Use of nonlinear programming to determine the economically optimal energy density in laying hens diet during phase 1
M. Afrouziyeh1*, M. Shivazad2, M. Chamani1 and G. Dashti3
1Science and Research Branch, Islamic Azad University, Tehran, Iran.
2Department of Animal Science, University of Tehran, Karaj, Tehran, Iran.
3Department of Agricultural Economic, University of Tabriz, Tabriz, Iran.
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