The relationship of gully sidewall shape to sediment production

Soil Research ◽  
1987 ◽  
Vol 25 (4) ◽  
pp. 531 ◽  
Author(s):  
RJ Crouch

Reports of gully side erosion describe a range of side forms. The lack of information on the relative significance of the various forms in terms of sediment production hinders the identification of the major sediment sources within gullies. Observations of gully sides in a catchment in central New South Wales showed a range of side forms being eroded at significantly different rates. Side classification and measurement by survey and erosion pins showed that vertical sides, subject to undercutting, had the highest erosion rate (75 mm yr-l) followed by vertical fluted walls (37 mm yr-l). These different rates are critical in predicting present and future rates of erosion and identifying sediment sources within gully systems.

1988 ◽  
Vol 4 (14) ◽  
pp. 122-143 ◽  
Author(s):  
Jim Davis

In recent years, melodrama has increasingly been recognized not only as an important element in popular theatre studies, but for the intrinsic importance of the form itself. Less considered has been the relationship of the material of melodrama to the ‘real life’ it reflected in a highly conventionalized yet ultimately (for its audiences), recognizable fashion. Here, Jim Davis looks at one major category, nautical melodrama, setting the images of the navy and of sailors that it created alongside factual and critical accounts of life at sea in the first half of the nineteenth century. He conveys both the pressures that existed for redress of abuses, and the consequent balance between coercion and subversion in the melodramas themselves – drawing in particular on the memoirs of Douglas Jerrold to explore aspects of the ambiguity to be found in contemporary attitudes. Jim Davis, who is the author of several books and articles in the area of nineteenth century theatre history, is presently teaching in the School of Theatre Studies at the University of New South Wales.


1966 ◽  
Vol 14 (2) ◽  
pp. 195 ◽  
Author(s):  
J Walker

The new genus Polythrinciopsis, with the type species P. phragmitis, is described from a leaf spot of Phragmites communis Trin, in eastern New South Wales. The genus is characterized by hypophyllous conidiophores, which develop in clusters from a few fungal cells in the stomatal opening and which show a strongly unilateral placement of spore scars; by large, hyaline to very pale olivaceous, two-celled, acrogenous conidia; and by an abundant superficial mycelium developing on the under side of the leaf spots. The relationship of this fungus to some other genera of the Fungi Imperfecti is discussed.


1985 ◽  
Vol 7 (2) ◽  
pp. 103
Author(s):  
GJ Tupper ◽  
WJ Muller

The effects of mechanical removal of shrub tops and grazing on two bluebush communities, one with Maireana pyramidata (black bluebush)and the other with M. pyramidata and M. sedifolia (pearl bluebush) as co-dominants, were examined on the western edge of the Riverine Plain in New South Wales Measurements were made on shrub regeneration, the relationship of shrub units to a critical value for an erosion index, the change in soil surface levels, and the growth of herbaceous plants over time Shrub regeneration was slower under grazed than ungrazed conditions and occurred mainly from basal shoots of established plants rather than from seedling establishment. Herbage yields Increased on the mounds previously occupied by shrubs, whereas production between shrubs was not affected by shrub removal. After four years there was sufficient shrub growth to prevent wind erosion, except on the cleared and grazed plot at the M. sedifolia site.


2022 ◽  
Vol 00 (00) ◽  
pp. 1-18
Author(s):  
Elizabeth Jane Stephens ◽  
Rosanna Natoli

In a time of enormous change in the Australian news media industry – with outlet closures, redesign of company business models, rationalization of staff and shifts in medium uptake – this article explores journalists’ exposure to and perceptions of work pressures in their jobs. It explores the relationship of these experiences with the journalists’ job satisfaction. The study reports that journalists find the industry difficult and demanding, with time pressures, ethical compromise and overwork being their main concerns. However, the study also found that journalists still derive satisfaction from a profession they perceive as meaningful through informing their communities about matters that affect their decision making and how they live. This passion for community service alongside the notion of holding authority to account result in a sense of overarching job satisfaction. This article presents part of a study that investigated the experience of journalists in remote and regional media organizations in Queensland and New South Wales through survey and interviews.


1998 ◽  
Vol 38 (6) ◽  
pp. 567 ◽  
Author(s):  
G. C. Anderson ◽  
R. D. B. Lefroy ◽  
G. J. Blair

Summary. A glasshouse experiment was conducted to study the correlation between various soil sulfur (S) extractants and pasture response to applied S grown under controlled environmental conditions (glasshouse) as influenced by variations in levels of extractable S. Intact paired soil cores were collected at 2-month intervals from an S x P factorial experiment at 4 field sites on the Northern Tablelands of New South Wales on 11 occasions. Soil samples were collected from each core and the cores placed in the glasshouse. Sulfur was applied to one core of each pair and basal nutrients applied to all cores which were then oversown with white clover (Trifolium repens L. cv. Haifa). The extractable S in the soil was analysed using the following techniques: 0.1 mol Ca(H2PO4)2/L (MCPt); 0.1 mol Ca(H2PO4)2/L, treated with activated charcoal (MCPi); water (H2O); 0.25 mol KCl/L, heated at 40°C for 3 h (KCl-40); 0.25 mol KCl/L, heated at 100°C for 4 h (KCl-100); 0.5 mol NaHCO3/L (NaHCO3); and an acid digestion of the soil (total). Dry matter yield and S content of the pasture shoots were measured for each 2-month growth period. The relationship between the various soil S extraction techniques and the response of pasture to applied S varied over time and was influenced by the level of inorganic S present in the soil and the amount of organic S extracted. When the level of MCPi-extractable S ranged between 2 and 22 µg S/g soil due to the application of fertiliser (summer 1987–88 and autumn 1988), or after a period of high mineralisation rates (spring 1988), the MCPi, MCPt, H2O and KCl-40 techniques had the highest correlation with the increase in S content of the pasture when S was applied. The higher correlation for the MCPt, H2O and KCl-40 techniques than the MCPi technique indicates that plants obtained some S from the organic S pool. In contrast, when the levels of MCPi-extractable S ranged between 2 and 10 µg S/g soil and the rate of mineralisation increased in response to an increase in soil temperature (June 1988 and June 1989) or moisture (September 1989) upon transfer of samples from the field to the glasshouse, the MCPt, H2O and KCl-40 techniques underestimated the available S pool and had lower r2 values than either the KCl-100 or NaHCO3 techniques.


1970 ◽  
Vol 107 (2) ◽  
pp. 133-145 ◽  
Author(s):  
David Roberts ◽  
Janet Springer ◽  
Fr. Chr. Wolff

SummaryA résumé of the stratigraphy, sedimentation and volcanism of the Lower Palaeozoic rocks in the northern Trondheim region is presented. Spatially the Caledonian rocks occupy a shallow trough which plunges south-west. Within the trough the rocks have been subject to four episodes of deformation; the essential structure of the region is an anticline flanked by recumbent fold nappes (F1) which spill outwards on either side of the NE-trending spine. These are deformed by further major folds (F2). The F3 folds, developed widely but only on a mesoscopic scale, show a constant down-dip sense of overturning. It is thought that they were formed in response to gravitational sliding. F4 is represented only by local kink bands. It is probable that large areas of these Cambro-Silurian rocks are allochthonous, the marginal thrust being of late-F2 age. Examination of the structures is illuminating many other aspects of the geology of this segment of the Caledonian chain, making it possible to visualize the changing sequences of deformation, the relationship of metamorphism to tectonic level and the tectonic behaviour of domal granitic masses. In conclusion, comments are made on the relative significance of the orogenic ‘disturbances’ described from this part of Norway.


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