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ECONOMIC ASPECTS OF THE INCLUSION OF DRIED GRASS IN DAIRY‐COW RATIONS
Author(s) -
Crabtree J. R.
Publication year - 1971
Publication title -
grass and forage science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.716
H-Index - 56
eISSN - 1365-2494
pISSN - 0142-5242
DOI - 10.1111/j.1365-2494.1971.tb00635.x
Subject(s) - forage , yield (engineering) , energy density , mathematics , inclusion (mineral) , marginal cost , zoology , food science , chemistry , economics , biology , agronomy , microeconomics , physics , theoretical physics , thermodynamics , mineralogy
A linear programming model was formulated to calculate a least‐cost ration for lactating dairy cows with respect to certain nutritional constraints. The model was used to derive the price at which dried forage of a stated digestihle crude protein content (DCP) and metabolizable energy content (ME) would just become included in a least‐cost feed. Marginal costs for DCP and ME of £0.057/ kg and £0.0096/Mcal, respectively, were calculated. These were found to be fairly Insensitive to changes in milk yield. Inclusion prices were slightly lower than current market prices.