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    Academic Journals

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• The effects of clay and sand additions on the strength of sandy topsoils

  Authors:R.J. Harper and R.J. GilkesFrom:Australian Journal of Soil Research (Vol. 42, Issue 1) Peer-Reviewed

  Jan. 20043,273 words Article The clay contents of sandy soils in south-western Australia are often modified, either intentionally or inadvertently, as a result of management practices and erosion. Although the strength of sandy surfaced soils has...

• Relationships of water repellency to soil properties for different spatial scales of study

  Authors:I. McKissock, R.J. Gilkes, R.J. Harper, and D.J. CarterFrom:Australian Journal of Soil Research (Vol. 36, Issue 3) Peer-Reviewed

  May-June 19984,316 words Article The correlation between water repellency and soil properties provides general indications, but does not yield consistently predictable results. Repellency was measured by water drop penetration time in seconds (WDPT). In...

• Dissolution of milled-silicate rock fertilisers in the soil

  Authors:J. Priyono and R.J. GilkesFrom:Australian Journal of Soil Research (Vol. 42, Issue 4) Peer-Reviewed

  July 20044,180 words Article Dissolution of dry-milled basalt, dolerite, gneiss, and K-feldspar added to 23 soils has been related to milling time and soil properties. The rocks milled for 10, 60, and 120 min were mixed with 23 type of soils from...

• The systematic effect of soil P buffer capacity on Colwell soil P test v. plant response calibration exists only when field experiments are adjacent

  Authors:M.D.A. Bolland and R.J. GilkesFrom:Australian Journal of Soil Research (Vol. 42, Issue 7) Peer-Reviewed

  Dec. 20042,013 words Article Thirteen field experiments distributed throughout south-western Australia examined the relationship between percentage of maximum grain yield of wheat (Triticum aestivum L. cv. Aroona) and Colwell soil phosphorus (P)...

• Microstructure and water retention of Oxisols in Thailand

  Authors:S. Tawornpruek, I. Kheoruenromne, A. Suddhiprakarn, and R.J. GilkesFrom:Australian Journal of Soil Research (Vol. 44, Issue 2) Peer-Reviewed

  Mar. 20064,726 words Article The moisture characteristics and related pore size distributions of Thai Oxisols were determined for 11 representative pedons. These soils are Kandiustox and Kandiudox located in the North-east Plateau, South-east...

• Fractionation of trace elements in some non-agricultural Australian soils

  Authors:J. Li, A.W. Rate, and R.J. GilkesFrom:Australian Journal of Soil Research (Vol. 41, Issue 7) Peer-Reviewed

  Dec. 20034,414 words Article The fractionation of Ag, Ba, Co, Cr, Cu, Ni, Pb, V, and Zn in highly weathered soils was investigated using 5 operationally defined fractions: exchangeable, organic, amorphous Fe oxides, crystalline Fe oxides, and...

• Mineralogical properties of sandy podzols on the Swan Coastal Plain, south-west Australia, and the effects of drying on their phosphate sorption characteristics

  Authors:J.Z. He, R.J. Gilkes, and G.M. DimmockFrom:Australian Journal of Soil Research (Vol. 36, Issue 3) Peer-Reviewed

  May-June 19985,036 words Article Sorption of phosphorus for sandy soil regions is affected by several variables. In both laboratory and on-site summer tests, sorption was boosted by air-drying. Other factors increasing sorption include organic carbon,...

• Phosphorus transformations and their relationships with calcareous soil properties of southern Western Australia

  Authors:Abbas Samadi and R.J. GilkesFrom:Soil Science Society of America Journal (Vol. 63, Issue 4) Peer-Reviewed

  July-August 1999228 words Article

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• The relationship of soil water repellency to aliphatic C and kaolin measured using DRIFT

  Authors:I. McKissock, R.J. Gilkes, and W. van BronswijkFrom:Australian Journal of Soil Research (Vol. 41, Issue 2) Peer-Reviewed

  Mar. 20036,188 words Article In general, water repellency by soil increases with the increase of total organic matter and decreases as the clay and silt contents of the soil increase. The prediction of water repellency from soil organic carbon...

• Surface charge characteristics of variable charge soils in Thailand

  Authors:W. Wisawapipat, I. Kheoruenromne, A. Suddhiprakarn, and R.J. GilkesFrom:Australian Journal of Soil Research (Vol. 48, Issue 4) Peer-Reviewed

  July 20108,203 words Report Surface charge characteristics were investigated using a charge fingerprinting procedure for 90 samples from 32 profiles of highly weathered Oxisols and Ultisols derived from shale/limestone, basalt, granite, local...

• Micromorphology and electron microprobe analysis of phosphorus and potassium forms of an Indian Black Earth (IBE) anthrosol from Western Amazonia

  Authors:C.E.G.R. Schaefer, H.N. Lima, R.J. Gilkes, and J.W.V. MelloFrom:Australian Journal of Soil Research (Vol. 42, Issue 4) Peer-Reviewed

  July 20043,124 words Article The Indian black earth (IBE) anthrosols (Terra Preta) overlying deep weathered kaolinitic soils of Western Amazonia represent one of the most interesting features of the Amazon Basin, with broad implications to human...

• Extractable iron and aluminium predict the P sorption capacity of Thai soils

  Authors:W. Wiriyakitnateekul, A. Suddhiprakarn, I. Kheuruenromne, and R.J. GilkesFrom:Australian Journal of Soil Research (Vol. 43, Issue 7) Peer-Reviewed

  Nov. 20054,882 words Article The objective of this study was to determine if dithionite- and oxalate-extractable Fe and Al can be used to predict the P sorption capacity of Thai soils. Forty-five samples from diverse soil types were taken from...

• A procedure for mapping the depth to the texture contrast horizon of duplex soils in south-western Australia using ground penetrating radar, GPS and kriging

  Authors:M.A. Simeoni, P.D. Galloway, A.J. O'Neil, and R.J. GilkesFrom:Australian Journal of Soil Research (Vol. 47, Issue 6) Peer-Reviewed

  Sept. 20094,825 words Report A procedure for the rapid and accurate mapping of the depth to the texture contrast horizon of duplex soils was trialled. Data were collected using ground-penetrating radar with a 250 MHz antenna at 4 sites in the...

• Mineral sources of potassium to plants for seven soils from south-western Australia

  Authors:Y. Pal, R.J. Gilkes, and M.T.F. WongFrom:Australian Journal of Soil Research (Vol. 40, Issue 8) Peer-Reviewed

  Dec. 15, 20025,007 words Article This investigation was conducted with surface horizon samples from 7 south-western Australian soils and their 3 size fractions (sand, silt, and clay). The K release of these materials was measured for several...

• Properties of regolith beneath lateritic bauxite in the Darling Range of south Western Australia

  Authors:G.A. Kew and R.J. GilkesFrom:Australian Journal of Soil Research (Vol. 45, Issue 3) Peer-Reviewed

  May 20077,608 words Article 1570LA morphological key has been developed for regolith that is exposed during mining of lateritic bauxite in Darling Range of south Western Australia. The key distinguishes materials with different mineralogical and...

• Effect of humic acid, sodium, and calcium additions on the formation of water-stable aggregates in Western Australian wheatbelt soils

  Authors:T. Yamaguchi, T. Takei, Y. Yazawa, M.T.F. Wong, R.J. Gilkes, and R.S. SwiftFrom:Australian Journal of Soil Research (Vol. 42, Issue 4) Peer-Reviewed

  July 20042,748 words Article The effect of humic acids extracted from coal waste and peat on the formation of water-stable aggregates in kaolinitic soils from the wheatbelt of Western Australia and a prepared kaolinite-quartz mix were assessed....

• The liming effect of bauxite processing residue (red mud) on sandy soils

  Authors:K.E. Snars, R.J. Gilkes, and M.T.F. WongFrom:Australian Journal of Soil Research (Vol. 42, Issue 3) Peer-Reviewed

  May 20044,024 words Article Bauxite residue (red mud) is produced in large amounts in alumina refineries as a waste product of the Bayer process. This material has the potential to be used as a soil liming agent due to its high pH and high acid...

• A laboratory and glasshouse evaluation of chicken litter ash, wood ash, and iron smelting slag as liming agents and P fertilisers

  Authors:B.E. Yusiharni, H. Ziadi, and R.J. GilkesFrom:Australian Journal of Soil Research (Vol. 45, Issue 5) Peer-Reviewed

  Aug. 20076,547 words Report 1540LStandard AOAC methods of chemical analysis have been used to characterise the industrial byproducts partly burnt chicken litter ash (CLA), totally burnt chicken litter ash (CLAT), wood ash (WA), and iron smelting slag,...

• Forms of phosphorus in virgin and fertilised calcareous soils of Western Australia

  Authors:Abbas Samadi and R.J. GilkesFrom:Australian Journal of Soil Research (Vol. 36, Issue 4) Peer-Reviewed

  July-August 19985,624 words Article Total phosphorus (P), inorganic P ([P.sub.i]), organic P, and several [P.sub.i] fractions were determined for 8 fertilised calcareous soils under agriculture and their virgin analogues under natural bush to ascertain...

• Relationships between fabric, water retention, and strength of hard subsoils in the south of Western Australia

  Authors:G.A. Kew, R.J. Gilkes, and D. EvansFrom:Australian Journal of Soil Research (Vol. 48, Issue 2) Peer-Reviewed

  Mar. 20104,165 words Report Crop yield in the sandy soils of the Western Australian wheatbelt is influenced strongly by the plant-available water (PAW) and strength of subsoils. The fabric of hard subsoils of fluvial and aeolian origin has been...