Total useful energy = energy contained in animal products and services + useful heat energy - deduction for energy equivalent of nitrogen lost.
(Total useful energy = energy; contained; in animal products and services) (Total useful energy = energy contained in animal products and services + useful heat energy - deduction for energy equivalent of nitrogen; lost; )
Total useful energy = energy Total useful energy = energy contained in animal products and services + useful heat energy - deduction for energy equivalent of nitrogen
contained lost
in animal products and services