. 2012 Jan 9;109(4):1074–1079. doi: 10.1073/pnas.1116364109

Table 2.

Potential impact of adoption of best management practices on energy use and global warming potential in irrigated maize in Tri-Basin NRD

Scenario	Total energy,^* GJ	Total GWP,^* Mg of CO₂e
Actual baseline^†	28,758	2,745
Potential^‡	22,018	2,180
Difference^§	−6,741 (−25%)	−566 (−21%)

See Materials and Methods for details on calculation of energy use and GWP under each scenario.

*Values are per 1,000 ha of irrigated maize in Tri-Basin NRD.

^†Based on actual frequency of fields under each type of irrigation system, tillage method, crop rotation, and source of energy for irrigation pumping.

^‡Based on full adoption of improved plant performance rating (90%), use of electrical power for irrigation water pumping, pivot irrigation, limited-irrigation, and optimal N management in current irrigated maize land area that is not already under these management practices.

^§Absolute and relative (in parentheses) difference in energy use and GWP under the potential scenario compared with actual baseline.