Jun 23, 2011 · 1. Scope and introduction. There is much interest in understanding effects of manure management on direct and indirect source of greenhouse gas (GHG) emissions, as manures contain substantial quantities of N, much of which is in inorganic forms (Anon., 2010), C (e.g., Paul et al., 1993, Møller et al., 2004a) and water – three essential factors controlling processes leading to production and