Oil concentration and composition of olives during fruit maturation in south-western New South Wales

2001 ◽  
Vol 41 (6) ◽  
pp. 815 ◽  
Author(s):  
J. Ayton ◽  
R. J. Mailer ◽  
K. Robards ◽  
B. Orchard ◽  
M. Vonarx
Keyword(s):  
Fatty Acid ◽  
Moisture Content ◽  
Fatty Acid Profile ◽  
Oil Content ◽  
New South ◽  
New South Wales ◽  
Dry Weight ◽  
Wagga Wagga ◽  
South Wales ◽  
Colour Development

This paper reports on an observational study of the oil and moisture content, and fatty acid profile, of olives (Olea europaea) for 15 tree groupings with groups consisting of trees with similar DNA patterns. Observations were taken at 2 sites (Wagga Wagga and Yanco) in south-western New South Wales, over 2 seasons. These sites represent the largest gene pool of developed olive trees in Australia. Differences in oil and moisture content were identified at both the Wagga Wagga and Yanco sites. At the former site, group 12 (˜cv. Tarascoa) had the highest oil content at full colour development in both 1998 and 1999 (50.1 and 45.5% dry weight, respectively) while at Yanco, group 15 (˜cv. Verdale) had the highest oil content in both years with 51.6 and 45.3%, respectively. The fatty acid profile was shown to be highly dependent upon tree group (i.e. cultivar), and with further study may be used as a method for discriminating among cultivars. The pattern of development of oil, moisture and fatty acids (palmitic, palmitoleic, stearic, oleic, linoleic and linolenic acids) is also detailed for 4 trees in the Wagga Wagga grove over the ripening season in 1998 and 1999. For these trees, oil content (dry weight basis) increased rapidly in the first 15 weeks (January–April) while moisture declined except for a small increase at around 10 weeks (mid-March). Fatty acid development showed similar trends between the trees over the length of the study.

Maturation of sunflower

1975 ◽  
Vol 15 (77) ◽  
pp. 833 ◽  
Author(s):  
WK Anderson
Keyword(s):  
Fatty Acids ◽  
Oleic Acid ◽  
Fatty Acid ◽  
Moisture Content ◽  
Oil Content ◽  
New South ◽  
Dry Weight ◽  
Physiological Maturity ◽  
Moisture Contents ◽  
South Wales

Maturation of sunflowers was recorded in two field sowings at Armidale, New South Wales. Measurements were made to define anthesis, the accumulation of dry weight, oil and fatty acids in the achenes and to determine moisture contents and crop appearance associated with achene maturation. It is suggested that anthesis may be described either as its mid-point, i.e. when 50% of capitula exhibit anthesis over half their area, or by its spread, i.e. the time between 50% of capitula commenced anthesis and 50 %completed anthesis. Maximum achene dry weight was reached in the field when the achene moisture content was about 40 and the capitulum moisture content was about 70%. Both achene oil content and the content of the major polyunsaturated fatty acid (linoleic) reached their maxima at about the same time as achene dry weight in the field and this point was thus defined as 'physiological' maturity for sunflowers. It corresponded to when about ten per cent of capitula had turned brown. Production of linoleic and oleic acid was found to predominate in the later stages of achene maturation in both field sowings.

Diet and growth of rainbow trout, Salmo gairdneri Richardson, in two streams on the New England Tableland, New South Wales

1981 ◽  
Vol 32 (6) ◽  
pp. 967 ◽  
Author(s):  
RWJ Pidgeon
Keyword(s):  
Rainbow Trout ◽  
New England ◽  
New South ◽  
New South Wales ◽  
Rank Correlation ◽  
Dry Weight ◽  
Fish Growth ◽  
Salmo Gairdneri ◽  
Fish Size ◽  
South Wales

The diets and growth rates of rainbow trout in the Wollomombi and Guy Fawkes Rivers in northern New South Wales were examined. The growth rate of trout in the Wollomombi River was much higher than that of fish in the Guy Fawkes River. Spearman rank correlation coefficients indicated that stream type was more important than fish size in determining the composition of the diet of the trout. Benthic invertebrates formed the largest component of the diet in both streams: 66.0 and 63.0% of ash-free dry weight (AFDW) in the Wollomombi River and the Guy Fawkes River, respectively. Trout in the Wollomombi River consumed more nektonic prey (33.3% of AFDW) than fish in the Guy Fawkes River (3.7% of AFDW). In contrast, surface food (aquatic imagines and terrestrial insects) made up a much higher proportion of the diet of trout in the Guy Fawkes River (33.9% of AFDW) than in the Wollomombi River (0.6% of AFDW). Crayfish were a major component of the diet (in terms of AFDW) in both streams, their proportions increasing with fish size. The significance of crayfish in relation to fish growth is discussed.

The availability of mineral nitrogen in a wheat soil from southern New South Wales

1962 ◽  
Vol 2 (6) ◽  
pp. 185 ◽  
Author(s):  
RR Storrier
Keyword(s):  
Nitrogen Uptake ◽  
New South ◽  
New South Wales ◽  
Nitrogen Deficiency ◽  
Ammonia Nitrogen ◽  
Mineral Nitrogen ◽  
Wheat Crop ◽  
Wagga Wagga ◽  
Emergence Period ◽  
South Wales

In a red-brown earth soil from Wagga Wagga the fluctuations in the level of mineral nitrogen (ammonia plus nitrate-nitrogen) and its availability to wheat under growing period rainfalls of 6 inches and 16 inches were studied. Ammonia-nitrogen did not exceed 8 lb nitrogen per acre 6 inches but showed statistically significant short term fluctuations. Mineral nitrogen decreased steadily from the 4-5 leaf stage of plant growth, reaching minimum values in the ear-emergence period when a temporary nitrogen deficiency occurred. Following rainfalls of about one inch or more, conditions favoured biological activity and nitrogen was mineralized, absorbed by the crop and/or leached down the profile. In one season a release of mineral nitrogen about two weeks before flowering contributed an estimated 20-30 per cent of the total nitrogen uptake of the crop. Nitrogen uptake by the wheat crop ceased after flowering and subsequent changes in mineral nitrogen level reflect the net result of mineralization and demineralization processes, and nitrogen uptake by weeds, particularly skeleton weed. Absorption of nitrogen from the profile depended upon seasonal conditions, with the surface 18 inches suppling the greater part of the nitrogen absorbed by the crop. This indicates the need to sample regularly to at least a depth of 18 inches, particularly during the period from 4-5 leaf to flowering, when studying the relation between mineral nitrogen and crop growth. The data suggest that the response of wheat, as measured by grain yield and protein content, to the higher levels of mineral nitrogen in the improved soils of southern New South Wales is determined by soil moisture levels, particularly in the post-flowering period.

The butterfly fauna of the Griffith district, a fragmented semi-arid landscape in inland southern New South Wales

2006 ◽  
Vol 12 (2) ◽  
pp. 140 ◽  
Author(s):  
Michael F. Braby ◽  
Ted D. Edwards
Keyword(s):  
Species Richness ◽  
Arid Zone ◽  
New South ◽  
New South Wales ◽  
Summer Rainfall ◽  
Wagga Wagga ◽  
Fragmented Landscape ◽  
South Wales ◽  
Butterfly Fauna ◽  
Semi Arid

Thirty-three species of butterflies are recorded from the Griffith district in the semi-arid zone of inland southern New South Wales. The butterfly community comprises the following structure: 19 species (58%) are resident; 7 (21 %) are regular immigrants; 2 (6%) are irregular immigrants; 5 (15%) are vagrants. Except for a few migratory species, most occur in relatively low abundance. Lack of similar studies elsewhere in western New South Wales precludes generalizations regarding the species richness, composition and structure of semi-arid butterfly communities. Comparison of the butterfly fauna with that from five other inland regions on the slopes and foothills of the Great Diving Range, revealed that the Griffith district is most similar in species richness and composition to that of Deniliquin and to a lesser extent Wagga Wagga and Cowra in the south, than with two regions in the higher summer rainfall area of the north of the State (Coonabarabran-Mendooran, Narrabri-Bellata). Overall, the butterfly fauna of inland New South Wales (total of 73 species, of which 49 occur in the southern regions) is depauperate compared with that recorded from the coastal/subcoastal areas east of the Great Dividing Range. Attention is drawn to the conservation significance of several vegetation types and habitat remnants in the Griffith district. Much of the native vegetation in the district has been extensively modified since European settlement due to excessive clearing for agriculture, resulting in a highly fragmented landscape for the conservation of native flora and fauna. With the exception of the lycaenid Candalides hyacinthinus Simplex, which is considered threatened locally, there is a general absence of narrow range endemic butterflies associated with mallee-heathland or mallee-woodland, possibly as a result of widespread land clearing practices of mallee vegetation in the past.

Spatial variation in soil organic carbon and nitrogen at two field sites under crop and pasture rotations in southern New South Wales, Australia

Soil Research ◽  
2018 ◽  
Vol 56 (8) ◽  
pp. 780 ◽  
Author(s):  
Mark Conyers ◽  
Beverley Orchard ◽  
Susan Orgill ◽  
Albert Oates ◽  
Graeme Poile ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Spatial Variation ◽  
New South ◽  
New South Wales ◽  
Wagga Wagga ◽  
Soil Cores ◽  
South Wales ◽  
Sampling Protocols ◽  
The Mean

Estimating the likely variance in soil organic carbon (OC) at the scale of farm fields or smaller monitoring areas is necessary for developing sampling protocols that allow temporal change to be detected. Given the relatively low anticipated soil OC sequestration rates (<0.5 Mg/ha.0.30 m/year) for dryland agriculture it is important that sampling strategies are designed to reduce any cumulative errors associated with measuring soil OC. The first purpose of this study was to evaluate the spatial variation in soil OC and nitrogen (N), in soil layers to 1.50 m depth at two monitoring sites (Wagga Wagga and Yerong Creek, 0.5 ha each) in southern New South Wales, Australia, where crop and pasture rotations are practiced. Four variogram models were tested (linear, spherical, Gaussian and exponential); however, no single model dominated across sites or depths for OC or N. At both sites, the range was smallest in surface soil, and on a scale suggesting that sowing rows (stubble) may dominate the pattern of spatial dependence, whereas the longer ranges appeared to be associated with horizon boundaries. The second purpose of the study was to obtain an estimate of the population mean with 1%, 5% and 10% levels of precision using the calculated variance. The number of soil cores required for a 1% precision in estimation of the mean soil OC or N was impractical at most depths (>500 per ha). About 30 soil cores per composite sample to 1.50 m depth, each core being at least 10 m apart, would ensure at least an average of 10% precision in the estimation of the mean soil OC at these two sites, which represent the agriculture of the region.

Palatability to sheep of the Eragrostis curvula complex. 3. A comparison of naturalised and selected taxa

1988 ◽  
Vol 28 (1) ◽  
pp. 53 ◽  
Author(s):  
WH Johnston
Keyword(s):  
New South ◽  
New South Wales ◽  
Wagga Wagga ◽  
Eragrostis Curvula ◽  
South Wales ◽  
Stocking Rates ◽  
Relative Palatability

The palatability of 20 accessions of E. curvula collected from naturalised populations in New South Wales was compared on 7 occasions with 2 selected accessions previously found to be highly palatable. The experiment was conducted at Wagga Wagga, N.S.W., between January 198 1 and July 1983. The relative palatability of most accessions was substantially similar from rating to rating, despite differences in the extent to which the trial was grazed. Palatability was related to the agronomic group to which the accessions belonged. For the naturalised taxa, Curvula was ranked equal to Tall Chloromelas. but both were more palatable than Short Chloromelas. The naturalised accessions were all less palatable than the selected accessions. It was concluded that the selected accessions were sufficiently palatable to be well utilised in pastures by stock grazing at commercial stocking rates.

Palatability to sheep of the Eragrostis curvula complex. 2. Selection of palatable taxa

1988 ◽  
Vol 28 (1) ◽  
pp. 47 ◽  
Author(s):  
WH Johnston
Keyword(s):  
Rating Scale ◽  
New South ◽  
New South Wales ◽  
Wagga Wagga ◽  
Visual Rating ◽  
Eragrostis Curvula ◽  
South Wales ◽  
Visual Rating Scale ◽  
Relative Palatability ◽  
Selection Of

Relative palatability of 12 previously selected taxa of Eragrostis curvula complex was assessed using a visual rating scale of 0 (not grazed) to 10 (completely grazed). Visual ratings were converted to ranks and the most and least palatable lines were compared over 19 grazing assessments in trials at Wagga Wagga, Temora and Orange, New South Wales. Three highly palatable and 2 acceptably palatable accessions were identified. The importance of palatability in the E. curvula complex is discussed.

Effects of raising the receival moisture content on the storability of Australian wheat

1993 ◽  
Vol 33 (7) ◽  
pp. 909 ◽  
Author(s):  
JM Desmarchelier ◽  
T Ghaly
Keyword(s):  
Moisture Content ◽  
New South ◽  
New South Wales ◽  
South Australia ◽  
Average Moisture Content ◽  
Bread Making ◽  
South Wales ◽  
Australian Wheat ◽  
Normal Standards

The receival moisture content of wheat was raised experimentally from 12 to 13% (w/w, wet basis) at sites near Cowra and Forbes (New South Wales) and Port Giles (South Australia) that were fitted with cooling (aeration), during the 1989-90 and 1990-91 seasons. At Cowra and Forbes, no wheat was received above 12% moisture content. At Port Giles, large quantities of wheat were received in the range 12.1-13.0% moisture content, reaching a maximum of 56% of receivals in 1 bin. However, the average moisture content in each bin did not exceed 12.0% and changed, on average, only 0.01% during aerated storage. No significant effect on quality was detected from studies on viability, bread-making quality, and mycotoxins. All wheat was successfully passed for export, meeting all normal standards including the 'nil tolerance' for live insects.

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