Results 161 to 170 of about 1,946,919 (207)

Impact of long‐term sub‐soiling tillage on soil porosity and soil physical properties in the soil profile

Land Degradation & Development, 2021
AbstractLong‐term conventional tillage leads to soil compaction and formation of a plough layer, which affects soil physical properties, transport of water, and growth of crop roots toward deeper soil, resulting in soil degradation and a decline in crop productivity.
Yonghui Yang, Jicheng Wu, Shiwei Zhao, Yongping Mao, Jiemei Zhang, Xiaoying Pan, Fang He, Martine van der Ploeg   +7 more
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CP of Steel in Soil: Temporospatial pH and Oxygen Variation as a Function of Soil Porosity

CORROSION 2021, 2021
Abstract This paper documents an investigation of pH variations in water saturated sandy soil with steel samples under impressed current cathodic protection (CP). The aim of this work was to evaluate the temporal and spatial variation in pH and oxygen under different protection current density and different soil porosity ...
Martinelli-Orlando, Federico, Angst, Ueli   +1 more
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Predicting Porosity of Fired Soil Aggregates

Journal of Transportation Engineering, 1984
The porosity of preformed fired soil aggregates for pores larger than 0.05 μm in radius (POR), which mainly determines the potential of bitumen absorption, cannot be successfully correlated to a single soil property. Multiple regression analysis shows a significant correlation of aggregate porosity POR with the following soil parameters: diameter ...
Alamgir M. Hoque, Jose G. Cabrera
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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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Soil Gas Permeability as Influenced by Soil Gas‐Filled Porosity

Soil Science Society of America Journal, 1992
Abstract The need to characterize the fundamental gas flow properties of soils has taken on new significance in recent years with the advent of induced soil venting as a remediation technique for contaminated soils.
Kevin P. McCarthy, Kirk W. Brown
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CHANGES IN SOIL POROSITY IN REMOLDED SOILS TREATED WITH POULTRY MANURE

Soil Science, 1987
We studied the modification induced in soil porosity, pore shape, and pore-size distribution in three soils of different textures treated with a poultry manure in laboratory trials, and we tested the effect of wetting and drying cycles. Porosity measurements were carried out on soil thin sections by using the electrooptical image-analysis (Quantimet ...
M. PAGLIAI, M. LA MARCA, G. LUCAMANTE
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Influence of soil porosity on water use in Pinus taeda

Oecologia, 2000
We analyzed the hydraulic constraints imposed on water uptake from soils of different porosities in loblolly pine (Pinus taeda L.) by comparing genetically related and even-aged plantations growing in loam versus sand soil. Water use was evaluated relative to the maximum transpiration rate (E crit) allowed by the soil-leaf continuum.
U G, Hacke, J S, Sperry, B E, Ewers, D S, Ellsworth, K V R, Schäfer, R, Oren   +5 more
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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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Effects of Drying Treatments on Porosity of Soil Materials

Soil Science Society of America Journal, 1985
Abstract The effects of three drying techniques on total porosity and pore size distribution of soil materials were studied by Hg intrusion porosimetry. The three soils investigated had different clay contents (21%, 35%, and 44%), but the clay fraction of each was dominated by montmorillonite.
Michael L. Thompson, John F. McBride, Robert Horton   +2 more
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