Australian Journal of Soil Research articles from November 2001

Australian Journal of Soil Research archives from November 2001

Preface: sodicity issues in agricultural industries--current research and future directions.
November 1, 2001... Australia is recognised as containing the world's largest area of sodic soils, with approximately 33% of the continent being affected. The first National Conference and Workshop on Sodic Soils in Australia was held in Adelaide (9-13...

The significance of the threshold and turbidity concentrations in relation to sodicity and microstructure.(Statistical Data Included)
November 1, 2001... Introduction The paper `The effect of electrolyte concentration on soil permeability' (Quirk and Schofield 1955) was republished as a Benchmark Paper in 1984 (Levey). This paper has also been referred to frequently in the literature for...

Soil responses to sodicity and salinity: challenges and opportunities.(Statistical Data Included)
November 1, 2001... Introduction Currently available research information and computer models provide only a limited ability to predict the impacts of soil sodicity and salinity on the permeability of soil to air and water. To a large extent this stems from...

Sodic soil reclamation: Modelling and field study.(Statistical Data Included)
November 1, 2001... Introduction Agricultural productivity in arid regions throughout the world is being threatened by various long-term trends. Increasing urban water demands in arid regions, due in part to increasing population, makes high quality water...

Management of salinity and sodicity in a land FILTER system, for treating saline wastewater on a saline-sodic soil.(Statistical Data Included)
November 1, 2001... Introduction Conventional systems of land application of wastewater on soils with restricted internal drainage, which occur extensively around urban areas in south-eastern Australia, could lead to soil degradation through waterlogging and...

A review of the effects of wastewater sodium on soil physical properties and their implications for irrigation systems.(Statistical Data Included)
November 1, 2001... Introduction There are few sustainable options for wastewater treatment and disposal. Wastewater disposal in rivers has several benefits including maintaining adequate environmental flows and boosting the water volume for downstream users....

Sodicity, conventional drainage and bio-drainage in Israel.(Statistical Data Included)
November 1, 2001... Introduction As soil science progresses to a deeper understanding of the relationships among the various physico-chemical variables operating in the soil domain, scientific work is increasingly being carried out in laboratories rather than...

Prewetting rate and sodicity effects on the hydraulic conductivity of soils.(Statistical Data Included)
November 1, 2001... Introduction Sodic conditions reduce the value and productivity of soils (Sumner and Naidu 1998). Accumulation of sodium in the soil solution and the exchange phase affects soil physical properties such as structural stability, hydraulic...

Wetting rate, sodicity, and soil texture effects on infiltration rate and runoff.(Statistical Data Included)
November 1, 2001... Introduction A common feature of many cultivated soils worldwide is surface sealing caused by the beating action of raindrops or sprinkler irrigation. Seal formation is the result of 2 complementary mechanisms (Agassi et al. 1981): (i) the...

The long-term effects of lime (CaC[O.sub.3]), gypsum (CaS[O.sub.4].2[H.sub.2]O), and tillage on the physical and chemical properties of a sodic red-brown earth.(Statistical Data Included)
November 1, 2001... Introduction Sodic soils contain disproportionately high levels of sodium ([Na.sup.+]) ions relative to calcium ([Ca.sup.2+]) and magnesium ([Mg.sup.2+]) ions in the soil exchange sites and in the soil solution. These soils have poor...

Effects of gypsum and stubble retention on the chemical and physical properties of a sodic grey Vertosol in western Victoria.(Statistical Data Included)
November 1, 2001... Introduction Alkaline sodic soils, defined as having an exchangeable sodium percentage (ESP) [greater than or equal to] 6% (Isbell 1996), and a pH >8 (Rengasamy and Olsson 1991), encompass approximately 73% of agricultural land in Victoria...

Field prediction of sodicity in dryland agriculture in Central Queensland, Australia.(Statistical Data Included)
November 1, 2001... Introduction Soil sodicity is defined as the presence of a high proportion of sodium ions relative to other cations. A high proportion of sodium ions on the clay mineral exchange weakens the bonds of the soil particles when the soil is...

Measuring transient solute transport through the vadoze zone using time domain reflectometry.(Statistical Data Included)
November 1, 2001... Introduction The dynamics of solute transport in the unsaturated soil affect several aspects of soil management, such as fertiliser applications, wastewater disposal, as well as remediation and soil decontamination. A range of different...

Field and laboratory calibration and test of TDR and capacitance techniques for indirect measurement of soil water content.
November 1, 2001... Introduction Two techniques were used to obtain volumetric soil water content in an intensive water balance study of a small catchment. The techniques were time domain reflectometry (TDR) and a frequency domain sensor, the Didcot...

Studies of soil water drawdowns by single radish roots at decreasing soil water content using computer-assisted tomography.(Statistical Data Included)
November 1, 2001... Introduction Water drawdowns by plant roots grown in soil at high water potential ([greater than or equal to] -30 kPa) have been studied in some detail using X- and gamma-ray computed tomography (Hainsworth and Aylmore 1986; Aylmore and...

Leaching of bacterial indicators of faecal contamination through four New Zealand soils.(Statistical Data Included)
November 1, 2001... Introduction Disposal of animal effluents and wastes on land creates the risk for microbial contamination of underlying groundwater. In the Waikato region of New Zealand, which is intensively farmed, the current trend is for greater use of...

Immobilisation and mineralisation of carbon and nitrogen from dairy farm effluent during laboratory soil incubations.(Statistical Data Included)
November 1, 2001... Introduction Dairy farm effluent (DFE) is a mixture of dairy cow faeces, urine, and wash-down water, formed during the cleaning of the milking parlour and associated holding yards. DFE is a very dilute organic effluent, comprising a...

Resolution of the [sup.15]N balance enigma?(Statistical Data Included)
November 1, 2001... Introduction The enigma of soil nitrogen (N) balance sheets was discussed by Allison (1955), who reviewed several lysimeter experiments where cropped soils received N. On average 20% of the N was unable to be recovered. Allison (1955)...

Comparing simple methods for measuring phosphate sorption by soils.(Statistical Data Included)
November 1, 2001... Introduction Although the buffering capacity of a soil for phosphate has a large effect on optimum phosphate fertiliser rates, analytical laboratories are reluctant to measure sorption curves. They argue that the cost of the several...

The Australian soil texture boomerang: a comparison of the Australian and USDA/FAO soil particle-size classification systems.(Statistical Data Included)
November 1, 2001... Introduction Various pedotransfer functions for predicting soil physical and chemical properties have been developed. Cresswell and McKenzie (2000) developed a computer program for predicting soil hydraulic properties of Australian soil....

The burrowing characteristics of three common earthworm species.(Statistical Data Included)
November 1, 2001... Introduction In agricultural soils in New Zealand, earthworm populations consist of introduced European lumbricid species and are dominated by Aporrectodea caliginosa, with smaller numbers of both Lumbricus rubellus and Octolasion cyaneum...

Hydrology of swelling soils: a review. (Corrigendum).(correction to the review article by Smiles, 2000)(Correction Notice)
November 1, 2001... I recently reviewed my paper on hydrology of swelling soils (Smiles 2000) and found that Eqns 25 and 26 in that paper are incorrect. They involve differentiation of the function representing the total potential of water in unsaturated swelling...