Results 301 to 310 of about 309,903 (363)

Variability of soil water tension and soil water content

Agricultural Water Management, 1990
Abstract The objective of this study was the variability in soil water tension and in soil water content in a field soil. A transect was established with 91 positions, 1 m apart. Soil water content was measured 16 times at 0.3 m depth before and after flooding of the transect. Soil water tension was measured 13 times after flooding.
J.M.H. Hendrickx, P.J. Wierenga, M.S. Nash   +2 more
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SOIL-WATER CONTENT DEPENDENCY OF WATER REPELLENCY IN SOILS

Soil Science, 2007
Water repellency (WR) of soils is a global phenomenon. It affects hydrological processes such as infiltration, preferential flow, and surface erosion. Although the soil WR varies nonlinearly with soil-water content (w), WR is often determined at one fixed soil-water content. For a coarse sandy soil, we provide a comparison of the whole WR-w curve under
Lis W. de Jonge, Per Moldrup, Ole H. Jacobsen   +2 more
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Key soil water contents

2004
Publisher Summary This chapter studies critical components of a physics-based approach to define several characteristic points on the water retention curve. The idea is to find segments of the water retention curve at which the forces causing water retention have distinctly different physical natures and wet soil has distinctly different rheological ...
E. Shein, A. Guber, A. Dembovetsky
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WATER CONTENT AND SOIL STRENGTH

Journal of Soil Science, 1960
Summary The strength of beds of soil aggregates, saturated and unsaturated, has been measured with a ring shear machine. For saturated loose soil with free drainage the cohesion and friction components and, therefore, total strength are proportional to the applied normal load. When sheared under load the soil compresses to an ultimate
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Effects of Soil pH and Soil Water Content on Prosulfuron Dissipation

Journal of Agricultural and Food Chemistry, 2002
The sulfonylurea herbicide prosulfuron, 1-(4-methoxy-6-methyltriazin-2-yl)-3-[2-(3,3,3-trifluoropropyl)phenylsulfonyl]urea, is used for the selective control of broadleaf weeds in corn, sorghum, and cereal grains. To investigate its fate in soils, this study examined the effects of soil pH and water content on the rates of dissipation processes and the
Ryan P, Hultgren, Robert J M, Hudson, Gerald K, Sims   +2 more
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Measurement of soil water content

Remote Sensing Reviews, 1990
(1990). Measurement of soil water content. Remote Sensing Reviews: Vol. 5, Instrumentation for studying vegetation canopies for remote sensing in optical and thermal infrared regions, pp. 263-279.
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Soil Permeability As a Function of Vegetation Type and Soil Water Content

Health Physics, 1994
Soil permeability is important for estimating the rate of mass transport of 222Rn through soils and into basements (Nazaroff 1992). We measured permeability and soil water content on a set of nine plots consisting of three plots vegetated with common barley (Hordeum vulgare), three plots vegetated with Russian thistle (Salsola kali), and three bare ...
R C, Morris, L, Fraley
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