Australian Journal of Soil Research articles from July 2003

Australian Journal of Soil Research archives from July 2003

Risk assessment of phosphorus loss from sugarcane soils--a tool to promote improved management of P fertiliser.(Author Abstract)
July 1, 2003... Introduction The export of sediments and nutrients from agricultural land continues to generate concern and debate in coastal Queensland. As part of this debate, the Great Barrier Reef Marine Park Authority (GBRMPA) has recently published...

Increased P application to lateritic soil in 1976 increased Colwell soil test P for P applied in 2000. (Short Communication).(Author Abstract)
July 1, 2003... Introduction Adding phosphorus (P) to acidic lateritic soils in Western Australia (WA) decreased the capacity of the soils to sorb subsequent applications of P (Barrow 1974, 1999; Barrow et al. 1998). Consequently, the effectiveness for...

Soil properties as predictors of yield response of clover (Trifolium subterraneum L.) to added P in soils of varying P sorption capacity. (Short Communication).(Author Abstract)
July 1, 2003... Introduction Knowledge of the relationships between (1) plant yield and the amount of P applied (the yield response curve) and (2) yield and soil test P (the soil P test calibration) is required to provide P fertiliser advice (McLaughlin...

The relationship between animal foraging and nutrient patchiness in south-west Australian woodland soils.(Author Abstract)
July 1, 2003... Introduction Despite a long recognition that burrowing vertebrates may influence soil characteristics and soil formation processes (Grinnell 1923; Greene and Reynard 1932), few published experiments have quantified this relationship....

The influence of cutting and grazing on phosphorus and nitrogen in irrigation runoff from perennial pasture.(Author Abstract)
July 1, 2003... Introduction The irrigated-dairy industry in northern Victoria and southern New South Wales produces about 26% of Australia's milk (Fulkerson and Doyle 2001). The vast majority of irrigated dairy farms in this region are pasture based and...

Nitrate ammonification and its relationship to the accumulation of ammonium in a Vertisol subsoil.(Author Abstract)
July 1, 2003... Introduction In a Vertisol soil in south-east Queensland, high concentrations of exchangeable ammonium (up to 270 kg N/ha) have been observed between 1.2 and 3 m (Hossain et al. 1996). Given that nitrogen (N) is often one of the most...

Relative effect of climate, soil, and management on risk of nitrate leaching under wheat production in Canterbury, New Zealand.(Author Abstract)
July 1, 2003... Introduction Nitrate in groundwater is a major environmental contaminant in some regions of New Zealand and internationally. Many factors affect the concentration of nitrate in groundwater. The main environmental/land-use domains affecting...

Volatilisation of nitrogen from land applied biosolids. (Short Communication).(Author Abstract)
July 1, 2003... Introduction Land application of biosolids has the potential to increase plant productivity but also to leach nitrogen (N) to groundwater. In current land application programs in New Zealand (Nelson and Christchurch), the application rate...

Total C and N storage and organic C pools of a Red-Yellow Podzolic under conventional and no tillage at the Atlantic Forest Zone, south-eastern Brazil.(Author Abstract)
July 1, 2003... Introduction The soil contains a significant part of the global carbon (C) stock: 3.5% compared with up to 1.7% in the atmosphere, 8.9% in fossil fuels, 1.0% in biota, and 84.9% in oceans (Lal et al. 1995). With increasing emission of...

Effects of lanthanum on dehydrogenase activity and carbon dioxide evolution in a Haplic Acrisol.(Author Abstract)
July 1, 2003... Introduction Rare earth elements (REEs) are a group of 17 trivalent metallic elements which have similar chemical properties, and their relative atomic mass varies from 139 (lanthanum) to 175 (lutetium). Also commonly included in the group...

Urea hydrolysis and inorganic N in a Luvisol after application of fertiliser containing rare-earth elements. (Short Communication).(Author Abstract)
July 1, 2003... Introduction China contains around 80% of the world's resource of rare earths and is a major producer of them for the world market (Brown et al. 1990). Considerable work has shown that the application of rare earths at a suitable rate can...

Contrasting behaviour of chlorpyrifos and its primary metabolite, TCP (3,5,6-trichloro-2-pyridinol), with depth in soil profiles.(Author Abstract)
July 1, 2003... Introduction Chlorpyrifos (O,O-diethyl O-(3,5,6-trichloro-2-pyridyl)-phosphorothioate) is a broadspectrum organophosphorus insecticide, which is commonly used worldwide. For example, in the USA approximately 10 million kg of chlorpyrifos...

E[C.sub.1:5]/exchangeable Na, a sodicity index for cotton farming systems in irrigated and rainfed Vertosols. (Short Communication).(Author Abstract)
July 1, 2003... Introduction Soils which contain high amounts of exchangeable sodium are described as being 'sodic'. A study commissioned by the Cooperative Research Centre for Soil and Land Management in 1997 estimated that in Australia soil sodicity...

Parameterisation of physically based solute transport models in sandy soils.(Author Abstract)
July 1, 2003... Introduction Although primarily a process reported in structured soils, the non-equilibrium behaviour of tracers had also been observed in sands and granular material (De Smedt and Wierenga 1984; Bond and Wierenga 1990; Ghodrati and Jury...

Tillage erosion intensity in the South Canterbury Downlands, New Zealand.(Author Abstract)
July 1, 2003... Introduction There is growing awareness of the pressure on land resources at global, regional, and national scales (e.g. Greenland et al. 1997) and, especially in developed countries, there is an increasing interest in land management...