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(2) The experimental results also show that frequency has an important effect on the measurement of electrical parameters. As the frequency increases, the resistance, capacitance, and impedance decrease. In addition, at high frequencies, the electrical properties of loess are basically not affected by temperature. Therefore, using a frequency of 100 Hz is more advantageous to study the variation law of the electrical properties of loess.The total contents and chemical speciation analysis of Zn, Cu, Pb, Cr, Mn, Ni, Cd, and As in pig manu
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