Table 2: Analysis of variance summary of the effects of year (2018 and 2019), tillage [conventional tillage (CT) and no-tillage (NT)], site position (up-, mid-, down-slope), sampling time (1600, 2000, 2400, 0400, 0800, and 1200 hours), and their interactions on carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) fluxes measured from a silt-loam soil during the 2018 and 2019 rice growing seasons at the Rice Research and Extension Center near Stuttgart, AR.
Source of variation |
CO2 |
CH4 |
N2O |
|
________________ P ________________ |
||
Year |
0.068 |
< 0.001 |
< 0.001 |
Tillage |
0.051 |
< 0.001 |
< 0.001 |
Year × tillage |
0.318 |
< 0.001 |
< 0.001 |
Position |
0.020 |
< 0.001 |
< 0.001 |
Year × position |
0.003 |
0.018 |
< 0.001 |
Position × tillage |
0.071 |
< 0.001 |
< 0.001 |
Year × tillage × position |
0.960 |
0.004 |
0.516 |
Time |
< 0.001 |
< 0.001 |
< 0.001 |
Year × time |
< 0.001 |
< 0.001 |
< 0.001 |
Tillage × time |
0.641 |
< 0.001 |
< 0.001 |
Position × time |
< 0.001 |
< 0.001 |
< 0.001 |
Year × tillage × time |
0.379 |
< 0.001 |
< 0.001 |
Year × position × time |
0.005 |
< 0.001 |
< 0.001 |
Tillage × position × time |
0.726 |
< 0.001 |
< 0.001 |
Year × tillage × position × time |
0.293 |
< 0.001 |
< 0.001 |