Table 2: Frequency of soil oxidation-reduction potential (Eh) fluctuations between aerobic ( +200 mV) and O2-limited (+200 mV < Eh > -150 mV) and between O2-limited and anaerobic (< 150 mV) conditions by site position (up-, mid-, and down-slope) tillage treatment [conventional tillage (CT) and no-tillage (NT)] combinations during the 2018 and 2019 growing seasons at the Rice Research and Extension Center near Stuttgart, AR.
|
Year |
Site Position |
Tillage |
Number of Aerobic/O2-limited Fluctuations |
Number of O2-limited/Anaerobic Fluctuations |
|
2018 |
Down-slope |
CT |
6 |
2 |
|
NT |
1 |
3 |
||
|
2019 |
Up-slope |
CT |
4 |
4 |
|
NT |
1 |
3 |
||
|
Mid-slope |
CT |
3 |
0 |
|
|
NT |
0 |
0 |
||
|
|
Down-slope |
CT |
1 |
2 |
|
|
|
NT |
1 |
3 |