Table 3: Summary of carbon dioxide (CO2) fluxes measured from a silt-loam soils at the Rice Research and Extension Center near Stuttgart, AR across years (2018 and 2019), sampling times (1600, 2000, 2400, 0400, 0800, and 1200 hours), and site positions (up-, mid-, and down slope). Reported values are least square means.

 

Position

Year

Time

Up

Mid

Down

 

 

________________ mg m-2 h-1 ________________

2018

1600

2092 AB

2542 A

1761 B-D

 

2000

1197 F-K

1548 C-F

1169 G-L

 

2400

1017 H-N

1276 E-I

971 J-O

 

400

894 L-O

950 K-O

878 M-O

 

800

784 N-Q

784 N-Q

884 M-O

 

1200

1528 C-F

1573 B-F

1412 D-G

 

 

 

 

 

2019

1600

1463 C-G

1858 BC

1935 BC

 

2000

886 L-O

993 I-O

1659 B-E

 

2400

770 O-Q

1017 H-N

1371 D-H

 

400

611 Q

636 PQ

1157 G-M

 

800

883 M-O

861 NO

1240 F-K

 

1200

801 N-P

1290 E-H

1270 F-J

†Means across years, times, and site positions with different letters are different at P < 0.05.