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The Effect of Entrapped Air on the Quasi-Saturated Soil Hydraulic Conductivity and Comparison with the Unsaturated Hydraulic Conductivity

A. Sakaguchi, T. Nishimura* and M. Kato

Department of International Environmental and Agricultural Sciences, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho, Fuchu 183-8509, Tokyo, Japan


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  		Fig. 1. Schematics of soil sample saturation.

 


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  		Fig. 2. Quasi-saturated hydraulic conductivity of the Masa sandy loam as a function of entrapped air content ({rho}b = 1.52 g cm–3).

 


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  		Fig. 3. Quasi-saturated hydraulic conductivity of the TUAT andisol as a function of entrapped air content ({rho}b = 0.82 g cm–3).

 


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  		Fig. 4. Effect of dry bulk density on the quasi-saturated hydraulic conductivity of the Masa sandy loam.

 


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  		Fig. 5. Effect of dry bulk density on the quasi-saturated hydraulic conductivity of the TUAT andisol.

 


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  		Fig. 6. Relation between the completely saturated hydraulic conductivity (K0) and the parameter n in Eq. [1].

 


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  		Fig. 7. Quasi-saturated and unsaturated hydraulic conductivities of the Masa sandy loam.

 


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  		Fig. 8. Quasi-saturated and unsaturated hydraulic conductivities of the TUAT andisol.

 


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  		Fig. 9. Water retention curve of the Masa and TUAT soils.

 




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The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 2005 by the Soil Science Society of America.