The soil moisture content can also be expressed in percent of volume. Moisture that is left in the soil, along with hygroscopic moisture and water vapour, after the gravitational water has drained off.

Soil water can be further sub-divided into three categories, 1) hygroscopic water, 2) capillary water, and 3) gravitational water. Approximately a 10-15 gram sample portion of the fraction passing the 2. with a depth of 1 m, and a surface area of 1 m 2 ) contains 0.150 m 3 of water (e.g.

The hygroscopic and capillary waters are in equilibrium with the soil under given condition.

Hygroscopic water is found as a microscopic film of water surrounding soil particles. Hygroscopic moisture content of fine-grained soil represents the water adsorbed by the negatively charged clay platelets when the oven-dried soil is exposed to an atmosphere with different levels of humidity, which is a variable.

However, there appears to be no … Guy Sela. Dark soils, irrespective of moisture content, absorb more heat than do the more reflective light-color soils (Oke, 1987).Soils of higher moisture content, being darker, absorb more solar radiation (Fig. Hygroscopic moisture definition is - moisture held firmly as a film on soil particles and not responding to capillary action. Capillary moisture is held by surface tension (known in the US as ‘water potential’) as a film of moisture on the surface of soil particles and peds, and as minute bodies of water filling part of the pore space between particles. Soil water content. Soil water is the water that is immediately available to plants. Color influences the rate of soil warming in the spring and cooling in the fall.


All such spaces in the soil are collectively called pore space. ty n. or adj tending to absorb water from the air... Hygroscopic - definition of hygroscopic by The Free Dictionary . Loading... Unsubscribe from Agricultural Engineering Telugu? with a depth of 150 mm = 0.150 m and a surface area of 1 m 2 ). Hygroscopic moisture content has been linked with many clay mineralogical parameters in predictive geotechnical engineering. Water is held in soil in the pores between the soil particles, therefore the maximum amount of water that a specific soil can potentially hold is equal to its porosity (total volume of pores).

In the example above, 1 m 3 of soil (e.g. There are three main types of soil water - gravitational water, capillary water, and hygroscopic water - and these terms are defined based on the function of the water in the soil. Deliquescence may be considered an extreme form of hygroscopy.