Improvement and Application on Soil Tension Meter with Negative-pressure Mercury
Si Liu · Xibei nongye xuebao · 2002
The least number can be seen is 1.00 mm Hg column (13.6 mm water column) in Soil tension meter with negative pressure mercury. Soil complex tension meter′s the least number is 1.00 mm water column by improving on soil tension meter with negative pressure mercury, the sensitivity of complex tension meter increase 13.6 times than tension meter. The flow of soil water was determined in field by two sites replaced one site, the result can directly show difference between two assaying sites, and judge trend of soil water movement. Meantime soil complex tension meter is good and exactness at temperature dependence.Soil complex tension meter can apply some parameters of soil water movement although exact assaying difference between soil flow of water, for example soil dissipating amount, soil non saturation conductivity.