scholarly journals Review on uranium in soil: levels, migration

2020 ◽  
pp. 117-132
Author(s):  
N. I. Sanzharova ◽  
A. N. Ratnikov ◽  
S. V. Fesenko ◽  
D. G. Sviridenko
Keyword(s):  
Soil Water ◽  
Natural Radionuclides ◽  
Chemical Properties ◽  
Soil Types ◽  
Physical And Chemical Properties ◽  
Additional Source ◽  
Phosphorus Fertilizers ◽  
And Migration ◽  
Physical And Chemical ◽  
And Chemical Properties

The problems of radioactive contamination of biosphere with the 238U in recent years have attracted a large number of experts in various fields of knowledge. Natural radionuclides are an integral part of the biosphere. They are concentrated everywhere: in rocks, in soil, water, air and food. Various types of phosphorus fertilizers and other natural ameliorants used in agriculture are also an additional source of heavy natural radionuclides. The review describes the behaviour and migration of 238U in biosphere, which depend on various factors acting simultaneously. It is noted that the behaviour of 238U in the soil depends on the forms of its presence in it and the physical and chemical properties of the soil. The processes of sorption and desorption of 238U by different soil types are significant indicators.

Effects of subsoil amendments on soil physical properties, crop response, and soil water quality in a dry year

Soil Research ◽  
2010 ◽  
Vol 48 (2) ◽  
pp. 140 ◽  
Author(s):  
T. M. McBeath ◽  
C. D. Grant ◽  
R. S. Murray ◽  
D. J. Chittleborough
Keyword(s):  
Soil Water ◽  
Chemical Properties ◽  
Crop Productivity ◽  
Residual Effects ◽  
Physical And Chemical Properties ◽  
Deep Placement ◽  
Growing Seasons ◽  
Texture Contrast ◽  
Physical And Chemical ◽  
And Chemical Properties

In southern Australia the ability of field crops to extract soil moisture and nutrients from depth depends on the physical and chemical properties of the subsoil. In texture-contrast soils accumulation of water and nutrients in the E or A2 horizon, immediately above a clay B horizon of much lower hydraulic conductivity (herein called the interface), may generate lateral flows and enhanced nutrient and solute transfer to water bodies. Evidence that deep-ripping with addition of subsoil nutrients can increase crop productivity in regions having hostile, alkaline subsoils led to experiments to test whether this response was related to an increase in the use of water and nutrients in the subsoil. Our study measured the effects of deep-ripping with and without amendments on soil physical and chemical properties of the A and upper B horizons of 2 South Australian soils. Deep-ripping and deep-placement of nutrients increased grain harvest weight even in an exceptionally dry season. The greater yield was accompanied by significantly lower field-penetration resistance to 0.35–0.50 m depth, which we hypothesise enabled the crop to better access stored soil water and deep placed nutrients in the subsoil. Residual effects from deep-ripping were minimal after 4 growing seasons; therefore, ripping will need to be practiced at regular intervals to maintain treatment effects. The ripping and nutrient amendments had no significant effect on exchangeable sodium percentage, electrical conductivity, and readily extractable phosphorus and nitrate-nitrogen, despite changes in these soil properties between spring and harvest sampling.

Soils of the Poplar Box (Eucalyptus populnea) communities of Eastern Australia.

1980 ◽  
Vol 2 (1) ◽  
pp. 17 ◽  
Author(s):  
AA Webb ◽  
PJ Walker ◽  
RH Gunn ◽  
AT Mortlock
Keyword(s):  
Soil Type ◽  
New South ◽  
Chemical Properties ◽  
Soil Types ◽  
Physical And Chemical Properties ◽  
South Wales ◽  
Eastern Australia ◽  
Physical And Chemical ◽  
Eucalyptus Populnea ◽  
And Chemical Properties

Information on the soils of recognized poplar box (Eucalyptus populnea) communities has been collated from published and unpublished reports. Major soils have been described briefly in terms of morphology and some physical and chemical properties. Site data from a number of previous surveys was used in an attempt to identify soil type/vegeration relationships. Poplar box occurs on a very \\'ide range of soil types. Approximately half of the 1500 sites described in Queensland and New South Wales were on duple\ soils. The data indicate that poplar box prefers lighter textured soils such as uniform sands and massive earths in the western areas of its distribution but in the eastern, more mesic areas il occurs mainly on duplex clay soits.

scholarly journals Influence of physical and chemical properties of different soil types on optimal soil moisture for tillage

Poljoprivreda ◽  
2017 ◽  
Vol 23 (2) ◽  
pp. 10-18 ◽  
Author(s):  
Vladimir Zebec ◽  
◽  
Zoran Semialjac ◽  
Monika Marković ◽  
Vjekoslav Tadić ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Chemical Properties ◽  
Soil Types ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
And Chemical Properties
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