Australian Journal of Soil Research articles from July 2004

Australian Journal of Soil Research archives from July 2004

Integrated basin-scale and field-scale modelling as a tool to assess improved water and salinity management.
July 1, 2004... Introduction Water scarcity and salinisation are major threats to sustainable irrigated agriculture around the world. Seckler et al. (1999) predicted that over the next 25 years, 17% more water should be diverted to irrigation in order to...

Spatial variability studies of soil hydro-physical properties using GIS for sustainable crop planning of a watershed of eastern India and its testing in a rainfed rice area.
July 1, 2004... Introduction Most of eastern India (Assam, West Bengal, Orissa, Jharkhand, eastern Uttar Pradesh, and Chhartisgarh) has good quality natural resources basic to agriculture (soils, hydrology, topography, etc.) and plenty of rainfall...

Development of an equation to relate electrical conductivity to soil and water salinity in a Mediterranean agricultural environment.
July 1, 2004... Introduction The measurement of the electrical conductivity (EC) in soil saturation extracts has been widely used for years as a fast and reliable evaluation of soil salinity. The empirical linear relationship that arises between EC and...

Rapid identification of soil textural and management zones using electromagnetic induction sensing of soils.
July 1, 2004... Introduction Spatial variability within a paddock was largely ignored until the advent in the late 1980s of technologies that can spatially reference continuous measurement of a property of the soil or crop (Cook and Bramley 1998)....

Micromorphology and electron microprobe analysis of phosphorus and potassium forms of an Indian Black Earth (IBE) anthrosol from Western Amazonia.
July 1, 2004... Introduction The Terra Preta Anthrosols of Amazonia (Indian black-earth, IBE) are mainly kaolinitic Oxisols, Ultisols, and Inceptisols with a phosphate-rich anthropic epipedon. They have been described and analysed (Katzer 1933; Gourou...

Chemistry, radiocarbon ages, and development of a subtropical acid peat in Queensland, Australia.
July 1, 2004... Introduction Peatlands have been recognised to play an important part in the global carbon (C) cycle, as they have been estimated to store about one-third of the global terrestrial C pool (Gorham 1991) and contain about 450 Gt of readily...

The isolation and characterisation of bacteria with the potential to degrade waxes that cause water repellency in sandy soils.
July 1, 2004... Introduction Water-repellent soils occupy more than 5 million hectares of western and southern Australia and are associated primarily with siliceous sands (Tate et al. 1989). Water repellency causes uneven infiltration of water, and this...

Effect of humic acid, sodium, and calcium additions on the formation of water-stable aggregates in Western Australian wheatbelt soils.
July 1, 2004... Introduction Soil organic matter plays an important role in maintaining the stability of soil aggregates (Chaney and Swift 1984). Its main constituents are humic substances, which, together with polysaccharides, are the active ingredients...

Dissolution of milled-silicate rock fertilisers in the soil.
July 1, 2004... Introduction There is an increasing interest in the use of silicate and other rock fertilisers as replacements for chemical fertilisers, particularly in organic agriculture (Leonardos et al. 1987; Bockman et al. 1990). However, the use of...

The process of sulfide oxidation in some acid sulfate soil materials.
July 1, 2004... Introduction Acid sulfate soil (ASS) contains iron sulfides or the products of sulfide oxidation (White and Melville 1996). Pyrite (Fe[S.sub.2]) is the most common sulfide in ASS, although other sulfides including marcasite (Fe[S.sub.2])...

Leaching of macronutrients and metals from undisturbed soils treated with metal-spiked sewage sludge. 2. Leaching of metals.
July 1, 2004... Introduction It has been generally considered that the presence of metals in soil treated with sewage sludge is confined to the cultivation zone with very little movement below that depth (e.g. Smith 1996). This assumption appears to be...

Performance of grass and rainforest riparian buffers in the wet tropics, Far North Queensland. 1. Riparian hydrology.
July 1, 2004... Introduction The wet tropics present extreme rainfall conditions for testing the effectiveness of riparian buffers. High intensity, long duration rainfall events generate considerable volumes of surface runoff on steep, intensely cropped...

Performance of grass and rainforest riparian buffers in the wet tropics, Far North Queensland. 2. Water quality.
July 1, 2004... Introduction There is general agreement that riparian buffers can significantly reduce sediment loads and concentrations from surface runoff (see overland flow, Goudie et al. 1994) in agricultural lands. Typically between 40 and 95% of the...