Falge et al

Grass
Little Washita  Fgpp/day = 6.3 FNep/day = -2.46 (source)  Fre = 8.76
Shidler 10.7 2.26 (sink) Fre = 8.44

Bondville C4 7.82 3.13 FRe = 4.69
Bondville C3 6.66 -1.27 Fre = 7.93
Ponca 6.62 0.74 Fre = 5.88
Soroe 7.54 2.08 Fre = 5.46  mean Fre = 6

total mean Re 6.9   gc/m2/day
mean NEP = 0.7 (sink)
mean GEP = 7.6
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Choose Q10 of 2.0 and R10 of 4.5 to get good RE
Choose Qy of 0.025 and Amax of 25.0
Choose seasonal 
NEE: 63 gc/m2
ER: 621 gC/m2
GEP: 684 gC/m2