Variation in non-wool components of the greasy fleece over the body of Merino sheep

1984 ◽  
Vol 24 (124) ◽  
pp. 62 ◽  
Author(s):  
KJ Thornberry ◽  
KD Atkins
Keyword(s):  
Agricultural Research ◽  
New South ◽  
Correlation Coefficients ◽  
Matter Content ◽  
The Body ◽  
Research Centre ◽  
Merino Wool ◽  
South Wales ◽  
Sampling Position ◽  
One Year

Twelve one-year-old ewes were randomly selected from each of four flocks running together at pasture at the Agricultural Research Centre, Trangie, New South Wales. The flocks represented fine wool, medium wool non-Peppin and medium wool Peppin strains of Merino. Wool samples were collected from nine sites over the body of each ewe. Gradients over the fleece in percentage suint, percentage wax, wax:suint ratio, percentage dust, percentage vegetable matter and estimated clean scoured yield were demonstrated. Although flocks differed in the average level of these components, gradients were similar for the different flocks. The mid-side appeared to be a satisfactory sampling position for estimating the suint, wax, wax:suint ratio, dust and yield characteristics of the whole fleece. The mid-side values for these characteristics were similar to the average values for all nine sites and the correlation coefficients between mid-side values and the total of all sites for percentage suint, percentage wax, wax:suint ratio, percentage dust and estimated yield were 0.94, 0. 8.9, 0.90 and 0.87 respectively. These were higher than for any other single sampling position. The correlation between mid-side and the overall value for vegetable fault was only 0.56 and neither the mid-side nor any other single site appeared to be sufficiently reliable to predict total vegetable matter content.

Response of Inga rice to nitrogen fertilizer rate and timing in New South Wales

1982 ◽  
Vol 22 (115) ◽  
pp. 62 ◽  
Author(s):  
DP Heenan ◽  
LG Lewin
Keyword(s):  
Nitrogen Fertilizer ◽  
Agricultural Research ◽  
New South ◽  
New South Wales ◽  
Research Centre ◽  
Yield Response ◽  
Fertilizer Rate ◽  
South Wales ◽  
Panicle Number ◽  
Nitrogen Fertilizer Rate

Two experiments were done at the Yanco Agricultural Research Centre, New South Wales, in 1978-79 and 1979-80 to measure the response of long grain rice, cv. Inga, to rates of nitrogen applied at two different times. The highest yields were recorded when the nitrogen was applied at panicle initiation. Increasing the rate from 100 to 200 kg N/ha at panicle initiation had no effect on grain yield. When the nitrogen was applied earlier, just before permanent water, yields were highest at 50 kg N/ha and declined at the highest rates (150 and 200 kg N/ha). This negative yield response was mainly due to a drop in the percentage of filled florets, and occurred despite an increase in panicle number.

Influence of nectar volume and sugar content on seed set in lucerne

1992 ◽  
Vol 32 (6) ◽  
pp. 713 ◽  
Author(s):  
RH Holtkamp ◽  
KJ Morthorpe ◽  
AD Clift
Keyword(s):  
Seed Set ◽  
Agricultural Research ◽  
New South ◽  
Sucrose Concentration ◽  
Sugar Content ◽  
Research Centre ◽  
Nectar Volume ◽  
South Wales ◽  
Liquid Chromatographic Analysis ◽  
Liquid Chromatographic

Twenty-four cultivars of lucerne, representing the genetic variation currently grown in Australia, were grown with flood irrigation at the Agricultural Research Centre, Trangie, New South Wales. Soil type was a red-brown earth Dr 2.23. Plants were sampled during peak flowering to determine nectar volume per 100 florets. Seed set was determined by hand collection and threshing of 100 racemes of mature pods per cultivar. Glucose, fructose and sucrose concentrations in the nectar were measured using high pressure liquid chromatographic analysis. NO other sugars were found in the nectar. Seed set was found to be correlated (r = 0.74, P<0.01) with both nectar volume and sucrose concentration.

Growth, grain yield and water use of rice grown under restricted water supply in New South Wales

1984 ◽  
Vol 24 (124) ◽  
pp. 104 ◽  
Author(s):  
DP Heenan ◽  
JA Thompson
Keyword(s):  
Grain Yield ◽  
Water Use ◽  
Agricultural Research ◽  
New South ◽  
New South Wales ◽  
Research Centre ◽  
Total Water ◽  
Leaf Stage ◽  
South Wales ◽  
Matter Production

Growth, grain yield and water use by Calrose rice grown under three flood irrigation regimes and four nitrogen fertilizer treatments were examined at Yanco Agricultural Research Centre, New South Wales, to determine the response of rice under a restricted supply of water. Growth under weekly irrigations before panicle initiation severely restricted dry matter production. When nitrogen (90 kg N/ha) was split with 45 kg N/ha at the three-leaf stage and 45 kg N/ha at panicle initiation followed by permanent flood at panicle initiation, yield was 8.67 t/ha. This was equivalent to yields obtained from conventional practice where all fertilizer was applied at the three-leaf stage followed immediately by permanent flood. Delaying permanent flood until panicle initiation resulted in approximately 23% saving in total water use. Weekly irrigation throughout the season produced low vegetative growth and grain yields.

Trangie wallaby grass [Austrodanthonia caespitosa (Gaudich.) H.P. Linder]

2008 ◽  
Vol 48 (4) ◽  
pp. 575 ◽  
Author(s):  
C. Waters ◽  
B. Dear ◽  
B. Hackney ◽  
P. Jessop ◽  
G. Melville
Keyword(s):  
Agricultural Research ◽  
New South ◽  
Dactylis Glomerata ◽  
Research Centre ◽  
Close Relative ◽  
Summer Drought ◽  
Native Grass ◽  
South Wales ◽  
Eastern Australia ◽  
Seed Increase

Trangie wallaby grass, Austrodanthonia caespitosa (Dc1), is a composite of wild ecotypes collected from western New South Wales. A. caespitosa is a widespread native grass adapted to a broad range of environmental conditions but is particularly suited to low rainfall (300–450 mm) areas of south-eastern Australia. In this region, this cultivar has a demonstrated superior persistence to its close relative A. richardsonii (Cashmore) H.P. Linder cv. Taranna and the widely used pasture species, phalaris (Phalaris aquatica cv. Sirolan) and cocksfoot (Dactylis glomerata cv. Currie). This superior persistence was apparent in its ability to recruit new seedlings, even under summer drought conditions. Trangie wallaby grass was maintained under seed increase for 5 years at Trangie Agricultural Research Centre and subsequently at Dareton Agricultural and Advisory Station for 3 years.

Overwintering of Tranzchelia discolor in prune orchards in New South Wales

1987 ◽  
Vol 38 (5) ◽  
pp. 895 ◽  
Author(s):  
PJ Ellison ◽  
L McFadyen ◽  
PF Kable
Keyword(s):  
Leaf Litter ◽  
New South ◽  
New South Wales ◽  
Cross Infection ◽  
Infected Leaf ◽  
South Wales ◽  
One Year ◽  
Tranzschelia Discolor ◽  
Better Than

There are several ways in which Tranzschelia discolor may overwinter in prune orchards in the Murrumbidgee Irrigation Areas of New South Wales. The aecial state, cross-infection from peach and almond, twig cankers, and urediniospores on living leaves persisting through winter were considered, but were thought to be unlikely. The ability of urediniospores to survive on infected leaf litter, either on the ground under trees or lodged within the framework of trees, was studied over two winters. Urediniospore viability declined with time, but in both seasons a proportion were capable of germination in the spring. Spores exposed within the tree framework survived better than those exposed on the ground, with about 20% and less than 5% respectively remaining viable by spring. In both winters spores from litter which overwintered within the framework of the tree were able to infect prune leaves in the spring. The infectivity of spores exposed on the ground was tested in the spring of one year and infections resulted on inoculated plants. The implications of these findings for the control of the rust in prunes are discussed.

Contributions to the Biology of Mulga. II. Germination

1971 ◽  
Vol 19 (1) ◽  
pp. 39 ◽  
Author(s):  
PB Preece
Keyword(s):  
Arid Zone ◽  
New South ◽  
Germination Rate ◽  
Ambient Air ◽  
Laboratory Studies ◽  
South Wales ◽  
Carbon Dioxide Concentrations ◽  
Germination Behaviour ◽  
One Year ◽  
Acacia Aneura

Investigations into the germination behaviour of seed of the widespread Australian arid zone leguminous tree Acacia aneura Benth. are described. Hardseededness has been overcome in routine laboratory studies, but attempts to understand the mechanism by which it is overcome in nature were unsuccessful. The seed germinates equally well in the dark and in the light within the temperature range 15-36°C. Temperatures between 20 and 30° are optimal for germination, and carbon dioxide concentrations up to 5 % increase the germination rate above that displayed in ambient air. A simple model has been developed which suggests that seed of this species should have been available and should have germinated in c. one year in every nine, since records began in parts of western New South Wales where mulga regeneration is absent.

The association between face cover and the productivity of Merino ewes in twelve NSW flocks

1967 ◽  
Vol 7 (28) ◽  
pp. 412
Author(s):  
JP Drinan ◽  
RB Dun
Keyword(s):  
Reproductive Performance ◽  
New South ◽  
New South Wales ◽  
Negative Association ◽  
The Body ◽  
Positive Correlation ◽  
South Wales ◽  
Body Weights ◽  
The Face ◽  
Fleece Weight

The association between the face cover and productivity of more than 3000 Merino ewes has been examined in 12 flocks located in the major sheep producing areas of New South Wales. Each flock was divided into Open (scores 1 and 2), Moderate (scores 3 and 4), and Muffled (scores 5 and 6) groups. A significant negative association between face cover and reproductive performance was apparent in two flocks that contained appreciable numbers of muffled-faced ewes. A similar trend was apparent in another Muffled flock, but in one other Muffled flock and four Open flocks, there was no evidence of such an association. The results from the remaining four flocks were not considered, due to the possibility that the results were confounded by face cover scoring after joining. In one Muffled flock, the body weights of weaner lambs were negatively correlated with their dams' face cover. A relationship between face cover score and total greasy fleece weight, corrected for previous reproductive performance, was absent from most flocks and negative in two, despite evidence of a positive correlation with belly weight. There was a trend to inferior fleeces of finer trade count in Moderate and Muffled groups of several flocks. Excess face cover was found to be an undesirable attribute in Merino flocks. Its importance was greatest in flocks containing appreciable numbers of muffled-faced ewes

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