Based on "Double Powers Exciting Method" and ANN technique, the moisture and the available clay content of green sand can be calculated quickly by the system.
本文基于“双电源二次激励法”的基本原理，并利用人工神经网络技术求得型砂含水量及有效粘土含量。
Quaternary red clay total nitrogen content was highest, but the available nitrogen content was lower than Granite soil and Purple sandy shale soil.
第四纪红土土壤全氮含量较高，但是其碱解氮含量比花岗岩母质土壤和紫色砂页岩土壤低。
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