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Özkan, Ş.; Hill, J. |
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Title |
Implementing innovative farm management practices on dairy farms:a review of feeding systems |
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Journal Article |
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Year |
2015 |
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Turkish Journal of Veterinary and Animal Sciences |
Abbreviated Journal |
Turkish Journal of Veterinary and Animal Sciences |
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39 |
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1-9 |
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Keywords |
australia; dairy; double-cropping; feeding system; pasture-based; profitability; forage crop systems; south-west victoria; nutritive characteristics; interannual variation; botanical composition; herbage accumulation; growth-rates; pasture; australia; cows |
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Abstract |
The Australian dairy industry relies primarily on pasture for its feed supply. However, the variability in rainfall negatively affects plant growth, leading to uncertainty in dryland feed supply, especially during periods of high milk price. New feeding (complementary) systems combining perennial ryegrass with another crop and/or pasture species may have the potential to mitigate this seasonal risk and improve productivity and profitability by providing off-season feed. To date, the majority of research studying the integration of alternative crops into pasture-based systems has focused on substitution and utilization of alternative feed sources. There has been little emphasis on the impacts of integration of forage crops into pasture-based systems. This review focuses on pasture-based feeding systems in southeastern Australia and how transitioning of systems contributes to improved productivity leading to improved profitability for dairy farmers. |
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English |
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1300-0128 |
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LiveM |
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MA @ admin @ |
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4577 |
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Author |
Ruiz-Ramos, M.; Trnka, M. |
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Title |
Riesgos asociados a los eventos extremos meteorológicos para la producción de trigo en Europa |
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Report |
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2015 |
Publication |
Tierras |
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224 C6 - |
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92-98 |
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CropM |
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MA @ admin @ |
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2077 |
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Sinabell, F.; Schönhart, M.; Schmid, E. |
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Austrian Agriculture 2010-2050. Quantitative Effects of Climate Change Mitigation Measures. An analysis of the scenarios WEM, WAM, WAM+ and a sensitivity analysis of scenario WEM |
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Report |
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2015 |
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Studie des Österreichischen Instituts für Wirtschaftsforschung im Auftrag des Umweltbundesamts |
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Vienna, Austria |
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Österreichisches Institut für Wirtschaftsforschung |
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TradeM |
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MA @ admin @ |
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5017 |
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Sinabell, F.; Kappert, R.; Kaul, H.-P.; Kratena, K.; Sommer, M. |
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Title |
Maisanbau in Österreich. Ökonomische Bedeutung und pflanzenbauliche Herausforderungen |
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2015 |
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Studie des Österreichischen Instituts für Wirtschaftsforschung im Auftrag des Ökosozialen Forums |
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Österreichisches Institut für Wirtschaftsforschung |
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TradeM |
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MA @ admin @ |
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5018 |
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Author |
Mansouri, M.; Destain, M.-F. |
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Title |
Predicting biomass and grain protein content using Bayesian methods |
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Journal Article |
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Year |
2015 |
Publication |
Stochastic Environmental Research and Risk Assessment |
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Stoch. Environ. Res. Risk Assess. |
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29 |
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4 |
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1167-1177 |
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Keywords |
crop model; particle filter; prediction; ensemble kalman filter; parameter-estimation; particle filters; decision-support; state estimation; model; nitrogen; navigation; tracking; systems |
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This paper deals with the problem of predicting biomass and grain protein content using improved particle filtering (IPF) based on minimizing the Kullback-Leibler divergence. The performances of IPF are compared with those of the conventional particle filtering (PF) in two comparative studies. In the first one, we apply IPF and PF at a simple dynamic crop model with the aim to predict a single state variable, namely the winter wheat biomass, and to estimate several model parameters. In the second study, the proposed IPF and the PF are applied to a complex crop model (AZODYN) to predict a winter-wheat quality criterion, namely the grain protein content. The results of both comparative studies reveal that the IPF method provides a better estimation accuracy than the PF method. The benefit of the IPF method lies in its ability to provide accuracy related advantages over the PF method since, unlike the PF which depends on the choice of the sampling distribution used to estimate the posterior distribution, the IPF yields an optimum choice of this sampling distribution, which also utilizes the observed data. The performance of the proposed method is evaluated in terms of estimation accuracy, root mean square error, mean absolute error and execution times. |
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English |
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1436-3240 1436-3259 |
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CropM |
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MA @ admin @ |
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4664 |
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