Australian Journal of Soil Research articles from March 2004

Australian Journal of Soil Research archives from March 2004

Fate and behaviour of pesticides in the agroecosystem--a review with a New Zealand perspective.
March 1, 2004... Introduction It goes without saying that the use of pesticides in modern agriculture to control weeds, insects, other pests and diseases has significantly increased global food production. The term 'pesticides' encompasses a great range of...

FLAG UPNESS and its application for mapping seasonally wet to waterlogged soils.
March 1, 2004... Introduction In this paper the UPNESS index derived in the FLAG model was tested against depth to watertable and groundwater EC to assess how well it represents the subsurface accumulation of water in the Wagga Wagga Catchment. The UPNESS...

Wettability of soil aggregates from cultivated and uncultivated Ustolls and Usterts.
March 1, 2004... Introduction Soil wettability is the property of the soil to become wet and is the opposite of soil water repellency. Soil wettability can be measured as the rate of water entry into unsaturated soil. The amount, size, geometry,...

Water-stable aggregates of flooded inceptisols from south-eastern Nigeria in relation to mineralogy and chemical properties.
March 1, 2004... Introduction Field soils that are subjected to seasonal flooding and subsequent dry periods undergo drastic structural changes due to alternate wetting and drying. Harris et al. (1966) observed that this phenomenon might lead to breakdown...

Quasi-equilibrium of organic carbon in shrink--swell soils of the subhumid tropics in India under forest, horticulture, and agricultural systems.
March 1, 2004... Introduction Restoration of soil quantity and quality through soil organic carbon (SOC) management is a major concern for tropical soils. To sustain their quality and productivity, knowledge of SOC in terms of its amount and quality needs...

Mineralisation of soil orthophosphate monoesters under pine seedlings and ryegrass.
March 1, 2004... Introduction Continued advances in our understanding of the chemical nature and associated dynamics of soil phosphorus (P) are important to ensure that agricultural and forest ecosystems are managed in a sustainable manner. Soil organic P...

Soil phosphorus enhancement below stormwater outlets in urban bushland: spatial and temporal changes and the relationship with invasive plants.
March 1, 2004... Introduction The substantial reserves and remnant tracts of bushland located within Sydney's urban area are widely valued for their floristic diversity, habitat for indigenous flora and fauna, and aesthetic relief, as well as the important...

Dry season suspended sediment concentration and sedimentation in the Richmond River estuary, northern NSW, Australia.
March 1, 2004... Introduction Suspended sediments play an important role in fluvial and coastal ecosystems by changing the physical and chemical properties of the bottom sediments and water column and by providing an important transport medium for...

Effects of sheep grazing episodes on sediment and nutrient loss in overland flow.
March 1, 2004... Introduction Intensive grazing by sheep results in damage to pasture, which increases the concentration of sediment and nutrients in overland flow and the amount of runoff generated. This has the potential to degrade water quality in...

The role of N transformations in the formation of acidic subsurface layers in stock urine patches.
March 1, 2004... Introduction Soil acidification is a widespread problem limiting agricultural production in much of Australia (Helyar et al. 1990; Ridley et al. 1990; Dolling et al. 1991; Moody et al. 1998). It is estimated that 15% (13.7 million ha) of...

A survey of the cation content of piggery effluents and some consequences of their use to irrigate soils.
March 1, 2004... Introduction High levels of potassium ([K.sup.+]) in soils are believed to degrade soil structure, and plant production is reduced because the physical fertility of the soil is diminished. Piggery effluent has relatively high...

Pools of selenium in some Indian soils at field capacity and submerged moisture regimes.
March 1, 2004... Introduction Availability of selenium (Se) in the soil to plants and subsequently to animals and human beings depends upon its chemical forms in the soil environment, which in turn are controlled by several biotic and abiotic factors....