Results 251 to 260 of about 1,838,131 (293)

Soil Hardness Measurements in Relation to Soil Moisture Content and Porosity

Soil Science Society of America Journal, 1952
Abstract A method of adjusting penetrometer measurements so as to express soil porosity conditions is presented. The best simple function giving high correlations with macroporosity in the Decatur clay and the sandy clay subsoil of Greenville fine sandy loam was log (ϑH 1/2 )
V. C. Jamison, H. A. Weaver
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Porosity and Soil‐Water Diffusivity Relations

Soil Science Society of America Journal, 1963
Abstract Water at −2mb pressure was absorbed by horizontal columns of three soil materials of differing texture each at three porosities, each porosity in duplicate. The soil materials were Adelanto loam, Pachappa loam, and Pine silty clay.
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Quantitative estimation of soil total porosity and macro‐porosity as part of the pedological description

New Zealand Journal of Agricultural Research, 1965
Abstract For 35 New Zealand soil samples of varied origin, estimates of total porosity and macro‐porosity group were compared with measurements of these properties in an endeavour to judge the feasibility of making such estimates as part of the pedological field description. The estimates of total porosity group were
D.C. McDonald, R. Julian
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The porosity of soil aggregates from bulk soil and from soil adhering to roots

Plant and Soil, 1985
Total porosity and pore-size distribution (p.s.d.) were determined in soil aggregates taken in plots planted with maize and treated with farmyard manure and three rates of compost. Soil aggregates were collected from the soil adherent to the maize roots (root soil aggregates) and from bulk soil (bulk soil aggregates).
G. Guidi, G. Poggio, G. Petruzzelli
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The relation between soil infiltration and effective porosity in different soils

Agricultural Water Management, 1993
Abstract A field study was conducted to examine the relationship between in situ steady state infiltration rate (IR) and some textural and structural soil properties. The textural variables (clay %, silt %, and clay plus silt) showed weak correlations with the IR compared to the structural [total porosity, effective porosity (EP), and bulk density ...
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Hydraulic Conductivity Related to Porosity and Swelling of Soil

Soil Science Society of America Journal, 1969
Abstract The hydraulic conductivity factor in Darcy's equation for viscous flow is analyzed in terms of a modified Kozeny equation. The modifications include a correction for swelling, and the replacement of the cubic exponent of the porosity term by an exponent varying between 0 and 3.
J. V. Lagerwerff, F. S. Nakayama, M. H. Frere   +2 more
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Comments on Soil Porosity

Soil Science Society of America Journal, 1982
J. A. McKeague, G. C. Topp, C. A. Fox
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Soil Density and Porosity

2007
M Cater, G Parkin, J Culley, X Hao, B Ball   +4 more
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Effect of Siderate Crops on Soil Volume and Porosity

American Journal of Applied Science and Technology
This article is devoted to the current issues of increasing soil fertility. All over the world, measures are being developed to effectively use green manures, increase plant biomass, and increase the demand for soil fertility. Green manures are of great importance in enriching the soil with organic matter and thereby improving the physical properties ...
Bakhrom Kholboev, Norboy Japakov, Kamoliddin Fayziev, Nasiba Esanbaeva, Muslim Alibekov   +4 more
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Optimizing soil moisture for plant production: The significance of soil porosity

2016
This publication discusses the processes above, within and below the soil that enable water to move and crops to grow, and is intended to help land users make better use and take better care of these basic resources. The document will contribute to raising awareness of possibilities for better use of rainwater and improved management of soils.
Shaxson, F., Barber, R.
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