guo Hongfci Xiong Yunzhang(Department of Water Conservancy and Architectural  
This paper reports the direct spccifficd method by using the neutron-probe to determine soil moisture in the Held: the multiple point specification and the mean value grading retrogression method of soil moisture contents (weight %).Thc correlation cocfllcicnt of curve equation specified by adopting this method reaches 0.99304.Soil moisture rcsponcs scope is 10%-20.69%.This method may raise accuracy of specification curve and adapt to the changing scope of soil moisture, lhus,achicving the successful specification of neutron-probe ga-ugc.Thc greatest difference value reaches 0.0198 through comparison'by taking soil samples in actual determination. The method has been tested in the Irrigation Research Laboratory of Water Conservancy Department of Northwestern Agricultural University.
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