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Incorporating Environmentally Compliant Manure Nutrient Disposal Costs into Least-Cost Livestock Ration Formulation AgEcon
Hadrich, Joleen C.; Wolf, Christopher A.; Black, J. Roy; Harsh, Stephen B..
Livestock rations are formulated to minimize feed cost subject to nutritional requirements for a target performance level, which ignores the potentially substantial cost of disposing of nutrients fed in excess of nutritional requirements. We incorporate nutrient disposal costs into a modified least-cost ration formulation model to arrive at a joint least-cost decision that minimizes the sum of feed and net nutrient disposal costs. The method is demonstrated with phosphorus disposal costs on a representative dairy farm. Herd size, land availability and proximity, crop rotation, and initial soil phosphorus content are shown to be important in determining phosphorus disposal costs.
Tipo: Journal Article Palavras-chave: Environmental compliance; Linear programming; Livestock rations; Manure disposal; Agribusiness; Environmental Economics and Policy; Livestock Production/Industries; C61; Q12; Q52.
Ano: 2008 URL: http://purl.umn.edu/45525
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Economically Optimal Distiller Grain Inclusion in Beef Feedlot Rations: Recognition of Omitted Factors AgEcon
Jones, Crystal; Tonsor, Glynn T.; Black, J. Roy; Rust, Steven R..
With the rapid expansion of the ethanol industry, the feeding landscape familiar to the feedlot industry is changing. While concerns regarding rising corn prices persist, many within the industry are looking at distiller’s grains, a by-product of ethanol production, to serve as a feed substitute. The question remains as to what extent these two feed sources are substitutable. The purpose of this study is to identify the economically optimal inclusion rate of distiller’s grains in beef feedlot rations, considering an array of often omitted factors. Most currently prevailing recommendation rates are strictly biologically based and frequently reference only one feeding trial. Unique economic factors considered in this research include the impact of by-product...
Tipo: Conference Paper or Presentation Palavras-chave: Distiller’s grains; Livestock rations; Manure disposal cost.
Ano: 2007 URL: http://purl.umn.edu/37574
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