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| Woodward, Simon J.R.. |
| A dynamical model of soil phosphorus carryover in grazed pasture provides the basis for bioeconomic optimization of fertiliser rates. A linear constraint is introduced to optimise the allocation of limited funds to fertiliser on several farm blocks, each of which represents a different land and/or stock class. The optimal constrained maintenance application of fertiliser to each block is calculated, and an heuristic approach to this equilibrium is suggested. In some cases this involves withholding of fertiliser from unresponsive blocks. The dynamical model and economic optimisation method have been implemented in a commercial fertiliser planning decision support tool Outlook. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1996 |
URL: http://purl.umn.edu/12297 |
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| Stevens, David R.; Woodward, Simon J.R.; Westbrooke, Victoria F.C.. |
| This paper describes the development of a learning package to support improved pasture quality on New Zealand deer farms. The first step has been to determine the specific requirements of deer farmers that will enable them to improve pasture quality decisions on-farm. Decision support software that interprets and demonstrates the impacts of pasture quality and animal physiology on the performance of young growing deer has also been developed. Key themes identified to aid pasture management decision-making included identifying the right pasture quality, management systems to maintain pasture quality and maximising the potential of livestock. This paper reports on the type of knowledge that deer farmers require in the learning package. |
| Tipo: Article |
Palavras-chave: Decision making; Deer; Growth rate; Learning packages; Pasture quality; Software; Farm Management. |
| Ano: 2005 |
URL: http://purl.umn.edu/123143 |
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