Table 4: Analysis of variance summary of the effects of tillage [conventional tillage (CT) and no-tillage (NT)] and site position on the difference in aboveground dry matter and yield from 2018 and 2019 between inside and outside the gas sampling base collars and the difference between the inside-base-collar yield and the whole-field combine yield from 2018 under furrow-irrigated rice production at the Rice Research and Extension Center near Stuttgart, AR. Bolded values were considered significant at the 0.05 level.

Tillage

 

Site Position

2018 Aboveground Dry Matter

2018 Yield

2019 Aboveground Dry Matter

2019 Yield

2018 Collar Yield vs. Whole-field Yield

 

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CT

 

 

Up-slope

0.43

0.2

0.28

0.4

0.14

Mid-slope

0.46

0.02

0.82

0.87

0.07

Down-slope

0.03

0.01

0.78

0.98

0.04

NT

 

 

Up-slope

0.78

0.12

0.51

0.34

< 0.01

Mid-slope

0.01

0.67

0.08

0.46

0.45

Down-slope

0.12

0.04

0.45

0.28

0.06