hygroscopic water

hygroscopic water

[¦hī·grə¦skäp·ik ′wȯd·ər]
(hydrology)
The component of soil water that is held adsorbed on the surface of soil particles and is not available to vegetation.
References in periodicals archive ?
The percentages of OM in the biomass samples were found by the amount of ash at 850[degrees]C [16] and hygroscopic water [17], and for the oil shales by ash of the acid-treated samples counting the contributions of hygroscopic water and pyrite.
5 percent for Test 1 is the hygroscopic water content, the lowest value possible without oven drying.