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Journal articles on the topic 'Plant-soil relationships – Western Australia'

Author: Grafiati

Published: 4 June 2021

Last updated: 19 February 2022

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1

Pate, J. S., W. H. Verboom, and P. D. Galloway. "Co-occurrence of Proteaceae, laterite and related oligotrophic soils: coincidental associations or causative inter-relationships?" Australian Journal of Botany 49, no. 5 (2001): 529. http://dx.doi.org/10.1071/bt00086.

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This communication presents the hypothesis that certain Australian lateritic and related oligotrophic soils may have been partly derived biotically from soluble iron-rich complexes generated following secretion of low-molecular weight organic acids by phosphate-absorbing specialised proteoid (cluster) roots of proteaceous plants. Subsequent precipitation of the iron is then pictured as occurring onto the oxide rinds of developing laterite after consumption of the organic components of the complexes by soil bacteria. The hypothesis is f irst examined in relation to current theories of origins o

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2

Wong, M. T. F., and R. J. Harper. "Use of on-ground gamma-ray spectrometry to measure plant-available potassium and other topsoil attributes." Soil Research 37, no. 2 (1999): 267. http://dx.doi.org/10.1071/s98038.

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The incidence of potassium (K) deficiency is increasing in crops, pastures, and forestry in south-western Australia. Although soil K can be measured using soil sampling and analysis, γ-ray spectrometry offers a potentially cheaper and spatially more precise alternative. This could be particularly useful in precision agriculture, where inputs are applied according to need rather than by general prescription. In a study of topsoils near Jerramungup, Western Australia, strong relationships (r2 = 0·9) were found between on-ground counts of γ-rays derived from 40K (γ-K) and both total K and plant-a

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3

Wong, M. T. F., R. J. Corner, and S. E. Cook. "A decision support system for mapping the site-specific potassium requirement of wheat in the field." Australian Journal of Experimental Agriculture 41, no. 5 (2001): 655. http://dx.doi.org/10.1071/ea00191.

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The intensely weathered nature of Western Australian cropping soils and the long history of potassium depletion by the farming system has resulted in increased incidence of potassium deficiency in wheat. There is currently no scientifically based method for potassium recommendation in Western Australia. This paper describes the use of site-specific plot-scale field trials carried out in 1995–98 and a crop response model to develop a generally applicable potassium recommendation system. Geographic information system technology was used to extend the uniform potassium recommendation system into

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Samadi, Abbas, and R. J. Gilkes. "Phosphorus Transformations and Their Relationships with Calcareous Soil Properties of Southern Western Australia." Soil Science Society of America Journal 63, no. 4 (July 1999): 809–15. http://dx.doi.org/10.2136/sssaj1999.634809x.

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Wong, M. T. F., R. W. Bell, and K. Frost. "Mapping boron deficiency risk in soils of south-west Western Australia using a weight of evidence model." Soil Research 43, no. 7 (2005): 811. http://dx.doi.org/10.1071/sr05022.

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The aim of this work was to develop a risk map for boron (B) deficiency in the grain cropping regions of Western Australia (WA), whilst avoiding the high costs associated with direct B measurements for an area as vast as the south-west of WA. The study firstly determined relationships between 0.01 m CaCl2-extractable soil B levels and readily available data on soil properties and parent materials for Reference Soils of south-west Australia and secondly assembled direct evidence of B deficiency risk from surveys of farmers’ crops and soils and from glasshouse experiments. Across 73 Reference So

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6

Bolland, MDA, IR Wilson, and DG Allen. "Effect of P-buffer capacity and P-retention index of soils on soil test-P, soil test P-calibrations and yield response curvature." Soil Research 32, no. 3 (1994): 503. http://dx.doi.org/10.1071/sr9940503.

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Twenty-three virgin Western Australian soils of different buffer capacities (BC) for phosphorus (P) were collected. The effects of BC on the relationships between Colwell soil test P and the level of P applied, yield and soil test P, and yield and the level of P applied were studied. Wheat (Triticum aestivum cv. Reeves), grown for 27 days in a glasshouse, was used. Two methods of measuring P sorption of soils, P buffer capacity (PBC) and P retention index (PRI), were used. The PBC is determined from a multi-point sorption curve. The PRI is a new, diagnostic, one-point, sorption method now wide

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7

Taylor, Miranda J., Keith Smettem, Gabriella Pracilio, and William Verboom. "Relationships Between Soil Properties and High-Resolution Radiometrics, Central Eastern Wheatbelt, Western Australia." Exploration Geophysics 33, no. 2 (June 2002): 95–102. http://dx.doi.org/10.1071/eg02095.

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8

Anderson, Geoffrey, and Richard Bell. "Wheat grain-yield response to lime application: relationships with soil pH and aluminium in Western Australia." Crop and Pasture Science 70, no. 4 (2019): 295. http://dx.doi.org/10.1071/cp19033.

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Soil acidity, or more specifically aluminium (Al) toxicity, is a major soil limitation to growing wheat (Triticum aestivum L.) in the south of Western Australia (SWA). Application of calcium carbonate (lime) is used to correct Al toxicity by increasing soil pH and decreasing soluble soil Al3+. Soil testing using a 0.01 m calcium chloride (CaCl2) solution can measure both soil pH (pHCaCl2) and soil Al (AlCaCl2) for recommending rates of lime application. This study aimed to determine which combination of soil pHCaCl2 or soil AlCaCl2 and sampling depth best explains the wheat grain-yield increas

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Coates, Fiona, and J. B. Kirkpatrick. "Is Geographic Range Correlated with Climatic Range in Australian Spyridium Taxa?" Australian Journal of Botany 47, no. 5 (1999): 755. http://dx.doi.org/10.1071/bt97066.

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The major centres of local endemism and richness at the species level and below in Spyridium Fenzl are located on the southern coast of Western Australia and in south-eastern South Australia. There are only a few Spyridium taxa with ranges that transgress the boundaries of the following four regions: south- western Western Australia; south-eastern South Australia and western Victoria; eastern Victoria, New South Wales and southern Queensland; Tasmania. Synthetic climatic variables were generated for all recorded populations of Spyridium taxa. Variabilities in these were related to the maximum

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10

O'Rourke, Tiernan A., Tim T. Scanlon, Megan H. Ryan, Len J. Wade, Alan C. McKay, Ian T. Riley, Hua Li, Krishnapillai Sivasithamparam, and Martin J. Barbetti. "Severity of root rot in mature subterranean clover and associated fungal pathogens in the wheatbelt of Western Australia." Crop and Pasture Science 60, no. 1 (2009): 43. http://dx.doi.org/10.1071/cp08187.

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Pasture decline is considered to be a serious challenge to agricultural productivity of subterranean clover across southern Australia. Root disease is a significant contributing factor to pasture decline. However, root disease assessments are generally carried out in the early part of the growing season and in areas predominantly sown to permanent pastures. For this reason, in spring 2004, a survey was undertaken to determine the severity of root disease in mature subterranean clover plants in pastures located in the wheatbelt of Western Australia. DNA-based soil assays were used to estimate p

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Bolland, M. D. A., D. G. Allen, and K. S. Walton. "Soil testing for phosphorus: comparing the Mehlich 3 and Colwell procedures for soils of south-western Australia." Soil Research 41, no. 6 (2003): 1185. http://dx.doi.org/10.1071/sr02153.

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Soil samples were collected from 14 long-term field experiments in south-western Australia to which several amounts of superphosphate or phosphate rock had been applied in a previous year. The samples were analysed for phosphorus (P) by the Colwell sodium bicarbonate procedure, presently used in Western Australia, and the Mehlich 3 procedure, being assessed as a new multi-element test for the region. For the Mehlich procedure, the concentration of total and inorganic P in the extract solution was measured. The soil test values were related to yields of crops and pasture measured later on in th

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Bell, Michael J., Wayne Strong, Denis Elliott, and Charlie Walker. "Soil nitrogen—crop response calibration relationships and criteria for winter cereal crops grown in Australia." Crop and Pasture Science 64, no. 5 (2013): 442. http://dx.doi.org/10.1071/cp12431.

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More than 1200 wheat and 120 barley experiments conducted in Australia to examine yield responses to applied nitrogen (N) fertiliser are contained in a national database of field crops nutrient research (BFDC National Database). The yield responses are accompanied by various pre-plant soil test data to quantify plant-available N and other indicators of soil fertility status or mineralisable N. A web application (BFDC Interrogator), developed to access the database, enables construction of calibrations between relative crop yield ((Y0/Ymax) × 100) and N soil test value. In this paper we report

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Barrett-Lennard, Edward G., Geoffrey C. Anderson, Karen W. Holmes, and Aidan Sinnott. "High soil sodicity and alkalinity cause transient salinity in south-western Australia." Soil Research 54, no. 4 (2016): 407. http://dx.doi.org/10.1071/sr15052.

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Transient salinity associated with increased dispersion of clays is arguably one of the most economically important soil constraints in Australia because it occurs on land that is regularly cropped. However, this issue is rarely studied. This paper examines the occurrence of transient salinity on agricultural land in the south-west of Western Australia and the factors causing it. We analysed four soil datasets from the region, collected at scales varying from the entire south-west to a single paddock. A variety of soil parameters were correlated with increased electrical conductivity (EC1:5).

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14

Kew, G. A., R. J. Gilkes, and D. Evans. "Relationships between fabric, water retention, and strength of hard subsoils in the south of Western Australia." Soil Research 48, no. 2 (2010): 167. http://dx.doi.org/10.1071/sr09080.

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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 compared with that of in situ saprolite materials that also occur as subsoils in Western Australia. A fabric classification was developed and relationships between, fabric, water retention, and strength were examined. The clay matrix of hard subsoils is denser and is less porous than in saprolite. Hard subsoils contain rounded quartz grains and transported, rounded aggregates of c

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MACFARLANE, TERRY D., GALINA V. DEGTJAREVA, TAHIR H. SAMIGULLIN, CARMEN M. VALIEJO-ROMAN, CONSTANTIN I. FOMICHEV, and DMITRY D. SOKOLOFF. "Althenia tzvelevii (Potamogetonaceae), a new species from SW Western Australia with bilocular anthers: morphology and molecular phylogenetic relationships." Phytotaxa 471, no. 3 (November 17, 2020): 193–207. http://dx.doi.org/10.11646/phytotaxa.471.3.2.

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A new species Althenia tzvelevii is described from south western Australia. This is the second species after A. bilocularis described with bilocular anthers. Illustrations of plant morphology are provided by means of SEM images and habitat photographs are included. The phylogenetic relationships of the new species were investigated using five plastid DNA markers (matK, ndhF, rbcL, rpoB, and rpoC1), with published sequences augmented by several new sequences resulting in coverage of all described species in the genus. Althenia tzvelevii forms a clade with A. patentifolia and A. bilocularis and

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Verboom, W. H., and J. S. Pate. "Relationships between cluster root-bearing taxa and laterite across landscapes in southwest Western Australia: an approach using airborne radiometric and digital elevation models." Plant and Soil 248, no. 1/2 (January 2003): 321–33. http://dx.doi.org/10.1023/a:1022358014629.

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17

Tindale, MD, and LA Craven. "Three new species of Glycine (Fabaceae: Phaseolae) from north-western Australia, with notes on amphicarpy in the genus." Australian Systematic Botany 1, no. 4 (1988): 399. http://dx.doi.org/10.1071/sb9880399.

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Three new species of Glycine Willd., viz. G. albicans, G. Lactovirens and G. hirticaulis from north-western Australia are described and illustrated. Their putative relationships are presented. A key is provided to the species of Glycine in north-western Australia. Two forms of amphicarpy occur within the genus Glycine.

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18

McKissock, I., R. J. Gilkes, R. J. Harper, and D. J. Carter. "Relationships of water repellency to soil properties for different spatial scales of study." Soil Research 36, no. 3 (1998): 495. http://dx.doi.org/10.1071/s97071.

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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 measured soil properties. This paper evaluates these relationships for diverse soil assemblages. These soil assemblages include a set of reference soils from the south-west of Western Australia (an area of 250 000 km2), more intensively sampled suites of soils in several smaller soil{landscape associations within the south-west of Western Australia (≅1000 km2), soils fr

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Stephens, D. J., and T. J. Lyons. "Rainfall-yield relationships across the Australian wheatbelt." Australian Journal of Agricultural Research 49, no. 2 (1998): 211. http://dx.doi.org/10.1071/a96139.

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A network of rainfall stations was selected across the Australian wheatbelt and monthly rainfall regressed with wheat yields from the surrounding shires for the period 1976-87. Yields were found to be strongly related to fluctuations in total rainfall amount and the seasonal distribution of rainfall through the year. These temporal relationships vary spatially and appear to be regulated by the water-holding capacity of regional soils. Sixteen agrometeorological zones were defined with similar rainfall-yield relationships. In all these, autumn rains that permit an early sowing, and finishing ra

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20

Perrie, Leon R., Daniel J. Ohlsen, Lara D. Shepherd, Michael Garrett, Patrick J. Brownsey, and Michael J. Bayly. "Tasmanian and Victorian populations of the fern Asplenium hookerianum result from independent dispersals from New Zealand." Australian Systematic Botany 23, no. 6 (2010): 387. http://dx.doi.org/10.1071/sb10028.

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The fern Asplenium hookerianum Colenso (Aspleniaceae) is indigenous to New Zealand and Australia. In New Zealand, it is widespread and genetically diverse, with 26 haplotypes previously identified for the chloroplast trnL–trnF locus. In Australia, A. hookerianum is currently known only from two small populations in Victoria and two in Tasmania. The present study assessed the diversity, relationships and biogeographic history of the Australian populations. A single trnL–trnF haplotype was identified in Tasmanian populations, and it was shared with populations in south-western New Zealand. The s

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21

Itzstein-Davey, Freea. "The representation of Proteaceae in modern pollen rain in species-rich vegetation communities in south-western Australia." Australian Journal of Botany 51, no. 2 (2003): 135. http://dx.doi.org/10.1071/bt02048.

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The Proteaceae family is a large Gondwanan plant family with a major centre of richness in south-western Australia. Modern pollen–vegetation relationships in the two areas of species richness in the northern and southern sandplains of south-western Australia were investigated to calibrate fossil-pollen studies concurrently conducted on Eocene, Pliocene and Quaternary sediment. Results indicated that the Proteaceae component in modern pollen rain can be quite high, contributing up to 50% of the count. Some sites showed a dominant type (such as Banksia–Dryandra), whilst others had up to six diff

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Bell, DT, S. Vlahos, and LE Watson. "Stimulation of Seed-Germination of Understorey Species of the Northern Jarrah Forest of Western-Australia." Australian Journal of Botany 35, no. 5 (1987): 593. http://dx.doi.org/10.1071/bt9870593.

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Glasshouse trials in trays of soil measured the germination response to high temperatures and the presence of charcoal in 40 non-leguminous understorey species of the northern jarrah (Eucalyptus marginata Donn ex Smith) forest. Species producing relatively low proportions of viable and germinable seeds tended to be the long-lived resprouting species where reproductive output may not be of major adaptive significance. Three species, Conostylis setosa, Trymalium ledifolium and T. spathulaturn, with seed stored in the soil, were stimulated to germinate by high temperatures. Bradysporous, obligate

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23

Bolland, M. D. A., and R. J. Gilkes. "The systematic effect of soil P buffer capacity on Colwell soil P test v. plant response calibration exists only when field experiments are adjacent." Soil Research 42, no. 7 (2004): 763. http://dx.doi.org/10.1071/sr04022.

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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) values. These calibration data were fitted to a linear equation, and the slope values for the 13 sites were compared with the P buffer capacity (PBC) of the soils. There was no systematic relationship between these variables except for 3 adjacent sites at Badgingarra and for 3 adjacent sites at Newdegate. We conclude that differences in climate and site conditions have a greater e

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Garkaklis, Mark J., J. S. Bradley, and R. D. Wooller. "The relationship between animal foraging and nutrient patchiness in south-west Australian woodland soils." Soil Research 41, no. 4 (2003): 665. http://dx.doi.org/10.1071/sr02109.

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The woylie (Bettongia penicillata) was once common and abundant over the southern third of the Australian continent. Since European settlement the range of this rat-kangaroo has become reduced by more than 97%, and until the early 1990s, only 3 small natural populations remained, all in south-western Australia. These medium-sized (c. 1 kg) marsupials create a large number of diggings as they forage for the hypogeous fruiting bodies of ectomycorrhizal fungi upon which they feed. The effect of such foraging activity on the availability of plant nutrients in the vicinity of such diggings was eval

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Snowball, R., and AD Robson. "Relationship Between Soil Properties and the Growth of Legumes on Acid Wodjil Soils in Western Australia." Australian Journal of Botany 33, no. 3 (1985): 299. http://dx.doi.org/10.1071/bt9850299.

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The relationship between vegetation and soil properties in part of the eastern wheatbelt of Western Australia was investigated. Soil in the Burracoppin Reserve supporting wodjil vegetation (Acacia beauverdiana, A. signata and Allocasuarina corniculata) had a very low pH in the 4.3-5.0 cm surface soil layer, a very low level of mineralizable N and a low chloride content compared to soils supporting Eucalyptus spp. All soils were low in exchangeable potassium and bicarbonate-extractable phosphorus. Acacia signata and Trifolium subterraneum were grown on a soil from Merredin supporting wodjil veg

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Gerritse, RG. "Effect of reaction-rate on leaching of phosphate through sandy soils of Western-Australia." Soil Research 33, no. 1 (1995): 211. http://dx.doi.org/10.1071/sr9950211.

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The effect of reaction rate on the mobility of phosphate in soils was measured from breakthrough curves in the leachate from small columns of soil, following step increases in the input concentration of phosphate. Average mobilities of phosphate in columns of soil, following a step increase in the input concentration, decrease with decreasing rate of flow and with increasing distance travelled and appear to be linearly correlated on a log-log scale with both flow rate and distance travelled. An empirical equation, describing these relationships, fits data from leaching experiments at flow rate

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Bolland, M. D. A., and D. P. Windsor. "Converting reactive iron, reactive aluminium, and phosphorus retention index (PRI) to the phosphorus buffering index (PBI) for sandy soils of south-western Australia." Soil Research 45, no. 4 (2007): 262. http://dx.doi.org/10.1071/sr07026.

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The recently developed phosphorus (P) buffering index (PBI) is now the national single-point P sorption index to rank the capacity of soil to sorb P. However, before PBI was developed, P sorption was routinely measured by 2 simple procedures in Western Australia: (i) since the mid 1970s, reactive iron (Fe), which is the concentration of Fe extracted from soil by ammonium oxalate; and (ii) since the mid 1980s, the P retention index (PRI), a single-point P sorption index. Both reactive Fe and aluminium (Al) extracted from soil by ammonium oxalalate (reactive Al) have been measured in experiments

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Bolland, MDA. "Residual value for wheat of phosphorus from calciphos, Duchess rock phosphate and triple superphosphate on a lateritic soil in south-western Australia." Australian Journal of Experimental Agriculture 25, no. 1 (1985): 198. http://dx.doi.org/10.1071/ea9850198.

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The residual values of phosphorus from triple superphosphate and from three rock phosphates were compared in a 4-year field experiment with wheat, grown on a phosphorus deficient lateritic soil in south-western Australia. The three rock phosphate fertilizers were an apatitic rock phosphate originating from the Duchess deposit in north-western Queensland, and calcined (500�C) Christmas Island C-grade ore as a powder and as pellets. Five rates of each fertilizer were applied at the commencement of the experiment and their effectiveness was calculated from data on yield of dried plant tops, grain

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29

McLaughlin, M. J., N. A. Maier, R. L.Correll, M. K. Smart, L. A. Sparrow, and A. McKay. "Prediction of cadmium concentrations in potato tubers (Solanum tuberosum L.) by pre-plant soil and irrigation water analyses." Soil Research 37, no. 1 (1999): 191. http://dx.doi.org/10.1071/s98031.

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Potato tubers can accumulate high concentrations of cadmium (Cd) in edible portions, so that techniques to determine high risk Cd environments are required by growers. The use of combined soil and irrigation water analyses prior to crop planting was investigated as a means to predict risks of Cd accumulation in tubers. Soils and irrigation waters were analysed at 134 sites in the major potato production areas in Western Australia, South Australia, Tasmania, Victoria, and New South Wales. Irrigation waters were analysed for electrical conductivity (EC), major cations, and anions. Cadmium was ex

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Hall, D. J. M., R. A. Sudmeyer, C. K. McLernon, and R. J. Short. "Characterisation of a windbreak system on the south coast of Western Australia. 3. Soil water and hydrology." Australian Journal of Experimental Agriculture 42, no. 6 (2002): 729. http://dx.doi.org/10.1071/ea02009.

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This paper describes changes in soil water and ground water at various distances from a Pinus pinaster windbreak in south-western Australia. Soil water contents were measured by neutron moisture meter and time domain reflectometry at distances from a windbreak ranging from 1 to 20 tree heights (H). Within 3 H of the windbreak, soil water storage was reduced by 100–153 mm/1.8 m when compared to unsheltered conditions (20 H) over the 4 years of the experiment. Beyond 3 H, no significant differences in soil water storage were found which could be related to microclimate modification. Relationship

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Powell, Jocelyn M., David A. Morrison, Paul A. Gadek, Darren M. Crayn, and Christopher J. Quinn. "Relationships and Generic Concepts within Styphelieae (Epacridaceae)." Australian Systematic Botany 10, no. 1 (1997): 15. http://dx.doi.org/10.1071/sb95044.

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A morphological data base of 30 characters has been assembled for 33 terminal taxa in the tribe Styphelieae sensu Powell et al. (1996), as well as four outgroup taxa representing the other major affinity groups previously identified within the Epacridaceae on morphological and molecular data. Heuristic and bootstrap analyses provided strong support for the tribe, but indicated a need to modify several long-established generic concepts. Four genera are shown here to be polyphyletic. Six new monotypic genera should be segregated from Astroloma. Brachyloma should be divided into three segregates.

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Bolland, MDA. "Residual value of phosphorus from superphosphate for wheat grown on soils of contrasting texture near Esperance, Western Australia." Australian Journal of Experimental Agriculture 26, no. 2 (1986): 209. http://dx.doi.org/10.1071/ea9860209.

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The residual value for wheat of phosphorus (P) from superphosphate was measured in field experiments on two texture-contrast (duplex) soils near Esperance, Western Australia. Superphosphate was applied to previously untreated plots once only, in 1980, 198 1, 1982 or 1983. The residual value of this P was measured in 1983 relative to P applied in 1983. Results were similar for both soils. Superphosphate applied in previous years did not produce the same yield as superphosphate applied in the current year. As calculated from yield response, relative effectiveness was 65, 42 or 32% after 1, 2 and

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Baek, C. W., and N. Coles. "The influence of antecedent soil moisture conditions on the rainfall–runoff threshold value of a roaded catchment used for water harvesting." Water Supply 13, no. 5 (September 1, 2013): 1202–8. http://dx.doi.org/10.2166/ws.2013.128.

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A roaded catchment (RC) is a representative type of artificial catchment for rainwater harvesting. The rainfall–runoff threshold value of the RC is the main factor which influences the system efficiency and cost. Antecedent soil moisture condition is an important factor which impacts on the determination of the rainfall–runoff threshold value. In this study, rainfall–antecedent soil moisture condition–runoff relationships and the potential efficiency of RCs are presented. Rainfall and runoff data monitored at research sites in Merredin and Mount Barker are used to determine this relationship.

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Wakelin-King, Gresley. "Using geomorphology to assess contour furrowing in western New South Wales, Australia." Rangeland Journal 33, no. 2 (2011): 153. http://dx.doi.org/10.1071/rj10080.

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This study examines landscape rehabilitation treatments installed 20–40 years ago in the Western Catchment of NSW. Treatment outcomes were assessed using geomorphic criteria, because geomorphic processes are fundamental to ecological permanence. Contour furrowing creates artificial runoff-runon sets which intercept runoff (resistance to flow by windrows microrelief and surface roughness) and promote infiltration (artificial permeability by ripping). As originally conceived, after windrows subside, flow resistance would be afforded by surface roughness under belts of vegetation. This study show

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Mendham, D. S., A. M. O'Connell, and T. S. Grove. "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." Soil Research 40, no. 5 (2002): 859. http://dx.doi.org/10.1071/sr01092.

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The influence of land-use management on Walkley-Black soil carbon (C) concentration, 3 concentrations of permanganate oxidisable C (33, 167, and 333 mm), microbial biomass, and soil respiration in a laboratory incubation was tested in surface soil from 10 sites in south-western Australia. The sites ranged in total C concentration from 1.9 to 8.3%, and represented a broad climatic and soil-type distribution across south-western Australia. At each of the sites, 0-10 cm soil was collected from plots in pasture (20-71 years old), Eucalyptus globulus plantation (7-10 years old, established on ex-pa

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Bolland, M. D. A., W. J. Cox, and B. J. Codling. "Soil and tissue tests to predict pasture yield responses to applications of potassium fertiliser in high-rainfall areas of south-western Australia." Australian Journal of Experimental Agriculture 42, no. 2 (2002): 149. http://dx.doi.org/10.1071/ea01060.

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Dairy and beef pastures in the high (>800 mm annual average) rainfall areas of south-western Australia, based on subterranean clover (Trifolium subterraneum) and annual ryegrass (Lolium rigidum), grow on acidic to neutral deep (>40 cm) sands, up to 40 cm sand over loam or clay, or where loam or clay occur at the surface. Potassium deficiency is common, particularly for the sandy soils, requiring regular applications of fertiliser potassium for profitable pasture production. A large study was undertaken to assess 6 soil-test procedures, and tissue testing of dried herbage, as predictors o

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Samadi, Abbas, and R. J. Gilkes. "Forms of phosphorus in virgin and fertilised calcareous soils of Western Australia." Soil Research 36, no. 4 (1998): 585. http://dx.doi.org/10.1071/s97060.

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Total phosphorus (P), inorganic P (Pi), organic P, and several Pi fractions were determined for 8 fertilised calcareous soils under agriculture and their virgin analogues under natural bush to ascertain changes due to agricultural development. The relationships between soil properties and forms of P were also determined. In general, agricultural development of soils resulted in increases in total P (average 105% increase), Pi (154%), organic P (49%), Olsen P (200%), Colwell P (100%), and all Pi fractions compared with their virgin analogues. For the virgin soils, the abundance of the Pi fracti

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Franklin, Donald C., and Richard A. Noske. "Nectar sources used by birds in monsoonal north-western Australia: a regional survey." Australian Journal of Botany 48, no. 4 (2000): 461. http://dx.doi.org/10.1071/bt98089.

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We document the flora that provides nectar for birds in monsoonal north-western Australia, and examine the relationship between floral morphology and bird morphology in the region. Twenty-four regular nectarivores (21 honeyeaters, two lorikeets, one white-eye) and 29 opportunist species have been observed probing the flowers of 116 species of plants from 28 families. Amongst the nectar sources, the Myrtaceae is dominant in both the number of species and frequency of use, followed distantly by the Proteaceae and Loranthaceae. Variation between bird species in patterns of use of different floral

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Kaur, Parwinder, Krishnapillai Sivasithamparam, and Martin J. Barbetti. "Host Range and Phylogenetic Relationships of Albugo candida from Cruciferous Hosts in Western Australia, with Special Reference to Brassica juncea." Plant Disease 95, no. 6 (June 2011): 712–18. http://dx.doi.org/10.1094/pdis-10-10-0765.

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White rust, caused by Albugo candida, is a serious pathogen of Brassica juncea (Indian mustard) worldwide and poses a potential hazard to the presently developing canola-quality B. juncea industry in Australia. Nine isolates of A. candida, representing strains collected from B. juncea, B. rapa, B. oleracea, B. tournefortii, Raphanus raphanistrum, R. sativa, Eruca vesicaria subsp. sativa, Capsella bursa-pastoris and Sisymbrium irio, from different locations in Western Australia (W.A.), were tested on cruciferous host differentials to characterize their pathogenicity. In particular, these studie

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Anderson, Geoffrey C., Ken I. Peverill, and Ross F. Brennan. "Soil sulfur—crop response calibration relationships and criteria for field crops grown in Australia." Crop and Pasture Science 64, no. 5 (2013): 523. http://dx.doi.org/10.1071/cp13244.

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Accurate definition of the sulfur (S) soil test–crop grain yield increase (response) relationship is required before soil S test measurements can be used to if there are likely to be responses to S fertilisers. An analysis was done using the Better Fertiliser Decision for Crops (BFDC) National Database using a web application (BFDC Interrogator) to develop calibration relationships between soil S tests (KCl-40 and MCP) using a selection of sampling depths and grain relative yields (RY). Critical soil test values (CSTV) and critical soil test ranges (CSTR) were defined at RY 90%. The ability of

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Towers, Isaac R., and John M. Dwyer. "Regional climate and local-scale biotic acceptance explain native–exotic richness relationships in Australian annual plant communities." Proceedings of the Royal Society B: Biological Sciences 285, no. 1886 (September 5, 2018): 20181328. http://dx.doi.org/10.1098/rspb.2018.1328.

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Native and exotic species richness is expected to be negatively related at small spatial scales where individuals interact, and positive at larger spatial scales as a greater variety of habitats are sampled. However, a range of native–exotic richness relationships (NERRs) have been reported, including positive at small scales and negative at larger scales. We present a hierarchical metacommunity framework to explain how contrasting NERRs may emerge across scales and study systems, and then apply this framework to NERRs in an invaded winter annual plant system in southwest Western Australia. We

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Graham, J. F., B. R. Cullen, G. M. Lodge, M. H. Andrew, B. P. Christy, P. J. Holst, X. Wang, S. R. Murphy, and A. N. Thompson. "SGS Animal Production Theme: effect of grazing system on animal productivity and sustainability across southern Australia." Australian Journal of Experimental Agriculture 43, no. 8 (2003): 977. http://dx.doi.org/10.1071/ea02197.

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The effects of various grazing management systems on sown, naturalised, and native pastures were studied at 6 different locations in the temperate high rainfall zone (HRZ, >600 mm rainfall/year) of southern Australia, as part of the Sustainable Grazing Systems (SGS) Program. The treatments examined had different pasture species and fertiliser management, with grazing method ranging from set stocking (continuous grazing) to rotation with rests based on pre- and post-grazing herbage mass or season and plant phenology. Sites were located at: Albany, Western Australia; Manilla, Barraba, Nundle,

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Brennan, Ross F., and Michael J. Bell. "Soil potassium—crop response calibration relationships and criteria for field crops grown in Australia." Crop and Pasture Science 64, no. 5 (2013): 514. http://dx.doi.org/10.1071/cp13006.

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The Better Fertiliser Decision for Crops (BFDC) National Database holds historic data for 356 potassium (K) fertiliser rate experiments (431 treatment series) for different rain-fed grain crops and soil types across Australia. Bicarbonate-extractable K (Colwell soil-test K) is the most extensively used soil test reported in the database. Data are available for several crop species grown on a range of soil types from all states except Tasmania. Species represented and number of treatment series in the database are: wheat (Triticum aestivum L.), 254; barley (Hordeum vulgare L.), 5; canola (Brass

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Regan, K. L., K. H. M. Siddique, and L. D. Martin. "Response of kabuli chickpea (Cicer arietinum L.) to sowing rate in Mediterranean-type environments of south-western Australia." Australian Journal of Experimental Agriculture 43, no. 1 (2003): 87. http://dx.doi.org/10.1071/ea01200.

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The effect of sowing rate (60–320 kg/ha) on the growth and seed yield of kabuli chickpea (cv. Kaniva) was assessed at 11 sites for 4 seasons in the cropping regions of south-western Australia. The economic optimum plant density and yield potential were estimated using an asymptotic model fitted to the data and calculating the sowing rate above which the cost of additional seed was equivalent to the revenue that could be achieved from the extra seed yield produced, assuming a 10 and 50% opportunity cost. On average for all sites and seasons, plant densities ranged from 10 plants/m2 when sown at

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Bolland, MDA. "Efficiency with which yellow serradella and subterranean clover use superphosphate on a deep sandy soil near Esperance, Western Australia." Australian Journal of Experimental Agriculture 26, no. 6 (1986): 675. http://dx.doi.org/10.1071/ea9860675.

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In 1984, the efficiency with which an early- and a late-flowering yellow serradella (cv. Pitman and strain DP4 respectively) and a subterranean clover (cv. Seaton Park) utilise phosphorus (P) from superphosphate was compared on a deep sandy soil near Esperance, W.A. Phosphorus applications ranged from 0 to 90 kg/ha P. For each legume there was an approximately linear relationship between the amount of P applied and either the yield of dry herbage and seed, or the P content of dry herbage. The efficiency with which each legume utilised applied P (kg/ha) was determined by calculating the slope o

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Butcher, Ryonen. "New taxa of 'leafless' Tetratheca (Elaeocarpaceae, formerly Tremandraceae) from Western Australia." Australian Systematic Botany 20, no. 2 (2007): 139. http://dx.doi.org/10.1071/sb06015.

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The relationships among rare ‘leafless’ species of Tetratheca Sm. occurring on banded ironstone ranges near Koolyanobbing, Western Australia, and allied, unclassified, populations from Eneabba, Newdegate and the Die Hardy Range have been assessed by molecular characters. These findings, in conjunction with morphological investigations, have identified a new species and two new subspecies from within the ‘T. aphylla group’ and these are formally described here. Tetratheca nephelioides R.Butcher, is geographically restricted to the Eneabba area and has close morphological affinity to T. aphylla

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Braaten, Christine C., P. Brandon Matheny, Debra L. Viess, Michael G. Wood, Joseph H. Williams, and Neale L. Bougher. "Two new species of Inocybe from Australia and North America that include novel secotioid forms." Botany 92, no. 1 (January 2014): 9–22. http://dx.doi.org/10.1139/cjb-2013-0195.

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The secotioid form of fruit bodies of mushroom-forming fungi may be an intermediate evolutionary modification of epigeous agaricoid or pileate–stipitate forms (i.e., with pileus, spore-bearing tissues, and stipe) and typically hypogeous, gasteroid- or truffle-forming species, in which the fruit bodies have been reduced to enclosed structures containing modified spore-producing tissues. To date, only a single secotioid species (Auritella geoaustralis Matheny & Bougher ex Matheny & Bougher) has been described in the ectomycorrhizal family Inocybaceae, a hyperdiverse clade of ca. 500–700

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McDougall, K. L., R. J. Hobbs, and G. E. St J. Hardy. "Distribution of understorey species in forest affected by Phytophthora cinnamomi in south-western Western Australia." Australian Journal of Botany 53, no. 8 (2005): 813. http://dx.doi.org/10.1071/bt04203.

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The introduced soil-borne pathogen Phytophthora cinnamomi Rands infects and kills a large number of species in the jarrah (Eucalyptus marginata Donn. ex Smith) forest of Western Australia, causing great floristic and structural change. Many of the floristic changes can be explained simply by the known susceptibility of species to infection. Some common species, however, are rarely found at infested sites but are thought to be resistant to infection. It has been postulated that such species may be affected by the change in habitat caused by the death of trees, and not by P. cinnamomi directly.

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El-Tarabily, A., Giles E. St J. Hardy, and Krishnapillai Sivasithamparam. "Effects of Host Age on Development of Cavity Spot Disease of Carrots Caused by Pythium coloratum in Western Australia Khaled." Australian Journal of Botany 45, no. 4 (1997): 727. http://dx.doi.org/10.1071/bt96045.

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Three experiments were conducted with Pythium coloratum Vaartaja, a causal agent of cavity spot disease of carrots in Western Australia, to study the relationships between host age, time of infection and development of cavity spot lesions. Pythium coloratum was isolated frequently from 3-6-week-old asymptomatic roots of carrots grown in soils infested naturally or artificially with the pathogen. Carrots grown in containers of soil artificially infested with P. coloratum, but not those in naturally infested field soil, developed cavity spot lesions after 6 weeks. Early infection of carrot seedl

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McPharlin, IR, RC Jeffery, and DH Pitman. "Phosphorus requirements of winter-planted lettuce (Lactuca sativa L.) on a Karrakatta sand and the residual value of phosphate as determined by soil test." Australian Journal of Experimental Agriculture 36, no. 7 (1996): 897. http://dx.doi.org/10.1071/ea9960897.

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The phosphorus (P) requirements of crisphead lettuce (Lactuca sativa L. cv. Oxley) was measured over 2 consecutive winter plantings using superphosphate that was freshly applied and applied 9 months before planting, at 0-600 kg/ha on a newly cleared Karrakatta sand of low natural P fertility. There was a significant (P<0.001) head yield response to level of applied P in both years. Phosphorus uptake by whole plants and plant shoots was related to level of applied P in Mitscherlich relationships (R2 = 0.88). Phosphorus recovery efficiency (fertiliser P uptake by shoots/P applied, both in kg/

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