Australian Journal of Soil Research articles from January 2004

Australian Journal of Soil Research archives from January 2004

Determination of water content in drying soils: incorporating transition from liquid phase to vapour phase.
January 1, 2004... Introduction In arid and semi-arid regions, evaporative demand is usually greater than the ability of the soil to conduct water in the liquid phase, and the liquid diffusivity becomes less than the vapour diffusivity at low water content...

Analysis of turbulent flow patterns of soil water under field conditions using Burgers equation and porous suction-cup samplers.
January 1, 2004... Introduction In this paper, we aim to investigate the transient movement of water towards a porous cup sampler, which can be regarded theoretically as a spherical sink. In this case, the flow patterns around the sink, the yield, and inflow...

Herbicide loss in runoff: effects of herbicide properties, slope, and rainfall intensity.
January 1, 2004... Introduction Off-target movement of herbicides is an ecological and human health concern (Wilcock 1989). The Ministry of Health in New Zealand (Ministry of Health 2000) has derived Maximum Acceptable Values (MAV) for pesticides in drinking...

Comparison of four methods for liberating various aggregate fractions in Vertosols to study their morphology.
January 1, 2004... Introduction The presence of stable aggregates at the soil surface affects the potential for soil to be utilised for crop production. For Vertosols, a lack of stable aggregates >100 [micro]m in diameter may result in the formation of...

The effects of clay and sand additions on the strength of sandy topsoils.
January 1, 2004... Introduction The clay contents of sandy topsoils may be modified either intentionally, to overcome water repellency, or inadvertently as a result of erosion. Large areas of very sandy soils are farmed in south-western Australia, and these...

Inventories and elemental accumulation in peat soils of forested seabird breeding islands, southern New Zealand.
January 1, 2004... Introduction Elemental fluxes are commonly from the terrestrial to the marine environment. However, the breeding ecology of some animals leads to locally significant exceptions. Prime examples include rivers involved in salmon spawning...

Investigation by electro-ultrafiltration on N and P distribution in rhizosphere and bulk soil of field-grown corn.
January 1, 2004... Introduction For plant nutrition, it is the quantity of available elements rather than the quantity of extractable nutrients that is of primary importance (van Raij and van Diest 1979). Assessment of available soil nutrients and the...

Silver ion desorption kinetics from iron oxides and soil organic matter: effect of adsorption period.
January 1, 2004... Introduction The mobility and the bioavailability, and so the potential toxicity, of a trace metal ion in soils depends on its concentration in soil solution, and the releasing or binding of a metal ion by soil particles. Previous studies...

Chemical characterisation of deep profile Ferrosols under sugarcane in wet tropical northern Queensland.
January 1, 2004... Introduction The ability of highly weathered tropical soils to retain anions is well known (Kinjo and Pratt 1971a; Mekaru and Uehara 1972; Black and Waring 1979; Wong et al. 1990). The presence of variable charge minerals (e.g....

Calibration of the Rothamsted organic carbon turnover model (RothC ver. 26.3), using measurable soil organic carbon pools.
January 1, 2004... Introduction Soil organic carbon (SOC) turnover simulation models have been widely used to predict SOC change with changing environmental and management conditions. These models include the Rothamsted (Jenkinson 1990), Century (Parton et...

Phosphorus auditing cannot account for all of the phosphorus applied to different pasture soils.
January 1, 2004... Introduction The loss of phosphorus (P) from agricultural land to water is a major concern, as it can lead to the eutrophication of surface water by stimulating toxic algal growth (Sharpley et al. 1994). Although P losses from soil to...

Dairy pasture responses to soil physical properties.
January 1, 2004... Introduction Cattle treading can have detrimental effects on soil physical quality and pasture growth. Many pasture and treading studies have centred on single pugging events, often with deep hoof imprints in soft soil causing considerable...

Dung decomposition in temperate dairy pastures I. Changes in soil chemical properties.
January 1, 2004... Introduction Dairy cows contribute significantly to nutrient cycling in grazed pastures by returning large amounts of phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), sodium (Na), and sulfur (S) in dung (Blair et al. 1976;...

Dung decomposition in temperate dairy pastures II. Contribution to plant-available soil phosphorus.
January 1, 2004... Introduction Soil phosphorus (P) consists of inorganic, organic, and microbial fractions. Most of the inorganic and organic fractions are only sparingly available for use by plants and the soil biota. Several methods have been developed to...