Improvement of thermally durable soil material with perlite additive

2021 ◽  
Vol 81 (1) ◽  
Author(s):  
Esra Güneri ◽  
Yeliz Yukselen-Aksoy
Keyword(s):  
Soil Material

scholarly journals Experimental Interpretation of Physical and Chemical Characteristics of Soil Material upon the Radon and Thoron Exhalation Rate

2007 ◽  
Vol 42 (1) ◽  
pp. 89-97 ◽  
Author(s):  
Masahiro HOSODA ◽  
Yusuke YAMAMOTO ◽  
Kazumasa HARADA ◽  
Toshinari KORI ◽  
Masahiro FUKUSHI ◽  
...  
Keyword(s):  
Chemical Characteristics ◽  
Exhalation Rate ◽  
Soil Material ◽  
Physical And Chemical Characteristics ◽  
Physical And Chemical

scholarly journals Efficacy of a Phosphate-Charged Soil Material in Supplying Phosphate for Plant Growth in Soilless Root Media

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Young-Mi Oh ◽  
Paul V. Nelson ◽  
Dean L. Hesterberg ◽  
Carl E. Niedziela
Keyword(s):  
Plant Growth ◽  
Solution Concentration ◽  
Bulk Solution ◽  
P Deficiency ◽  
Soil Material ◽  
Hydrous Oxides ◽  
Acceptable Range ◽  
Root Media ◽  
Phosphate Fertilization ◽  
Phosphate Leaching

A soil material high in crystalline Fe hydrous oxides and noncrystalline Al hydrous oxides collected from the Bw horizon of a Hemcross soil containing allophane from the state of Oregon was charged with phosphate-P at rates of 0, 2.2, and 6.5 mg·g−1, added to a soilless root medium at 5% and 10% by volume, and evaluated for its potential to supply phosphate at a low, stable concentration during 14 weeks of tomato (Solanum esculentumL.) seedling growth. Incorporation of the soil material improved pH stability, whether it was charged with phosphate or not. Bulk solution phosphate-P concentrations in the range of 0.13 to 0.34 mg·dm−3were associated with P deficiency. The only treatment that sustained an adequate bulk solution concentration of phosphate-P above 0.34 mg·dm−3for the 14 weeks of testing contained 10% soil material charged with 6.5 mg·g−1P, but initial dissolved P concentrations were too high (>5 mg·g−1phosphate-P) from the standpoint of phosphate leaching. The treatment amended with 10% soil material charged with 2.2 mg·g−1P maintained phosphate-P within an acceptable range of 0.4 to 2.3 mg·dm−3for 48 d in a medium receiving no postplant phosphate fertilization.

Change Analysis of Enzyme Activity under Different Conditions of Film Remnant in Soil

2012 ◽  
Vol 518-523 ◽  
pp. 39-43
Author(s):  
Xiao Guang Zhao ◽  
Yuan Yuan Guan ◽  
Wen Yu Huang
Keyword(s):  
Enzyme Activity ◽  
Enzyme Activities ◽  
Scientific Basis ◽  
Soil Enzyme ◽  
Soil Microorganism ◽  
Soil Enzyme Activities ◽  
Change Analysis ◽  
Soil Material ◽  
The Relationship

In this paper, simulated experiments were performed in pots by using soil materials in different conditions of film remnant. Based on the research on soil microorganism quantity trends of soil enzyme activities were analyzed systematically: soil without film remnant, soil with film remnant for 5, 10, 15 and 20 years. By analyzing crop progress, the relationship with soil material was studied, in order to provide scientific basis for the variation laws between different conditions of film remnant and the activity of soil enzyme.

scholarly journals Number of Microorganisms in the Soil Cultivated with Legume-Grass Mixtures Supplied with Phytohormones and Nitrogen

2014 ◽  
Vol 6 (4) ◽  
pp. 498-504
Author(s):  
Jacek SOSNOWSKI ◽  
Kazimierz JANKOWSKI ◽  
Roxana VIDICAN ◽  
Beata WIŚNIEWSKA-KADŻAJAN ◽  
Elżbieta MALINOWSKA ◽  
...  
Keyword(s):  
Soil Microorganisms ◽  
Soil Fungi ◽  
Red Clover ◽  
Soil Material ◽  
Humus Layer ◽  
Number Of Microorganisms ◽  
Four Levels ◽  
Intensive Development ◽  
Number Of Bacteria ◽  
Different Doses

The study concerned the number of microorganisms colonizing the humus layer and under plough soil from the cultivation of perennial ryegrass mixtures with red clover, which were fed by biostimulant based on the phytohormones  and different doses of nitrogen. Nitrogen was applied at four levels-control (no nitrogen), 50, 100 and 150 kg N∙ha-1, biostimulant in two combinations - with and without preparation. Soil material to assess the size of individual groups of microorganisms was collected from each experimental plot in autumn 2010 from the humus (0-20 cm) and under plough layers (20-40 cm). The analysis of soil samples for a total number of bacteria, actinomycetes and fungi was conducted at the Department of Agricultural Microbiology IUNG-PIB in Pulawy. Results of studies have shown that more colonies of bacteria, actinomycetes and fungi were colonized the humus horizon. Biostimulant application in this cultivation led to a decrease of the total number of colonies of the all soil microorganisms groups but improved the ratio of bacteria to fungi. Increasing doses of mineral nitrogen by the limiting of the bacteria number and intensive development of soil fungi, helped to narrow the B/F ratio.

Airborne radionuclides in the proglacial environment as indicators of sources and transfers of soil material

2017 ◽  
Vol 178-179 ◽  
pp. 193-202 ◽  
Author(s):  
Edyta Łokas ◽  
Przemysław Wachniew ◽  
Paweł Jodłowski ◽  
Michał Gąsiorek
Keyword(s):  
Soil Material

Study on Modification of Rammed Earth Material in Mountain Areas

2011 ◽  
Vol 261-263 ◽  
pp. 1178-1181
Author(s):  
Yun Wang
Keyword(s):  
Rammed Earth ◽  
Compressive Properties ◽  
Mountain Areas ◽  
Mountain Area ◽  
Shear Properties ◽  
Soil Material ◽  
Earth Material ◽  
Slaked Lime ◽  
Promising Application

In order to explore the proper modified materials of the raw-soil building in mountain area, the raw-soil modified materials now being used commonly are analyzed effectively at first, and the natural reborn starch resource is thought which has a promising application prospect. In the end, experiments on compressive properties and shear properties of raw-soil material modified by quicklime, slaked lime and starch with different incorporation rates are carried out, and the tests show starch is applicable to modify raw-soil in mountain area.

scholarly journals Spatial Connections between Microplastics and Heavy Metal Pollution within Floodplain Soils

2022 ◽  
Vol 12 (2) ◽  
pp. 595
Author(s):  
Collin J. Weber ◽  
Jens Hahn ◽  
Christian Opp
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Wide Distribution ◽  
Soil Material ◽  
Statistical Correlations ◽  
Floodplain Soils ◽  
Icp Ms ◽  
Metal Contents ◽  
Sediment Layers ◽  
Deposition Conditions

Soils contain an increasing number of different pollutants, which are often released into the environment by human activity. Among the “new” potential pollutants are plastics and microplastics. “Recognized” pollutants such as heavy metals, of geogenic and anthropogenic origin, now meet purely anthropogenic contaminants such as plastic particles. Those can meet especially in floodplain landscapes and floodplain soils, because of their function as a temporary sink for sediments, nutrients, and pollutants. Based on a geospatial sampling approach, we analyzed the soil properties and heavy metal contents (ICP-MS) in soil material and macroplastic particles, and calculated total plastic concentrations (Ptot) from preliminary studies. Those data were used to investigate spatial connections between both groups of pollutants. Our results from the example of the Lahn river catchment show a low-to-moderate contamination of the floodplain soils with heavy metals and a wide distribution of plastic contents up to a depth of two meters. Furthermore, we were able to document heavy metal contents in macroplastic particles. Spatial and statistical correlations between both pollutants were found. Those correlations are mainly expressed by a comparable variability in concentrations across the catchment and in a common accumulation in topsoil and upper soil or sediment layers (0–50 cm). The results indicate comparable deposition conditions of both pollutants in the floodplain system.

Sign in / Sign up

Export Citation Format

Share Document