When scientists analyzed fresh yacon tuber, they discovered the tubers consist of 69 to 83 percent moisture, 20 percent sugars (mostly inulin) and 0.4 to 2.2 percent protein.

It also discusses the variation law of mechanics feature of soil mass under different percent moisture content condition and makes initial analysis on the stability of floodplain and embankments.

With improvement of aeration, infiltration and drainage percent, the availability of moisture soil increases corresponsively.