Australian Journal of Soil Research articles from September 2002

Australian Journal of Soil Research archives from September 2002

Nitrate in soil humic acids revealed by [sup.14]N nuclear magnetic resonance spectroscopy.
September 1, 2002... Introduction Both amount and composition of soil organic matter (SOM) can significantly influence important carbon (C) and (N) cycling processes in terrestrial ecosystems (Schnitzer 1991; Vitousek et al. 1997; Schulten and Schnitzer 1998;...

Nitrification in a Vertisol subsoil and its relationship to the accumulation of ammonium-nitrogen at depth.
September 1, 2002... Introduction Nitrogen is often one of the most limiting nutrients for plant growth, and consequently, obtaining and maintaining sources of nitrogen in cropping systems is extremely important. On a Vertisol in south-east Queensland, high...

Gaseous nitrogen losses from urea applied to maize on a calcareous fluvo-aquic soil in the North China Plain.
September 1, 2002... Introduction China accounts for more than one-quarter of the total fertiliser N used in the world (FAO 1998). However, the recovery of fertiliser N by crops is generally low because of gaseous losses from the soil and fertiliser by...

The potential impact of long-term copper fungicide usage on soil microbial biomass and microbial activity in an avocado orchard.
September 1, 2002... Introduction Foliar application of copper (Cu), in the ammonium acetate, oxychloride, hydroxide, or sulfate form, is extensive in Australian horticultural industries for the control of a range of fungal diseases such as downy mildew...

Effect of biosolids compost on two NSW coastal soils used to grow vegetables.(New South Wales)
September 1, 2002... Introduction Historically, most sewage from towns on the coast of New South Wales (NSW), including the city of Sydney, has been primary treated and then dumped into the ocean (Hope 1996). Beneficial alternatives to disposal of Sydney's...

Influence of pH on a secondary effect of phosphate reaction: the decrease in sorption of newly added phosphate.
September 1, 2002... Introduction When specifically sorbed ions react with soil, the charge on the soil is changed. Anions make it more negative; cations more positive. With increasing time, it appears that the reacting ion penetrates towards the centre of the...

Prediction of K-Ca-Mg ternary exchange from binary isotherms in volcanic soils using the Rothmund-Kornfeld approach.
September 1, 2002... Introduction Cation exchange equilibria in soils involve the simultaneous competition of several ions. The full description of these systems requires a large number of equations and experiments whose design is very complex. On the other...

Mobility and distribution of zinc forms in columns of an acid, a neutral, and a calcareous soil treated with three organic zinc complexes under laboratory conditions.
September 1, 2002... Introduction The mobility and leaching of the Zn depends on its concentration in the soil, the soil properties, and environmental factors. The downward movement of soluble Zn complexes in soil profiles has received attention because even...

Effects of Bauxsol[TM] on the immobilisation of soluble acid and environmentally significant metals in acid sulfate soils.
September 1, 2002... Introduction The agricultural, engineering and environmental problems associated with improper uses of acid sulfate soils have been well recognised (Dent 1986; White et al. 1997). Acid sulfate soils contain metal sulfides (mainly pyrite),...

Measurement and prediction of permethrin persistence in six Malaysian agricultural soils.
September 1, 2002... Introduction The fate of pesticides in soils is greatly influenced by their interaction with the soil environment. It is now well established that the persistence of most pesticides is influenced by the organic matter content of the soil...

Reclamation of steeply sloping coal spoil banks under Mediterranean semi-arid climate.
September 1, 2002... Introduction Mining activities can cause severe environmental impact and degradation if reclamation measures are not taken. Deep coal mining activities in the Ebro Valley (NE Spain) are important elements in the economy of the region. Mine...

A pedo-transfer function (PTF) for estimating soil bulk density from basic soil data and its comparison with existing PTFs.
September 1, 2002... Introduction Bulk density is a key parameter used in many soil hydrologic models for predicting a wide range of soil processes. The influence of many soil management practices on the soil properties that affect water movement and retention...

Organic matter characteristics under native forest, long-term pasture, and recent conversion to Eucalyptus plantations in Western Australia: microbial biomass, soil respiration, and permanganate oxidation.
September 1, 2002... Introduction Extensive areas of native vegetation in south-western Australia have been cleared within the last century for agricultural production, with the majority used for pasture-based agriculture. Conversion from native vegetation to...

Soil properties of a widely spaced, planted poplar (Populus deltoides)--pasture system in a hill environment.
September 1, 2002... Introduction Soil erosion is common in New Zealand on sedimentary mudstones, siltstones, and pumice soils (Kelliher et al. 1995). Most of the slip, slump, and gully erosion has been a consequence of forest clearing for pastoral agriculture...