Australian Journal of Soil Research articles from July 2005

Australian Journal of Soil Research archives from July 2005

Rapid internal drainage rates in Ferrosols.
July 1, 2005... Introduction The Red Ferrosols of the inland Burnett region of southeast Queensland support predominantly rain-fed cropping systems producing summer grain legume and cereal grain crops. One common characteristic of these soils after...

Field study of pesticide leaching in a Himatangi sand (Manawatu) and in a Kiripaka bouldery clay loam (Northland). 1. Results.
July 1, 2005... Introduction While the majority of groundwaters in New Zealand appear free from pesticide contamination (Ministry for the Environment 1997), recent New Zealand-wide targeted surveys in 1998 and 2004 have detected pesticides in 35% and 21%...

Field study of pesticide leaching in a Himatangi sand (Manawatu) and a Kiripaka bouldery clay loam (Northland). 2. Simulation using LEACHM, HYDRUS-1D, GLEAMS, and SPASMO models.
July 1, 2005... Introduction Simulation models typically integrate theoretical concepts, empirical knowledge, numerical algorithms, and statistical considerations to predict environmental parameters of interest. Such models are increasingly used...

Copper behaviour in a Podosol. 1. pH-dependent sorption-desorption, sorption isotherm analysis, and aqueous speciation modeling.
July 1, 2005... Introduction Copper (Cu) is an essential micronutrient required for plant growth, and is normally found in soils only in trace amounts. The Cu concentrations in uncontaminated soils range from 2 to 100mg/kg, with a worldwide mean...

Copper behaviour in a Podosol. 2. Sorption reversibility, geochemical partitioning, and column leaching.
July 1, 2005... Introduction Sorption-desorption processes have been found to be an important aspect of Cu behaviour in soils (McBride 1989; McLaren 2003). The previous paper in this series has demonstrated that Cu sorption to a Podosol was heavily...

Total soluble nitrogen in forest soils as determined by persulfate oxidation and by high temperature catalytic oxidation.
July 1, 2005... Introduction Soil soluble nitrogen (N) pools, including mineral N (N[H.sub.4.sup.+], N[O.sub.3.sup.-], and N[O.sub.2.sup.-]) and soluble organic fractions (e.g. amino acids and peptides), play a vital role in N cycling in forest ecosystems...

Soil physical quality under cattle grazing of a winter-fed brassica crop.
July 1, 2005... Introduction In New Zealand, wintering dairy cows at high densities on pastures is common in the Waikato region (Drewry 2003), but in southern regions, dairy cows are often wintered off the milking area of the farm and grazed on brassica...

Temperature effects on water absorption by three different porous materials.
July 1, 2005... Introduction Effects of temperature on liquid water flow in porous materials are attributed to the temperature dependences of the kinematic viscosity and of the surface tension of water as tabulated in standard physical tables (e.g. Weast...

Methods of pH determination in calcareous soils: use of electrolytes and suspension effect.(Short Communication)
July 1, 2005... Introduction Soil pH is fundamental to the understanding of soil systems, because it is an indicator of many reactions in the soil (Moore and Loeppert 1987). Measurement of soil pH is highly technique dependent, in that many soil...

Application of two amendments (gypsum and langbeinite) to reclaim sodic soil using sodic irrigation water.(Short Communication)
July 1, 2005... Introduction One common soil management problem in arid and semiarid regions is accumulation of high levels of exchangeable Na under irrigation with sodic water. Researchers believe that a soil with an exchangeable sodium percentage (ESP)...

Influence of soil structure on the shrinkage behaviour of a soil irrigated with saline-sodic water.
July 1, 2005... Introduction Soil aggregate formation due to swelling/shrinkage processes, as well as improved aggregate strength, affects water and ion transport through stable soil pore structure. In swelling soils, however, the pore systems are not...