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基于相位检测原理的TDR土壤电导率测量研究（Research of Soil Conductivity Measuring Technique with TDR Based on Phase Detecting Principle）
土壤 电导率 盐分 时域反射
2010/12/29
介绍了基于相位检测的时域反射（P-TDR）技术的工作原理。对8种不同盐分含量的砂壤土土样在5个含水量水平下进行实验，结果显示，信号的反射系数随电导率增加单调减小。分别采用线性和二次多项式对测量结果进行建模实验，并选择二次多项式为P-TDR电导率测量模型，模型的决定系数达0.812以上。土壤含水量对电导率测量有较大影响，在分析了土壤含水量与多项式系数关系的基础上，最终建立了以土壤含水量和反射系数为变...
Research of correlation between electric soil conductivity and yield based on the use of GPS technology
soil electric conductivity precision farming soil properties geostatistic
2014/2/27
A contact method was used for the continuous measuring of soil electric conductivity using a six disc electrodes apparatus. The placement of the electrodes was chosen on the basis of the depth of the ...