CALIBRATION OF A SINGLE GAMMA PROBE FOR MEASURING WET BULK DENSITY IN ORGANIC SOIL

1980 ◽  
Vol 60 (1) ◽  
pp. 133-135 ◽  
Author(s):  
B. VIGIER ◽  
J. A. CAMPBELL
Keyword(s):  
Bulk Density ◽  
Gamma Probe ◽  
Organic Soil ◽  
Organic Soils ◽  
Sampling Depth ◽  
Density Measurements ◽  
In Situ Calibration ◽  
Probe Calibration

The effect of degree of decomposition and depth of sampling on gamma probe wet bulk density measurements was investigated for two organic soils. Sampling depth did not significantly affect the probe calibration. In situ calibration must be done rather than in laboratory.

MONOLITH COLUMNS FOR STUDYING ORGANIC SOIL PROFILES

1986 ◽  
Vol 66 (4) ◽  
pp. 737-742
Author(s):  
J. A. MILLETTE ◽  
R. S. BROUGHTON
Keyword(s):  
Hydraulic Conductivity ◽  
Physical Properties ◽  
Bulk Density ◽  
Organic Soil ◽  
Saturated Hydraulic Conductivity ◽  
Fiber Content ◽  
Organic Soils ◽  
Soil Profiles ◽  
Sampling Procedures ◽  
Monolith Columns

Monolith column construction and sampling procedures were described for organic soil profiles and used to measure the variation with depth of saturated hydraulic conductivity, bulk density and fiber content. The top 0.30 m of the organic soil was more permeable, had a greater bulk density and had a greater fiber content than the soil layer between 0.60 and 0.90 m from the soil surface. These columns can be used for correlations studies between physical properties and studies of the dynamic nature of the physical properties of organic soils. Key words: Saturated hydraulic conductivity, bulk density, fiber content, organic soil, monolith columns

CHEMICAL, PHYSICAL, AND LAND-USE INVESTIGATIONS OF ORGANIC TERRAIN

1975 ◽  
Vol 55 (3) ◽  
pp. 331-342 ◽  
Author(s):  
M. E. WALMSLEY ◽  
L. M. LAVKULICH
Keyword(s):  
Water Retention ◽  
Particle Density ◽  
Organic Soil ◽  
Surface Expression ◽  
Organic Soils ◽  
Sampling Area ◽  
Temperature Conductivity ◽  
Water Retention Properties ◽  
Physical And Chemical

Chemical and physical properties of selected organic soil samples were studied in relation to the chemical status of the associated ground water. Soil analyses included standard chemical analyses, fibre content, bulk density, particle density, hydraulic conductivity and water retention properties. In situ water chemical analysis included temperature, conductivity, dissolved oxygen and pH. Laboratory measurements of dissolved Ca, Mg, N, K, Si, NO3, F and Cl are also reported. The results are interpreted with reference to the surface expression and overall terrain morphology of the sampling area resulting in the formation of different peat types and associated vegetation. Physical and chemical data indicate a relationship between degree of decomposition and magnitude of various parameters. The distinction between bog and fen areas in terms of the level of dissolved electrolytes permits the prediction of the nature of the material comprising the organic soil. The distinctive properties of organic soils are discussed in terms of some use constraints imposed by the nature of the material in the context of afforestation of this terrain type.

scholarly journals A photogrammetry-based approach for soil bulk density measurements with an emphasis on applications to cosmogenic nuclide analysis

2020 ◽  
Author(s):  
Joel Mohren ◽  
Steven A. Binnie ◽  
Gregor M. Rink ◽  
Katharina Knödgen ◽  
Carlos Miranda ◽  
...  
Keyword(s):  
Bulk Density ◽  
Soil Bulk Density ◽  
Small Scale ◽  
Sampling Techniques ◽  
Soil Density ◽  
Density Measurements ◽  
Cosmogenic Nuclide ◽  
Accuracy And Precision ◽  
Single Lens

Abstract. The quantification of soil bulk density (ρB) is a cumbersome and time-consuming task when traditional soil density sampling techniques are applied. However, it can be important for terrestrial cosmogenic nuclide (TCN) production rate scaling when deriving ages or surface process rates from buried samples, in particular when short-lived TCN such as in situ 14C are applied. Here we show that soil density determinations can be made using structure-from-motion multi-view stereo (SfM-MVS) photogrammetry-based volume reconstructions of sampling pits. Accuracy and precision tests as found in the literature and as conducted in this study clearly indicate that photographs taken from both a consumer-grade digital single lens mirrorless (DSLM) and a smartphone camera are of sufficient quality to produce accurate and precise modelling results, i.e. to regularly reproduce the true volume and/or density by > 95 %. This finding holds also if a freeware-based computing workflow is applied. The technique has been used to measure ρB along three small-scale (

INEXPENSIVE THERMISTOR SENSORS FOR TEMPERATURE MEASUREMENTS IN ORGANIC SOILS

1981 ◽  
Vol 61 (3) ◽  
pp. 521-524
Author(s):  
JAMES A. CAMPBELL ◽  
LOUISE FRASCARELLI
Keyword(s):  
Stainless Steel ◽  
Soil Temperature ◽  
Organic Soil ◽  
In Situ Measurements ◽  
Temperature Measurements ◽  
Organic Soils

Thermistors were incorporated in stainless steel tubular probes and in CPVC epoxy-filled pioe for accurate periodic and continuous in situ measurements of temperature in organic soil. Temperature can be measured with ± 0.1 °C with portable analog meters and ± 0.01 °C with digital meters.

scholarly journals Identification of local organic soils based on cone penetration test results

2014 ◽  
Vol 13 (2) ◽  
pp. 049-056
Author(s):  
Grzegorz Straż
Keyword(s):  
Organic Soil ◽  
Organic Soils ◽  
Test Results ◽  
Penetration Test ◽  
Cone Penetration ◽  
Penetration Testing ◽  
Cone Penetration Testing ◽  
In Situ Conditions

This paper presents the results of attempts to identify organic soils on the basis of test results performed under in situ conditions by cone penetration testing (CPT). The results of 439 selected tests were analysed which reflected the behaviour of local organic soils of organic matter ranging from 6,3 to 17,4%. Crucial to soil investigation were values measured of cone resistance (qc) and sleeve friction (fs) and the friction ratio (Rf) estimated according to those values. To identify organic soils, selected criteria were used, proposed among others by: Mayne, Marr, Bergmann, Schmertmann, Capanella and Robertson [2,5]. An analysis showed that an identification of organic soil types in terms of the present classification of standards, in view of the criteria used, is ambiguous and does not allow to identify them precisely by CPT.

MEASUREMENT OF CO2 EVOLVED FROM ORGANIC SOIL AT DIFFERENT DEPTHS IN SITU

1981 ◽  
Vol 61 (1) ◽  
pp. 137-144 ◽  
Author(s):  
J. A. CAMPBELL ◽  
L. FRASCARELLI
Keyword(s):  
Soil Column ◽  
Soil Surface ◽  
Organic Soil ◽  
Organic Soils ◽  
Concentration Profiles ◽  
Undisturbed Soil ◽  
Surface Evolution ◽  
Different Depths ◽  
A New Technique

A new technique for measuring CO2 evolved from organic soil at different depths in situ was used to monitor CO2 evolution in four experimental sites in southwestern Quebec and in an undisturbed soil column in the laboratory. The technique can be used in conjunction with in situ measurements of surface evolution of CO2, which are used as indicators of total subsidence by oxidation. Subsurface measurements of CO2 evolution provide more detailed estimates of where oxidation is occurring within the profile in organic soils. It also provides a simpler, more direct way of measuring CO2 fluxes below the soil surface than modelling from concentration profiles.

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