Research Article

Carbon Dioxide Emissions as Affected by Alternative Long-Term Irrigation and Tillage Management Practices in the Lower Mississippi River Valley

Table 1

Analysis of variance summary of the effects of irrigation, tillage, residue level (residue), year, and their interactions on estimated season-long CO2 emissions at the University of Arkansas’ Lon Mann Cotton Research Station near Marianna, AR, on a silt-loam soil. Interactions and main effects that are considered significant are indicated by bolded text (). This analysis ignores the burning treatment in the design.

Treatment effectSeason-long
CO2 emissions

Irrigation0.243
Tillage0.020
 Irrigation tillage0.383
Residue0.512
 Irrigation residue0.097
 Tillage residue0.699
  Irrigation tillage residue0.759
Year<0.001
 Irrigation year0.044
 Tillage year0.366
 Residue year0.689
  Irrigation tillage year0.277
  Irrigation residue year0.926
  Tillage residue year0.455
   Irrigation tillage residue year0.838