Manure management might help decrease GHG gas from animal agriculture.


Emissions of CH4 after land spreading of manures are insignificant (Collins et al., 2011) relative to the large losses from manure storage and enteric fermentation. Measures to reduce N2O emissions after land spreading include choice of application method, and optimising rate and timing of application to match crop requirements, and a complex interaction with soil type and soil moisture (Thomsen et al., 2010). Choice of manure application technique appears to have little impact on direct N2O emissions and indirect emissions due to NH3 emissions and nitrate leaching (Velthof et al, 2010). There is an increase of N2O emissions curvi-linearily when N application rates exceed crop N requirements (Van Groenigen et al., 2004; Cardenas et al., 2010). Proper timing of application has been shown to influence both direct and indirect N2O emissions after land spreading of manures (Weslien et al., 1998; Chambers et al., 2000; Thorman et al., 2007).
 

Relational Mapping