6 results on '"J. P. Trompf"'
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2. Decreasing the mob size but not stocking rate of ewes at lambing increases the survival of twin lambs born on farms across southern Australia
- Author
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Andrew Thompson, Serina Hancock, J. P. Trompf, G. A. Kearney, Lyndon J. Kubeil, Gordon Refshauge, and Amy Lockwood
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Stocking rate ,040301 veterinary sciences ,animal diseases ,Domestic sheep reproduction ,0402 animal and dairy science ,04 agricultural and veterinary sciences ,respiratory system ,Context data ,Biology ,040201 dairy & animal science ,Breed ,0403 veterinary science ,Animal science ,Stocking ,parasitic diseases ,Animal Science and Zoology ,Food Science - Abstract
Context Data collected from producers in south-eastern Australia found that the survival of twin-born lambs decreased by 3.5% for each extra 100 ewes in the mob at lambing. Increasing stocking rate by 1 ewe/ha decreased lamb survival by a further 0.7%. These survey findings suggest that lamb survival could be improved by optimising the allocation of ewes to mobs and paddocks at lambing. Aim The present paper reports two experiments. Experiment 1 tested the hypotheses that (1) the survival of twin-born lambs would be greater when ewes lamb in smaller mobs and at lower stocking rates, and (2) the effects of mob size and stocking rate would be greater in Merinos than in non-Merino breeds. Experiment 2 tested the hypothesis that the survival of twin-born Merino lambs would be greater at lower mob sizes when ewes lambed at stocking rates
- Published
- 2020
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3. Participation in Lifetime Ewe Management results in changes in stocking rate, ewe management and reproductive performance on commercial farms
- Author
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L. C. Kildey, D. J. Gordon, Ralph Behrendt, J. P. Trompf, M. Curnow, and Andrew Thompson
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business.industry ,media_common.quotation_subject ,Agricultural economics ,Stocking ,Blueprint ,Agriculture ,Facilitator ,Environmental management system ,Animal Science and Zoology ,Quality (business) ,Profitability index ,Program Design Language ,business ,Food Science ,media_common - Abstract
Lifetime Ewe Management is an extension program designed to assist sheep producers to improve their understanding of ewe nutrition and to develop the skills and confidence to improve their management. The course is based on a small-group extension model and was developed by the Lifetimewool project as a way to incorporate the research findings, economic modelling and producer guidelines developed by the project. Lifetime Ewe Management commenced in Victoria in the spring of 2006 and by the end of 2010, 221 producers had completed the 2-year program. The changes in knowledge, attitudes, skills, aspirations and management practices of 182 of these participants were examined. Participants of the Lifetime Ewe Management program increased their whole-farm stocking rates by 14%, increased lamb marking percentages by 11–13% depending on enterprise type, and decreased ewe mortality rates by 43%. These improvements resulted from a significant change in the perceived importance of managing ewes to condition-score targets to improve profitability and increases in the ability of participants to condition score ewes, assess pasture quantity and quality and feed budget. These changes were consistent regardless of how innovative the participants were at the beginning of the program. The appeal and success of the program was attributed largely to the small-group model where producers worked with their own flock under the guidance of a skilled facilitator and with access to effective decision-making tools. The Lifetime Ewe Management program design provides a blueprint for future extension programs striving to achieve widespread practice change.
- Published
- 2011
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4. Differences in management practices and attitudes between the Triple P Program entrants and other pastoral producers in the region
- Author
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Peter Sale and J. P. Trompf
- Subjects
Research program ,education.field_of_study ,Ecology ,business.industry ,Population ,Agricultural science ,Stocking ,Turnover ,Agriculture ,Sustainability ,General Agricultural and Biological Sciences ,business ,education ,Hectare ,Stock (geology) - Abstract
A survey of the pasture productivity settings, practices and attitudes was undertaken for 229 pastoral producers who volunteered to enter the Triple P Program in 1997, and for 89 pastoral producers from 2 representative districts of Victoria. The latter group of producers was considered to be representative of the general population of pastoral producers in the regions where the Triple P Program was undertaken. Comparison of the survey results reveals that the volunteer participants entering the paired-paddock extension program employed different management practices and had different attitudes to productivity issues compared with the general pastoral producers. Before entering the program the Triple P volunteers were already employing more productive practices such as soil testing, measuring pasture availability and spring lambing. In addition the volunteers had higher whole-farm stocking rates and fertiliser use than the general pastoral producers. The different management practices employed by the 2 groups were consistent with their contrasting attitudes towards managing their farms. The Triple P volunteers were focussed on improving production per hectare through increased stocking rates, which could be achieved by additional expenditure on fertiliser and pasture renovation. The general pastoral producers were more focussed on improving production per head which was achieved by gauging animal performance, maintaining stock in good condition and maintaining expenditure on animal health. We contend that the differences identified between the producers volunteering to participate in the Triple P Program and the general pastoral producers are a direct consequence of the voluntary approach used to recruit Triple P participants. This approach attracts a select group of farmers who are inclined to engage in extension and training activities and tend to have different attitudes and practices to the general pastoral producer. A more proactive approach to recruitment will be required if a larger proportion of the general producer population is to engage in the paired-paddock extension program.
- Published
- 2001
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5. The paired-paddock model as an agent for change on grazing properties across south-east Australia
- Author
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Peter Sale and J. P. Trompf
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geography ,geography.geographical_feature_category ,Agroforestry ,business.industry ,Pasture ,Gross margin ,Agricultural science ,Stocking ,Agriculture ,Grazing ,Environmental management system ,Livestock ,General Agricultural and Biological Sciences ,business ,Hectare - Abstract
A detailed study was undertaken on the pasture management practices of 146 producers across south-east Australia who participated in the Grassland’s Productivity Program (GPP) for 3 years between 1993 and 1997. The GPP was an extension program to assist wool producers to develop skills and gain confidence in their ability to manage more productive pastures on their farms. The program consisted of 50 farmer groups (200 farmers participating) spread across the 4 states of South Australia, southern New South Wales, Victoria and Tasmania. Each farmer established paired-paddocks on their own property to compare productive pastures with existing pastures. Productive pastures involve increased rates of fertiliser on pastures containing productive species, with stocking rate adjusted to consume available pasture. After 3 years of involvement in the GPP, there was a whole-farm increase in P fertiliser use by 6.3 kg P/ha, stocking rates by 2.6 dse/ha and annual pasture resowing by 0.9% of the farm, when averaged across the 146 participants. The participants were applying the productive pasture technology to almost a third of their properties in 1997 and the intention was to increase this to over half of their properties by 2000. The participants also changed farm management practices as the program effectively developed management skills. There were increases in the ability to assess pasture quality and quantity, livestock by weighing or physical assessment, and the ability to calculate per hectare production and per hectare gross margins. A high proportion of GPP participants were soil testing (0.92) and spring lambing (0.72) at the completion of the program. The results indicated that the adoption of productive pastures was generally consistent across south-east Australia for pastoral producers who participated in this program, although south-west Victorian and south-east South Australian GPP participants did increase whole-farm P application by more than GPP participants from outside that region. The widespread change in farming practice was attributed to the additive and interactive effect of the paired-paddock comparison, the guidance provided by the facilitator, the group interaction and the skills training. Each of these components of the paired-paddock model combined to form an effective agent for change to increase pasture productivity on these grazing properties.
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- 2000
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6. Changes in practices and decisions resulting from the paired-paddock model used in the Grassland’s Productivity Program
- Author
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B. Graetz, Peter Sale, J. Shovelton, J. P. Trompf, and G. R. Saul
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geography.geographical_feature_category ,business.industry ,Pasture ,Agricultural science ,Geography ,Stocking ,Environmental protection ,Agriculture ,Environmental management system ,Cultural practice ,Livestock ,Soil fertility ,General Agricultural and Biological Sciences ,business ,Productivity - Abstract
Summary. A detailed survey was undertaken in the spring of 1995 with 20 wool producers in south-west Victoria and the south-east of South Australia to determine the impact of their participation for 18 months in a program called the Grassland’s Productivity Program. This program involved groups of producers establishing paired-paddock comparisons on their own farms with guidance from an experienced facilitator. Productive pasture practices (increased fertiliser rates, responsive pasture species and high stocking rates) were used in one paddock, while the remaining paddock was managed with existing practices. A second group of 15 producers from the same districts who did not participate in the Grassland’s Productivity Program were selected at random and also surveyed. Although the 2 groups of producers had similar pasture productivity parameters (phosphorus fertiliser, stocking rates and pasture resowing rates) in the autumn of 1993, the Grassland’s Productivity Program participants had significantly (P
- Published
- 1998
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