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A synthetic urease-mimetic catalyst for wind erosion control via carbonate precipitation. [PDF]
Sci RepDehghani A +4 more
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Histopathology of Rhizoctonia root and crown rot of sugar beet reveals differential responses in susceptible and resistant cultivars to invasion by Rhizoctonia solani AG 2-2. [PDF]
Ann BotMinier DH, Hanson LE.
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Effect of Penetration Rate on Cone Penetration Resistance in Saturated Clayey Soils
Journal of Geotechnical and Geoenvironmental Engineering - ASCE, 2008In this paper, the effects of penetration rate on cone resistance in saturated clayey soils are investigated. Shear strength rate effects in clayey soils are related to two physical processes: the increase of shear strength with increasing rate of loading and the increase of shear strength as the process transitions from undrained to drained.
Woojin Lee +2 more
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Penetration resistance of lunar soils
Journal of Terramechanics, 1971Abstract Penetration resistance, in terms of the slope G of the stress penetration curve, has been correlated with density for a basaltic lunar soil simulant. The values were measured with the standard WES 30° cone penetrometer. This lunar soil simulant has been found to possess the same penetration resistance characteristics as the Apollo ...
W.N. Houston, L.I. Namiq
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A method for prediction of soil penetration resistance
Soil and Tillage Research, 2007A new equation for predicting penetration resistance of soil is presented. The equation contains two main additive terms: the first is a measure of the degree of compactness of the soil and the second gives the contribution of pore water to the soil strength.
A.R. Dexter, E.A. Czyż, O.P. Gaţe
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Soil Properties Influencing Penetration Resistance of Canfield and Geeburg Soils
Soil Science Society of America Journal, 1981Abstract Penetration resistance was measured in situ by the procedures of the ASTM standard penetration test. Selected horizons were tested at five sites of each of two soil series. Presumptive bearing value is shown to be influenced most strongly by soil moisture content, bulk density, and clay content. These variables explain 78% of
D. E. McCormack, L. P. Wilding
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Automatic instrument for measuring soil penetration resistance
2015 CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies (CHILECON), 2015In modern agriculture, the knowledge of the soil properties is a key factor for profitability in the production. However, data acquisition and processing are limiting factors for its use, since they require specialized labor. The automatic instrument that provides information about soil penetration resistance, which is described here replaces the ...
Geovanne P. Furriel +6 more
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Resistance to penetration of fine probes in compressible soil
Australian Journal of Soil Research, 1966Fine metal probes are being used to simulate the penetration of plant roots into soil. Existing soil mechanics theories on the bearing capacity of piles were used to estimate the point resistance of these probes but were found to be unsatisfactory. It is considered that this was due to the fact that sufficient emphasis is not given to soil compression ...
DA Farrell, EL Greacen
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Soil penetration resistance affected by root exudates
2020<p>The mechanical properties of soil and mucilage have a significant effect on root penetration resistance which can become a limiting factor for root growth in dry and compacted soils. Our hypothesis is that the way how root exudates alter penetration resistance in soil is controlled by the interplay of two mechanisms: on the ...
Ravi Kumar Mysore Janakiram +2 more
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Modeling and correction of soil penetration resistance for varying soil water content
Geoderma, 2011article i nfo For this study penetration resistance (PR) was measured within the pro! les of four Oxisols for a wide range of water contents (! ) and bulk densities. Obtained data were utilized to parameterize 23 previously applied regression models. The most promising models were selected to illustrate effects of soil texture on PR.
Carlos M.P. Vaz +3 more
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