Australian Journal of Soil Research articles from June 2008

Australian Journal of Soil Research archives from June 2008

Prospects of improving efficiency of fertiliser nitrogen in Australian agriculture: a review of enhanced efficiency fertilizers.(Report)
June 1, 2008... Abstract. Fertiliser nitrogen use in Australia has increased from 35 Gg N in 1961 to 972 Gg N in 2002, and most of the nitrogen is used for growing cereals. However, the nitrogen is not used efficiently, and wheat plants, for example,...

Salmonella uptake in sheep exposed to pastures after biosolids application to agricultural land.(Report)
June 1, 2008... Abstract. Young adult sheep grazing pasture on land treated with dewatered biosolids 1-3 weeks before pasture sowing were used to assess the risk of transfer of Salmonella spp. from biosolids to the food chain. Monthly determinations of...

The fate of phosphorus under contrasting border-check irrigation regimes.(Report)
June 1, 2008... Abstract. Flood-irrigation, to the extent that outwash (runoff from border-check bays) occurs, is a major cause of P loss from grazed pastures and has potential to harm surface water quality. We used a combination of rainfall simulation to...

Modeling time-dependent phosphate buffering capacity in different soils as affected by bicarbonate and silicate ions.(Report)
June 1, 2008... Abstract. The aim of this paper was to establish a relationship between phosphate buffering capacity and time in the presence of specifically sorbed anions like bicarbonate and silicate. P sorption isotherms were obtained at different times of...

Soil N process inhibitors alter nitrogen leaching dynamics in a pumice soil.(Report)
June 1, 2008... Abstract. A field lysimeter experiment, using a free-draining pumice soil, was carried out to investigate the effect of different soil nitrogen (N) process inhibitors on the fate of [sup.15]N-labelled cow urine. The treatments were a urease...

Losses of nitrogen fertiliser under oil palm in Papua New Guinea: 1. Water balance, and nitrogen in soil solution and runoff.(Report)
June 1, 2008... Abstract. Nitrogen (N) fertiliser is an important and expensive input to oil palm in Papua New Guinea. Of about 3000 mm/year of rainfall, about 1300 mm is lost as evaporation. This leaves an excess of > 1000 mm/year lost as surface runoff...

Losses of nitrogen fertiliser under oil palm in Papua New Guinea: 2. Nitrogen transformations and leaching, and a residence time model *.(Report)
June 1, 2008... Abstract. Nitrogen fertiliser is an expensive input to oil palm in Papua New Guinea, and prone to leaching due to the about 3000 mm/year of rainfall. Transfer function theory is used to describe this leaching, and to devise ways of reducing it....

Comparing the effects of continuous and time-controlled grazing systems on soil characteristics in Southeast Queensland.(Report)
June 1, 2008... Abstract. Grazing by livestock has a great influence on soil characteristics with major effects on soil carbon and nitrogen cycling in grazing lands. Grazing practices affect soil properties in different ways depending on the prescribed...

Land-use effects on soil properties on the north-western slopes of New South Wales: Implications for soil condition assessment.(Report)
June 1, 2008... Abstract. In Australia, as elsewhere, there is a growing need for information relating to soil condition, its current status, and the nature and direction of change in response to management pressures. This information is required by land...

Evaluation of long-term soil management practices using key indicators and soil quality indices in a semi-arid tropical Alfisol.(Report)
June 1, 2008... Abstract. Alfisol soils of rainfed semi-arid tropics (SAT) are degrading due to several physical, chemical, and biological constraints. Appropriate soil-nutrient management practices may help to check further soil degradation. A long-term...

Soil organic carbon stocks in saline and sodic landscapes.(Report)
June 1, 2008... Abstract. Increasing salinity (high levels of water-soluble salts) and sodicity (high levels of exchangeable sodium) are serious land degradation issues worldwide. In Australia, salinity and sodicity affect a large proportion of the landscape...

Changes in soil microbial biomass and community composition along vegetation zonation in a coastal sand dune.(Report)
June 1, 2008... Abstract. We used phospholipid fatty acid (PLFA) analysis to examine the relation of microbial biomass and community composition to vegetation zonation on a coastal sand dune. Soil samples were collected along 3 line transects established from...

Improved drainage and greater air-filled porosity of raised beds in south- western Victoria.(Report)
June 1, 2008... Abstract. Crop production in south-western Victoria has historically been constrained by waterlogging. As a result raised beds have recently become a popular tillage method on soils prone to waterlogging. Soil water properties, air-filled...