Australian Journal of Soil Research articles from May 1998

Australian Journal of Soil Research archives from May 1998

Effect of previous additions of superphosphate on sorption of phosphate.
May 1, 1998... Abstract Samples of the topsoil were collected from plots of 8 field experiments which had been fertilised with P at several rates from 8 months to more than 4 years previously. Phosphate sorption curves were measured and described by the...

Effect of forms of nitrogen supply on mobilisation of phosphorus from a phosphate rock and acidification in the rhizosphere of tea.
May 1, 1998... Abstract Nitrogen (N) is the main fertiliser input to tea plantations because of the large removal of this element with regular harvests of young shoots in the field. The form of N supply is known to influence the uptake of other plant...

Relating phosphorus quantity, intensity, and buffer capacity to phosphorus uptake.
May 1, 1998... Abstract The short-term (25 days) phosphorus (P) uptake by maize has been reported to be most strongly correlated with measurements of P intensity in soil. Correlations of P uptake with bicarbonate-extractable P (a measure of the quantity...

Mineralogical properties of sandy podzols on the Swan Coastal Plain, south-west Australia, and the effects of drying on their phosphate sorption characteristics.
May 1, 1998... Abstract Very sandy and sometimes seasonally inundated humus podzols of the Bassendean soil association in southwest Australia experience severe leaching of fertiliser P with consequent eutrophication of waterways. P sorption by these...

Relationship between clay mineralogy and exchangeable Al in red and yellow soils from the Islands of Okinawa and Java. (aluminum)
May 1, 1998... Abstract Red and yellow soils from tropical regions are generally more mature than their subtropical counterparts. Most of these soils contain kaolin as the dominant clay mineral. Exchangeable aluminium (Al) generally balances permanent...

Changes in kaolinite, vermiculite, and smectite clays after adsorption by hydroxy-chromium species.
May 1, 1998... Abstract Kaolinite, vermiculite, and montmorillonites were treated with solutions containing hydroxychromium (OH-Cr) species. The OH-Cr solution was prepared by adding 0.2 m NaOH to 0.1 m chromium nitrate solution and allowing the...

The influence of the soil matrix on nitrogen mineralisation and nitrification: spatial variation and a hierarchy of soil properties.(part 1)
May 1, 1998... Abstract Natural heterogeneity of soil properties was used to explore their influence on nitrogen (N) mineralisation and nitrification in undisturbed small soil volumes (soil cells; c. 1.7 [cm.sup.3] sampled from a small field plot (2 m...

Effects of metsulfuron-methyl on amylase, urease, and protease activities in two soils.
May 1, 1998... Abstract Effects of metsulfuron-methyl on the activities of amylase, urease, and protease in loamy sand (Sungai Buluh series) and clay loam soil (Lating series) were evaluated for up to 28 days. Metsulfuron-methyl at 5.0 [Micron]g/g...

Influence of plants and cropping on microbiological characteristics of some new Caledonian ultramafic soils.
May 1, 1998... Abstract Five New Caledonian ultramafic soils were compared for their bacterial and fungal population densities and for their microbial activity estimated by fluorescein diacetate (FDA) hydrolysis. The low microbial numbers and activities...

Monitoring salinity of the soil solution in a citrus orchard: the 4P technique revisited. (four-electrode resistivity technique)
May 1, 1998... Abstract During a 6-year salinity experiment in a citrus (Shamouti) grove, 3 salinity levels of irrigation water (0.8, 1.3, and 1.7 dS/m) were used. Measured salinity levels depended on the monitoring technique, aqueous extract (Ext) v....

Computed tomography data on soil structural and hydraulic parameters assessed for spatial continuity by semivariance geostatistics.
May 1, 1998... Abstract Visual observations on the spatial distribution, at 1-cm intervals, of bulk density ([rho]), Porosity ([epsilon]), fractal dimension (D), water content ([theta]), and unsaturated hydraulic conductivity ([K.sub.us]) in uniformly...

Relationships of water repellency to soil properties for different spatial scales of study.
May 1, 1998... Abstract In order to predict the occurrence of water repellency, which is a labile property, from field survey data obtained throughout the year, it is necessary to identify predictive relationships between water repellency and commonly...

Evaluating drainage responses in duplex soils in a Mediterranean environment.
May 1, 1998... Abstract Deep drainage below 0.5 m from a sloping duplex soil under a pasture in south-western Australia was evaluated by water balance determinations over durations of a few days. Soil water dynamics were measured with time domain...

A rainsplash component analysis to define mechanisms of soil detachment and transportation.
May 1, 1998... Abstract Rainsplash is a term that has been used to describe a wide variety of effects caused by the impact of raindrops on soils. This is because rainsplash, even by individual drops, is not a single process but a combination of several...