Effect of the density and moisture content of a sandy soil on the dimensions of a pothole with an underground explosion

1979 ◽  
Vol 15 (3) ◽  
pp. 376-383 ◽  
Author(s):  
V. V. Adushkin
Keyword(s):  
Moisture Content ◽  
Sandy Soil ◽  
Underground Explosion

Radiographic study of the initial stage of development of an underground explosion in sandy soil

1970 ◽  
Vol 6 (3) ◽  
pp. 320-326 ◽  
Author(s):  
L. V. Al'tshuler ◽  
A. V. Balabanov ◽  
V. A. Batalov ◽  
V. A. Rodionov ◽  
D. M. Tarasov
Keyword(s):  
Sandy Soil ◽  
Underground Explosion ◽  
Radiographic Study ◽  
Stage Of Development ◽  
Initial Stage

scholarly journals A recording apparatus for measuring thermal conductivity, and some results obtained with it in soil.

1954 ◽  
Vol 2 (3) ◽  
pp. 168-175
Author(s):  
R.H.A. Van Duin ◽  
D.A. De Vries
Keyword(s):  
Thermal Conductivity ◽  
Moisture Content ◽  
Sandy Soil ◽  
Repeated Measurements ◽  
Grass Cover ◽  
Automatic Apparatus ◽  
Recording Apparatus ◽  
Photographic Record ◽  
Straight Line ◽  
Field Soils

The automatic apparatus described comprises a number of elements which, placed to various depths at 3-90 cm in field soils, are successively switched on so as to give a straight-line photographic record of the deflections of a galvanometer. The gradient of the line is a measure of thermal conductivity, from which moisture content may indirectly be computed and evapo-transpiration determined by repeated measurements. Results of moisture determinations in a sandy soil under grass cover are reported. The method is well suited for observing moisture changes in lysimeters. (Abstract retrieved from CAB Abstracts by CABI’s permission)

Specific Heat and Volumetric Heat Capacity of Granular Materials as Affected by Moisture and Density

2014 ◽  
Vol 575 ◽  
pp. 103-107 ◽  
Author(s):  
Nidal H. Abu-Hamdeh
Keyword(s):  
Heat Capacity ◽  
Moisture Content ◽  
Specific Heat ◽  
Granular Materials ◽  
Sandy Soil ◽  
Laboratory Experiments ◽  
Soil Density ◽  
Laboratory Studies ◽  
Volumetric Heat Capacity ◽  
Loam Soil

The granular materials examined in this study were some Saudian soils. The effect of water content and bulk density on the specific heat and volumetric heat capacity of two Saudian soils (sand and loam) was investigated through laboratory studies. These laboratory experiments used the calorimetric method to determine specific heat of soils. For the type of soils studied, specific heat increased with increased moisture content. Also, volumetric heat capacity increased with increased moisture content and soil density. The volumetric heat capacity and specific heat of soils observed were compared with independent estimates made using derived theoretical relations. The differences between the observed and predicted results were very small. Loam soil generally had higher specific heat and volumetric heat capacity than sandy soil for the same moisture content and soil density.

scholarly journals The Effect of Soil Coverings on Soil Respiration in Sandy Soil

2003 ◽  
pp. 21-25
Author(s):  
Csaba Varga
Keyword(s):  
Soil Respiration ◽  
Moisture Content ◽  
Sandy Soil ◽  
The Other ◽  
Co2 Production ◽  
Favourable Effect ◽  
Control Soil ◽  
Soil Co2 ◽  
The Difference ◽  
Soil Co2 Production

The purpose of our experiments is to study effect of different soil coverings (porous black polyethylene called agroszövet and black polyethylene) on CO2 production in sandy soil. The CO2 production was measured in our laboratory according to Witkamp (1966 cit. Szegi, 1979), after 5 days’ incubation period. Samples were taken off four times (March, May, July, September) in every year of the experiment. In May, July and September of 2000, the CO2 production was significantly higher in the control than in the treatment soil. With the exception of September, the value of CO2 production was significantly higher under black polyethylene than under agroszövet. In March and May of 2001, the soil under black polyethylene, and in July and September the control soil produced the greatest quantity of CO2. With the exception of July, significantly more CO2 was produced under black polyethylene than under agroszövet. To study the dynamic of CO2 production there was find a significantly higher value May and September of 2001 than 2000. Similarly significant higher CO2 production was detected in September than in the other months In average of two experimental years the difference between the produced CO2 under different coverings was occasionally. Explicit upward tendency in soil CO2 production was detected only in case of control soil. There was a medium (r=0,413) relationship observed between the moisture content and the CO2 producing ability of soil. To sum up the soil coverings had favourable effect on soil CO2 production very rearly, but they could help to conserve the moisture content of soil.

scholarly journals Effects of Biochar and Synthetic Polymer on the Hydro-Physical Properties of Sandy Soils

2018 ◽  
Vol 10 (12) ◽  
pp. 4642 ◽  
Author(s):  
Arafat Alkhasha ◽  
Abdulrasoul Al-Omran ◽  
Anwar Aly
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Physical Properties ◽  
Sandy Soil ◽  
Soil Moisture Content ◽  
Column Experiment ◽  
Field Capacity ◽  
Infiltration Rate ◽  
Arid Environments ◽  
Percentage Decrease

Synthetic polymers, such as polyacrylamide (PAM), and biochar are generally used as soil amendments to improve soil properties. This paper explores a laboratory column experiment conducted to investigate the effects of biochar (pyrolysis at 400–450 °C) and polymers, with different application rates, on the hydro-physical properties of sandy soil. The experiment evaluated four rates each of biochar (0.0% (C), 2% (B1), 4% (B2), 6% (B3) and 8% (B4)) and polymers (0.0% (C), 0.2% (P1), 0.4% (P2), 0.6% (P3), and 0.8%(P4)), as well as a mixture of them. The infiltration rate decreased significantly when a mixture of biochar and polymers was adopted. B1 showed a decrease of 32.73% while a mixture of 8% (B4) and (0.8%) P4 exhibited a decrease of 57.31%. The polymers increased the infiltration rate at low concentrations (P1 and P2) and reduced it at high concentrations (P3 and P4). The cumulative evaporation decreased significantly for most treatments. B1 recorded the highest decrease in cumulative evaporation with a percentage decrease of 31.9%. The highest decrease in hydraulic conductivity (Ks) was for B1. However, the mixture of B4 and P4 resulted in the highest increase in soil moisture content at field capacity compared to the control and other treatments. P4 and the mixture of B2 and P2 showed significant (p < 0.05) increases in the percentage of stable aggregate (SA) in fraction size (0.25–0.125 mm). Although the mixture of B4 and P4 had the highest increase in soil moisture content, this study recommends using the B1 treatment on sandy soil in arid environments due to its strong hydro-physical properties and affordability.

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