Results 191 to 200 of about 314,011 (252)

Brazilian Tensile Test for Soils

Canadian Geotechnical Journal, 1974
Analysis and design of impermeable cores of earth dams against cracking require knowledge of the tensile strengths and tensile stress–strain relationships of the concerned soils. The same is needed for any stress and deformation analysis of an earth structure when a portion of it is expected to be in tension.
A.V. Krishnayya, Z. Eisenstein
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Mechanical Testing in Unsaturated Soils

Geotechnical and Geological Engineering, 2008
The state-of-the-art report presented herein is aimed at documenting, to the largest extent possible, some of the recent advances in laboratory testing of unsaturated soils for stress–strain–strength–stiffness characterization under suction-controlled isotropic, axisymmetric, and true triaxial stress states.
Hoyos, Laureano, Laloui, Lyesse, Vassallo, Roberto   +2 more
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Soil phosphorus tests II: A comparison of soil test–crop response relationships for different soil tests and wheat

Crop & Pasture Science, 2013
The performance of a wide range of soil phosphorus (P) testing methods that included established (Colwell-P, Olsen-P, BSES-P, and CaCl2-P) and more recently introduced methods (DGT-P and Mehlich 3-P) was evaluated on 164 archived soil samples corresponding to P fertiliser response experiments with wheat (Triticum aestivum) conducted in south-eastern ...
Speirs, S., Scott, B., Moody, P., Mason, S.   +3 more
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Comparing soil test kits with standard lab‐based soil tests for agricultural soils

Crops & Soils, 2019
Growers often have questions regarding the reliability of the commercial soil NPK test kits for understanding their soil's N, P, and K availability. This article compares and evaluates four soil NPK kits—(i) Rapitest, (ii) LaMotte, (iii) Hanna, and (iv) Hach—with standard laboratory methods for analyzing soil available N, P, and K.
Swati Sharma, Amitava Chatterjee
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Soil Test Demand: The Case of the University of Tennessee Soil Testing Laboratory

Journal of Production Agriculture, 1995
Soil testing labs provide an important service that helps farmers hone their fertilizer decisions. This service also benefits society by simultaneously addressing the growing demand for food and the environmental concerns associated with over fertilization. This study was motivated by the hypothesis that economics plays a role in determining the amount
Roland K. Roberts, Hubert J. Savoy
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Problems of soil testing on calcareous soils

Plant and Soil, 1957
The problems connected with soil testing on calcareous soils are discussed. It is pointed out that in calcareous soils pH differences in the range of pH 7.0–8.5 are meaningless unless the measurements are made under standard conditions with respect to CO2 and Ca-ion concentration.
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Soil Testing

2017
Soil testing is crucial for farmers to improve fertilizer efficiency, nutrient levels, and benefits from lime and fertilizer investments.
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Soil Test Note #1. Explanation of Soil Tests

2015
This publication explains soil tests and will help assess plants' need for fertilizer and lime.
Maguire, Rory O., Heckendorn, Steven E.
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pH Tests on Soils

Proceedings of the Prehistoric Society, 1987
pH tests were carried out on eight soil samples taken from the site at the time of excavation. These were prepared and processed according to Black 1965, 922-923. Locations of the samples and the results showing the soils to be acidic are given below. All the samples were taken from the medium brown sandy loam (fig. 4).
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In Situ Soil Testing

2014
Mechanical properties of the geomaterial frequently change during the sampling and the traveling as will be described in Sect. 6.5. Therefore, it is recommended to obtain the mechanical properties in situ as possible. As shown in Fig. 4.4, however, an in situ test is difficult to obtain the behavior at large strain.
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