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Volume 150 - February 2012

Contents

Page 4 of 4

Front Cover (OFC, IFC) and matter

  • AGS volume 150 issue 3 Cover and Front matter

  • Published online by Cambridge University Press:
    19 April 2012, pp. f1-f2
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  • AGS volume 150 issue 4 Cover and Front matter

  • Published online by Cambridge University Press:
    15 June 2012, pp. f1-f2
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Forthcoming Events

  • Forthcoming Events

  • Published online by Cambridge University Press:
    05 November 2012, pp. 787-788
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Book Review

Forthcoming Events

Modelling Animal Systems

  • Stochastic simulation of the cost of home-produced feeds for ruminant livestock systems

  • E. FINNERAN, P. CROSSON, P. O'KIELY, L. SHALLOO, D. FORRISTAL, M. WALLACE
  • Published online by Cambridge University Press:
    22 July 2011, pp. 123-139
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  • An agro-economic simulation model was developed to facilitate comparison of the impact of management, market and biological factors on the cost of providing ruminant livestock with feed grown on the farm (home produced feed). Unpredictable year-to-year variation in crop yields and input prices were identified as quantifiable measures of risk affecting feed cost. Stochastic analysis was used to study the impact of yield and input price risk on the variability of feed cost for eight feeds grown in Ireland over a 10-year period. Intensively grazed perennial ryegrass was found to be the lowest cost feed in the current analysis (mean cost €74/1000 Unité Fourragère Viande (UFV)). Yield risk was identified as the greatest single factor affecting feed cost variability. At mean prices and yields, purchased rolled barley was found to be 3% less costly than home-produced spring-sown barley. However, home-produced spring barley was marginally less risky than purchased barley (coefficient of variation (CV) 0·063 v. 0·064). Feed crops incurring the greatest proportion of fixed costs and area-dependent variable costs, including bunker grass silage, were the most sensitive to yield fluctuations. The most energy input-intensive feed crops, such as grass silage, both baled and bunker ensiled, were deemed most susceptible to input price fluctuations. Maize silage was the most risky feed crop (CV 0·195), with potential to be both the cheapest and the most expensive conserved feed.

Front Cover (OFC, IFC) and matter

  • AGS volume 150 issue 6 Cover and Front matter

  • Published online by Cambridge University Press:
    05 November 2012, pp. f1-f2
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Book Review

Back Cover (IBC, OBC) and matter

  • AGS volume 150 issue 3 Cover and Back matter

  • Published online by Cambridge University Press:
    19 April 2012, pp. b1-b8
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Front Cover (OFC, IFC) and matter

  • AGS volume 150 issue 5 Cover and Front matter

  • Published online by Cambridge University Press:
    23 August 2012, pp. f1-f2
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Back Cover (IBC, OBC) and matter

  • AGS volume 150 issue 4 Cover and Back matter

  • Published online by Cambridge University Press:
    15 June 2012, pp. b1-b4
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Forthcoming Events

  • Forthcoming Events

  • Published online by Cambridge University Press:
    08 February 2012, pp. 287-288
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Back Cover (IBC, OBC) and matter

  • AGS volume 150 issue 5 Cover and Back matter

  • Published online by Cambridge University Press:
    23 August 2012, pp. b1-b2
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  • AGS volume 150 issue 6 Cover and Back matter

  • Published online by Cambridge University Press:
    05 November 2012, pp. b1-b6
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Forthcoming Events

  • Forthcoming Events

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    20 December 2011, p. 143
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Front Cover (OFC, IFC) and matter

  • AGS volume 150 issue 2 Cover and Front matter

  • Published online by Cambridge University Press:
    08 February 2012, pp. f1-f2
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  • AGS volume 150 issue 1 Cover and Front matter

  • Published online by Cambridge University Press:
    20 December 2011, pp. f1-f2
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Back Cover (IBC, OBC) and matter

  • AGS volume 150 issue 2 Cover and Back matter

  • Published online by Cambridge University Press:
    08 February 2012, pp. b1-b2
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  • AGS volume 150 issue 1 Cover and Back matter

  • Published online by Cambridge University Press:
    20 December 2011, pp. b1-b3
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Page 4 of 4