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.

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.

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.

Aspects of long-term use of herbicides: measurement of residues of diuron and simazine in an orchard soil

1972 ◽  
Vol 12 (58) ◽  
pp. 535 ◽  
Author(s):  
KH Bowmer
Keyword(s):  
New South ◽  
Apple Orchard ◽  
South Wales ◽  
Orchard Soil ◽  
Liquid Chromatographic Analysis ◽  
Flame Detector ◽  
One Year ◽  
Liquid Chromatographic ◽  
Annual Application

At Bathurst, New South Wales, an apple orchard was treated with diuron and simazine annually for six years. One year after the last application the distribution of herbicide residues in the soil was estimated using a biological method. For simazine the usefulness of the alkali flame detector in gas-liquid chromatographic analysis was also investigated ; convenience and sensitivity compared favourably with bioassay. Residues of diuron and simazine in the surface soil (0-5 cm) represented 36-46 and 2-3 per cent of the annual application respectively. Diuron occurred to a depth of 40 cm but simazine was confined to the surface 15 cm of soil. Diuron residues were greater than expected from reports in the literature and apple trees exposed to high levels were damaged severely ; however, at recommended levels symptoms were only mild. Simazine had no deleterious effect on the trees even after application for six years at three times recommended levels.

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.

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