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| Vosough Ahmadi, Bouda; Morgan, Colin A.; Stott, Alistair W.. |
| Since decoupling of the CAP, many Scottish suckler cow farms are facing financial difficulties. In response, many farmers are out-wintering extensively managed suckler cows to minimise production costs. These systems are of animal welfare concern. A range of trade-offs between animal welfare indicators and between animal welfare and farm profitability can be identified. A Dynamic Programming (DP) model was developed to study these trade-offs. Two herds were modelled assuming their feeding regimes were either low (LHERD) or high (HHERD). The objective of the DP was to maximise the expected net margin from a current cow and its successors over an infinite time horizon. Preliminary results showed that the rate of voluntary culling was higher in HHERD than in... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Livestock Production/Industries; Beef cow; Economics; Dynamic programming; Animal welfare. |
| Ano: 2009 |
URL: http://purl.umn.edu/61122 |
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| Stott, Alistair W.; Vosough Ahmadi, Bouda; Morgan-Davies, Claire; Dwyer, Cathy M.; Goddard, Pete; Phillips, Kate; Milne, Catherine E.; Kupiec-Teahan, Beata; Ringrose, Sian; Waterhouse, Tony. |
| Data from each of 5 commercial, extensive sheep farms in Cumbria, UK were used as parameters in a linear program (LP) representing labour and grazing management in such farming systems. The LP maximised ewe enterprise gross margin subject to constraints dictated by the labour availability and land types on each farm. Under the assumptions used, labour availability and price restricted ewe numbers well below those observed in practice on 2 farms i.e. land resources were adequate for the farming system practiced. On two other farms stocking levels and hence returns were limited by the availability of forage and hence feed input prices relative to output. On one farm, greater grassland productivity was the key determinant of system performance. It was... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Livestock Production/Industries; Extensive; Sheep; Economics; LP. |
| Ano: 2009 |
URL: http://purl.umn.edu/61123 |
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| Vosough Ahmadi, Bouda; Dwyer, Cathy M.; Erhard, H.W.; Morgan-Davies, Claire; Waterhouse, A.; Milne, Catherine E.; Kupiec-Teahan, Beata; Ringrose, Sian; Goddard, Pete; Phillips, Kate; Stott, Alistair W.. |
| This study quantified interactions between animal welfare and farm profitability in British extensive sheep farming systems. Qualitative welfare assessment methodology was used to assess welfare from the animal's perspective in 20 commercial extensive sheep farms and to estimate labour demand for welfare, based on the assessed welfare scores using data collected from farm inventories. The estimated labour demand was then used as a coefficient in a linear program based model to establish the gross margin maximising farm management strategy for given farm situations, subject to constraints that reflected current resource limitations including labour supply. Regression analysis showed a significant relationship between the qualitative welfare assessment... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Sheep; Labour; Animal Welfare; Linear Programme; Livestock Production/Industries; C6; Q10; Q19; Q57. |
| Ano: 2010 |
URL: http://purl.umn.edu/91803 |
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| Stott, Alistair W.; Vosough Ahmadi, Bouda; Milne, Catherine E.; Morgan-Davies, Claire; Dwyer, Cathy M.; Kupiec-Teahan, Beata; Ringrose, Sian; Phillips, Kate; Waterhouse, A.. |
| A bio-economic linear program based on data from 20 commercial extensive sheep farms was used to predict the effects on aspects of farm management of response to CAP reform in Great Britain. The objective function of the LP was to maximise gross margin while meeting ewe energy requirements from farm grown or purchased feeds on a monthly basis throughout the farming year. Three farms were constrained by availability of home-grown grass and thus contracted under a subsidy free scenario. Just one farm justified expansion using extra labour purchased at £5/hour. The other farms remained at current flock sizes using existing unpaid labour. However, all farms adjusted their grazing regime according to the balance of land types available. These adjustments varied... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Productivity Analysis. |
| Ano: 2010 |
URL: http://purl.umn.edu/91826 |
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| Vosough Ahmadi, Bouda; Morgan, Colin A.; Stott, Alistair W.. |
| Since decoupling of the CAP, many Scottish suckler cow farms are facing financial difficulties. In response, many farmers are out-wintering extensively managed suckler cows to minimise production costs. These systems are of animal welfare concern. A range of trade-offs between animal welfare indicators and between animal welfare and farm profitability can be identified. A Dynamic Programming (DP) model was developed to study these trade-offs. Two herds were modelled assuming their feeding regimes were either low (LHERD) or high (HHERD). The objective of the DP was to maximise the expected net margin from a current cow and its successors over an infinite time horizon. Preliminary results showed that the rate of voluntary culling was higher in HHERD than in... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Beef cow; Economics; Dynamic programming; Animal welfare; Livestock Production/Industries. |
| Ano: 2009 |
URL: http://purl.umn.edu/51078 |
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