Bunch covers, leaf number and yield of bananas

1970 ◽  
Vol 10 (47) ◽  
pp. 802 ◽  
Author(s):  
DW Turner

The effects of plastic bunch covers and varying defoliation treatments on bunch weight were measured on Williams bananas at Alstonville in north-eastern New South Wales. Bunch covers did not significantly affect bunch weight. The number of leaves left on the plant at bunch emergence only reduced yield when less than four leaves were present. Leaf length duration was calculated and was positively related to bunch weight. Bunch covers did not alter the relationship between leaf number and yield. The rate of sucker growth and water relations within the plants were altered by defoliation treatments. Both of these effects were greatest when less than three leaves were left on the plant.


2000 ◽  
Vol 40 (3) ◽  
pp. 357 ◽  
Author(s):  
S. A. Spence ◽  
S. A. Spence ◽  
A. C. Woodhead ◽  
A. C. Woodhead

The weight of 2659 Friesian heifers was measured electronically on 41 farms in north-eastern New South Wales during autumn 1992. The 41 producers involved were surveyed on their heifer management practices. The relationship between liveweight and age was determined from these measurements. This provided a base line against which improvement in heifer weight for age could be measured subsequent to a planned extension program. In 1992, 2 management practices were found to be associated with significantly higher weights for age. These were feeding more than 1 kg of concentrate to heifers prior to weaning and grazing heifers on fertilised pasture between weaning and 12 months of age. An extension program promoting improved heifer management was conducted, using adult learning principles, from 1992 until 1995. Nineteen of the 41 farms were revisited in winter 1997 when the heifers were again measured and management practices surveyed. Heifer weight for age had increased by a small but significant amount between 1992 and 1997. Management changes which occurred between 1992 and 1997 were: increased vaccination rates; decreased use of antibiotic injections for treating calf illnesses; increase in feeding over 1 kg of concentrate per day to preweaned heifers; and increased use of silage to feed weaned heifers. There was also a decreased percentage of producers who considered calf diseases to be a problem. Between 1992 and 1995, 14 farmers began monitoring their heifers regularly, either by measuring weight electronically or by using a weigh tape.



2002 ◽  
Vol 106 (1) ◽  
pp. 57-69 ◽  
Author(s):  
R.L Pressey ◽  
G.L Whish ◽  
T.W Barrett ◽  
M.E Watts


2010 ◽  
Vol 2 (5) ◽  
pp. 1378-1399 ◽  
Author(s):  
Clement E. Akumu ◽  
Sumith Pathirana ◽  
Serwan Baban ◽  
Daniel Bucher


2002 ◽  
Vol 29 (3) ◽  
pp. 313 ◽  
Author(s):  
P. C. Catling ◽  
R. J. Burt ◽  
R. I. Forrester

Statistical models are presented of the distribution and abundance of ground-dwelling mammals in eucalypt forests in relation to environmental variables within an area of approximately 24 000 km2 in north-eastern New South Wales. Environmental variables are defined as climatic or topographic variables that may be useful to map the distribution of fauna. The environmental variables examined were season, temperature, rainfall, elevation, lithology, steepness of slope, position on slope, aspect and landform profile. The probability of recording some species was higher in spring than autumn and many species were in highest abundance in areas of low temperature (high elevation). Although aspect was a significant variable in a number of models, no species was absent from any aspect category. Mid-slopes down to and including creeks and drainage lines were particularly important for many species, as were areas with flatter terrain. Although we have modelled environmental variables only there will no doubt be longer-term interactions between habitat and environmental variables. Fundamentally, environmental variables will determine the type of habitat present at a site, and the distribution of canopy communities, at least, can be predicted from environmental variables. However, other studies have shown for ground-dwelling mammals that environmental variables contribute little and it is the state of the habitat locally, and particularly the understorey, that determines their presence and abundance at a site. The results are discussed in relation to similar models using habitat variables and in relation to the use of such models in the management of ground-dwelling fauna in forests.





Telopea ◽  
2007 ◽  
Vol 11 (4) ◽  
pp. 413-417
Author(s):  
John Williams ◽  
John Hunter


1982 ◽  
Vol 33 (1) ◽  
pp. 77 ◽  
Author(s):  
AH Arthington ◽  
JAL Watson

The Odonata and physicochemical properties of freshwater streams, lakes, ponds and bogs in the sand-dune systems of Fraser, Moreton and North Stradbroke Islands and Cooloola, Queensland: and Wooli, New South Wales, are described. The odonate faunas of these dune masses show some differences from those of nearby areas, and there are close associations between some species and particular types of dune fresh water. Although no physicochemical characteristics were identified that might limit these dune dragonflies to their specific habitats, the lake-dwellers in particular may be useful indicators of environmental change.



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