The effects of rice growing on soil phosphorus immobilization

1978 ◽  
Vol 18 (91) ◽  
pp. 270 ◽  
Author(s):  
IR Willett ◽  
WA Muirhead ◽  
ML Higgins
Keyword(s):  
Iron Oxides ◽  
New South ◽  
Soil Phosphorus ◽  
Ammonium Oxalate ◽  
Rice Soils ◽  
P Sorption ◽  
South Wales ◽  
Before And After ◽  
Extractable Iron ◽  
Sorption Characteristics

Representative rice soils of the Murrumbidgee and Coleambally Irrigation Areas, New South Wales, were analysed for phosphate (P) sorption characteristics and active iron. Samples analysed were taken before and after flooding (in the field and glasshouse) and from rice bays, irrigation control banks and nearby, non-irrigated fencelines. Previously flooded soils showed greater P sorption capacities than their non-flooded soil counterparts. It was indicated that soils that had previously grown rice required more P for upland cropping than non-rice soils. P sorption was significantly positively correlated with active (acid ammonium oxalate extractable) iron. It was proposed that prolonged waterlogging mobilized iron from relatively well ordered iron oxides of low P sorption capacity but on oxidation formed disordered iron oxides with a large capacity to immobilize P.

A survey of a low-density koala population in a major reserve system, near Sydney, New South Wales..

2001 ◽  
Vol 23 (2) ◽  
pp. 135 ◽  
Author(s):  
A Curtin ◽  
D Lunney ◽  
A Matthews
Keyword(s):  
National Park ◽  
Field Survey ◽  
New South ◽  
Specific Information ◽  
Vegetation Types ◽  
Field Surveys ◽  
South Wales ◽  
Before And After ◽  
Recreation Area ◽  
Reserve System

cinereus) in Yengo National Park and Parr State Recreation Area, which together form a major reserve system where P. cinereus were known to be scarce. The first, a community survey which was distributed to 823 residences adjoining the reserves, yielded 139 responses. Of these, 31 responses provided information that allowed 26 P. cinereus locality records to be verified. A further eight P. cinereus locality records were obtained from interviews with neighbours. Most records were road-based. The second, a field survey based on scat searches, produced an additional 13 P. cinereus localities. P. cinereus scats were found under 11 tree species. Eucalyptus punctata was most frequently recorded with scats of those that were adequately sampled. A range of vegetation types and both ridges and gullies were used by P. cinereus. During field surveys, P. cinereus was found to be sparse and occurring throughout much of the survey area, concentrated in the eastern, southern and central parts of the reserve system. Both methods identified P. cinereus to be present before and after the extensive fires of January 1994, which burnt 60 % of the area. An appraisal of the methods revealed that they are complementary. The survey of residents provided recent and historical information and an indication of initial search areas for P. cinereus. The field survey yielded specific information about local P. cinereus habitat. The combination increased the number of P. cinereus records for the area more than four-fold. This study has provided the reserve managers with a clearer picture of the location of the local P. cinereus population.

Establishing surface-sown pastures in a Poa labillardieri-Themeda australis association

1986 ◽  
Vol 26 (3) ◽  
pp. 331 ◽  
Author(s):  
MH Campbell ◽  
MJ Keys ◽  
RD Murison ◽  
JJ Dellow
Keyword(s):  
Festuca Arundinacea ◽  
New South ◽  
New South Wales ◽  
Ground Cover ◽  
Cost Effective ◽  
Phalaris Aquatica ◽  
South Wales ◽  
Before And After

The effects of time and rate of application of glyphosate, 2,2-DPA and tetrapion on Poa labillardieri and Themeda australis were measured in seven experiments carried out 55 km south of Braidwood, on the southern tablelands of New South Wales between 1980 and 1982. In an eighth experiment (1981) and in a 35-ha demonstration (1983), at the same site, the effects of applying herbicides (before and after the autumn break) and surface-sowing Phalaris aquatica, Festuca arundinacea and Trifiolium repens with fertiliser on the control of P. labillardieri were ascertained. All three herbicides proved effective in reducing the ground cover of P. labillardieri from applications at any time of the year. For T. australis, tetrapion proved effective when applied at any time of the year, while glyphosate and 2,2-DPA were effective in all seasons except winter. Glyphosate at rates between 0.72 and 1.44 kg/ha a.i. was more cost effective than 2,2-DPA (11.1 kg/ha a.i.) and tetrapion (3.75 kg/ha a.i.). Best establishment and development of sown grasses and legumes was attained by applying herbicides after the autumn break but before heavy frosts, and then surface-sowing 1-3 months later. Control of P. labillardieri was best where P. aquatica and F. arundinacea established most densely.

Effects of variable-intensity logging and the influence of habitat variables on the distribution of the Greater Glider Petauroides volans in montane forest, southeastern New South Wales

2000 ◽  
Vol 6 (1) ◽  
pp. 18 ◽  
Author(s):  
Rodney P. Kavanagh ◽  
Rodney P. Kavanagh
Keyword(s):  
New South ◽  
New South Wales ◽  
Basal Area ◽  
Environmental Variable ◽  
Variable Intensity ◽  
Usual Practice ◽  
South Wales ◽  
Arboreal Marsupials ◽  
Significant Difference ◽  
Before And After

Populations of arboreal marsupials were assessed in forests before and after logging at different levels of logging intensity to determine the sensitivity of these species to habitat disturbance. The logging treatments imposed were unlogged controls and two intensities of integrated logging for sawlogs and woodchips. The mean basal area of trees retained in logged blocks ranged from 83% to 35% of pre-logging levels. The objective of the study was to develop better methods for managing arboreal marsupials within the wood production forests of southeastern New South Wales. Seven species of arboreal marsupials were recorded during the study, but the Greater Glider Petauroides volans was the only species recorded in sufficient numbers for analysis (86% of all records). No significant differences were observed between the treatments in counts of the Greater Glider before and after logging. However, given the observed trend and an a priori expectation of a decline in numbers of this species following intensive logging, a one-tailed statistical test was applied which resulted in a significant difference at P = 0.08 for the contrast between the unlogged controls and the most intensively logged treatment. The existence of a threshold in logging intensity within the range of 21 % to 39% retention of tree basal area, below which numbers of the Greater Glider suffer a marked decline, was inferred on the basis of comparisons with the results of other studies. Factors other than logging were important in determining the distribution of the Greater Glider. Elevation, in particular, was a significant environmental variable, with Greater Gliders more likely to occur in forests above 845 m a.s.1. The presence and absence of particular tree species also influenced the distribution of the Greater Glider. Forests containing Manna Gum E. viminalis and Mountain Gum E. dalrympleana were highly preferred compared to forests with a high proportion of E. obliqua. The presence of E. cypellocarpa appeared to improve the quality of habitat for the Greater Glider in forests dominated by E. obliqua. This study has shown that Greater Glider populations can be maintained at or near pre-logging levels when at least 40% of the original tree basal area is retained thoughout logged areas and when the usual practice of retaining unlogged forest in riparian strips is applied.

The Reliability and Validity of the Health of the Nation Outcome Scales: Validation in Relation to Patient Derived Measures

2000 ◽  
Vol 34 (3) ◽  
pp. 504-511 ◽  
Author(s):  
Robert Brooks
Keyword(s):  
Mental Health ◽  
Psychometric Properties ◽  
Interrater Reliability ◽  
New South ◽  
Short Form ◽  
Reliability And Validity ◽  
The Third ◽  
South Wales ◽  
Sf 36 ◽  
Before And After

Objective: The Health of Nation Outcome Scales (HoNOS) was developed to assess mental health outcomes. The aim of the studies is to examine the psychometric properties, reliability and validity of the HoNOS. Method: Three studies were conducted within St John of God Hospitals in New South Wales, Australia. They examined the reliability and the validity of the HoNOS. The first study examined the interrater reliability of the HoNOS, before and after staff training in the use of the HoNOS. The second study examined the validity of the HoNOS with the Symptom Checklist 90 Revised (SCL90-R) and the third study examined the validity of the HoNOS with the Short-Form 36 (SF-36). Results: The first study showed an improvement in the interrater reliability (IRR) of the HoNOS due to training. However, a generally unsatisfactory IRR (range 0.50–0.65) was achieved. The second study found no correlation between the SCL90-R and the HoNOS on admission (r = 0.04) and discharge (r = 0.06). The third study found no significant correlation between the Mental Component Score of the SF-36 and the HoNOS on admission (r = −0.033) nor on discharge (r = −0.104). Conclusions: The HoNOS has at best moderate interrater reliabilities. Further, the validity of the HoNOS is under question, that is, it does not correlate with a major measure of mental health symptoms, nor with a major measure of health status. As such, it is concluded that the psychometric properties of the HoNOS do not warrant its use as a routine measure.

The plant nutrient status of granite soils from the Bendemeer area of New South Wales

1966 ◽  
Vol 6 (20) ◽  
pp. 17 ◽  
Author(s):  
F McMullen
Keyword(s):  
Dry Matter ◽  
New South ◽  
Soil Phosphorus ◽  
New South Wales ◽  
Trifolium Subterraneum ◽  
Nutrient Status ◽  
Calcium Sulphate ◽  
Plant Nutrient ◽  
First Order ◽  
South Wales

A factorial glasshouse pot trial was used to examine the supply of phosphorus, boron, zinc, copper, cobalt, magnesium, molybdenum, potassium, and manganese, to the Dwalganup strain of Trifolium subterraneum L. growing in virgin granite soils from Bendemeer, New South Wales. Calcium sulphate was applied as a basal nutrient. Significant dry matter responses were obtained on all four virgin soils to the application of phosphorus, molybdenum, and potassium; to copper on two soils; and to boron and cobalt on one soil. Phosphorus was so deficient that responses to other plant nutrients did not occur in its absence. On all soils, significant first order interactions were recorded between phosphorus and other deficient elements. In addition, significant interactions were recorded between molybdenum and magnesium, copper and molybdenum, boron and molybdenum, copper and cobalt, and potassium and molybdenum.

Effects of topdressed superphosphate on the sheep and pasture production of dryland lucerne in central western New South Wales

1975 ◽  
Vol 15 (75) ◽  
pp. 475 ◽  
Author(s):  
H Brownlee ◽  
BJ Scott ◽  
RD Kearins ◽  
J Bradley
Keyword(s):  
New South ◽  
Soil Phosphorus ◽  
New South Wales ◽  
Stocking Rate ◽  
Gross Margin ◽  
Pasture Production ◽  
Wool Production ◽  
South Wales ◽  
Dry Conditions ◽  
Soil Phosphorus Test

Merino ewes at 3.7, 4.9 and 6.2 ha-1 grazed dryland lucerne (Medicago sativa cv. Hunter River) topdressed annually with superphosphate at 0, 125 and 251 kg ha-1, from September 1969 until December 1972, in an experiment at Condobolin, New South Wales. Superphosphate increased ewe liveweights, total forage available and phosphorus content of the forage by a small amount but did not increase wool production per head. The Bray soil phosphorus test in the top 8 cm of the soil profile rose from 8 p.p.m. to 48 p.p.m., but most of the phosphorus was concentrated in the 0-4 cm layer, where we consider that dry conditions reduced its availability to the lucerne. As stocking rate increased, ewe liveweights and wool production per head decreased and the sheep required more handfeeding for survival. The treatment with the greatest gross margin was the lowest stocking rate with nil fertilizer.

Diet of a native carnivore, the spotted-tailed quoll (Dasyurus maculatus), before and after an intense wildfire

2007 ◽  
Vol 34 (5) ◽  
pp. 342 ◽  
Author(s):  
James P. Dawson ◽  
Andrew W. Claridge ◽  
Barbara Triggs ◽  
David J. Paull
Keyword(s):  
Prey Availability ◽  
New South ◽  
Short Term ◽  
Survey Techniques ◽  
South Wales ◽  
Before And After ◽  
One Year ◽  
The Relationship ◽  
Prey Items ◽  
Broad Scale

The relationship between the diet of the spotted-tailed quoll (Dasyurus maculatus) and the abundance of its prey was investigated in rain-shadow woodland habitat in southern New South Wales for one year before and two years after a high-intensity, broad-scale wildfire. Scats were variously collected from quoll latrines and live-trapped animals during winter for each of the three years and analysed to determine prey items. Estimates of abundance of key ground-dwelling and arboreal medium-sized mammals were simultaneously obtained using plot-based survey techniques and spotlighting. Over the duration of the study, quoll diet was dominated by medium-sized mammals, particularly brushtail possums (Trichosurus spp.) and lagomorphs (rabbit and hare), followed by small and large-sized mammals. After the fire there was a shift in utilisation of food resources in response to significant changes in prey availability. Monitoring revealed that brushtail possums, lagomorphs and bandicoots were all significantly less abundant in the winter following the fire, and populations of lagomorphs, but not possums, then increased in the second winter after the fire. Quolls adapted to this by taking significantly more lagomorphs in each of the two years after the fire and by taking advantage of a short-term increase in the availability of carrion. The results of this study reaffirm that the spotted-tailed quoll is adaptable in its utilisation of available food, and that fires are not necessarily detrimental to the species and its prey base.

Understanding the Behaviour of Children in Care before and after Parental Contact

2017 ◽  
Vol 42 (1) ◽  
pp. 5-8 ◽  
Author(s):  
Frank Ainsworth ◽  
Patricia Hansen
Keyword(s):  
Child Protection ◽  
Foster Parents ◽  
New South ◽  
Frame Of Reference ◽  
Limited Time ◽  
South Wales ◽  
Before And After ◽  
Realistic Possibility ◽  
Children In Care ◽  
Parent Contact

It is not uncommon to hear foster carers and child protection case workers comment about a child's behaviour both before and after parental contact. Frequently these comments are negative, the view being expressed that contact should be reduced because the children get upset at seeing their parents for a limited time, and then at having to separate from them. The child's resultant distress seems too difficult to manage for foster carers. Some foster parents even go so far as to suggest that parental contact should completely cease. This article sets out the rationale for parent–child contact after a Children's Court has ruled that there is “no realistic possibility of restoration” of a child to parental care. In doing so, the article revisits many of the old arguments put forward for reducing parent contact. However, alternative ways of approaching children's difficult behaviours both pre- and post-contact are also proposed to suggest different ways of managing these behaviours. The legislation and child protection practice in New South Wales provides the frame of reference for this article.

Comparison of bicarbonate-extractable soil phosphorus measured by ICP-AES and colourimetry in soils of south-eastern New South Wales

Soil Research ◽  
2009 ◽  
Vol 47 (7) ◽  
pp. 742 ◽  
Author(s):  
M. R. Hart ◽  
P. S. Cornish
Keyword(s):  
Inductively Coupled Plasma ◽  
New South ◽  
Soil Phosphorus ◽  
New South Wales ◽  
Soil Samples ◽  
Available Phosphorus ◽  
Soil P ◽  
Inductively Coupled ◽  
South Wales ◽  
The Difference

Soil testing for plant-available phosphorus (P) in Australia is most commonly conducted using alkaline sodium bicarbonate extraction (Olsen or Colwell tests), followed by a colourimetric assay to measure the concentration of P in solution. Analysis by inductively coupled plasma (ICP) spectroscopy has become increasingly popular internationally for other soil P tests, especially Mehlich 3, due to its efficiency and ability to measure multiple elements in the one extract. The use of ICP in place of colourimetry has been used in some Australian laboratories for bicarbonate-extractable P. However, the method is known to measure forms of P (organic) that are not measured by the colourimetric assay. This study presents data comparing soil Colwell P measured by the 2 methods for 714 soil samples from pastoral sites in south-east New South Wales. Measurement by ICP consistently yielded significantly higher P concentrations than the colourimetric method (ICP-P = 1.122Col-P + 57.0, r2 = 0.95, P < 0.001). Differences between the 2 techniques were more marked in 0–20 mm than 0–100 mm depth soil samples, and in soils with greater clay contents, suggesting that the difference was related to soil organic matter, and thereby organic P contents. Relative differences were greatest in soils with lower P concentrations, i.e. within the agronomic optimum range of most interest to farmers. ICP analysis cannot be directly correlated with colourimetrically measured P in bicarbonate extracts, and would need to be developed and calibrated as a separate, new soil P test.

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