In-direct energy consumption / low energy requirements / Manure management / electricity / transportation / energy consumption / electricity usage / minor energy use component / energy monitoring / i.e. electricity / energy use activities / feed systems / direct energy consumption / energy requirement / overall energy consumption / effluent management / fan energy use / energy consumer / energy use components / energy use / little energy consumption / energy efficiency / energy use contributor / effluent management systems / gas levels / energy usage / energy / /