Sustainable Agriculture Literature Review - Boulder County

! ! !!
"#$%&!'())! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! )=!>1.;#-2!
!
Figure 3: Historical and Forecast GHG Emissions for
Boulder County by Sector (tCO2e) 54
The largest source of GHG emissions for most crop systems comes from nitrous oxide
(N2O) emissions from fertilized soils (Figure 4), 55, 56 with additional emissions coming
from irrigation, on-farm energy use, and manure sources, with each of these varying in
their net emissions depending on the system. 57, 58 The relative contributions of GHG
emissions generated from global on-farm agricultural practices, not including
contributions from transportation, are presented in Figure 4.
Figure 4: Global GHG Emissions of Agricultural Practices 59
Note: CH4 - methane; N2O - nitrous oxide; and CO2 - carbon dioxide.
"+)"
!*+,-#./#012!34$.%+1-+$2!
5.-2$#-+$2!627.28!