Table 2.

Estimates of maize stover C_RM found in literature [4,5,41,42,43,44,45,46,47,48,49,50,51,52,53,54].

Study	Cost of Stover
Perlack et al., 2003 [41]	$43.10–$56.10/dry metric tonne (Mid-point $49.60)
Eggeman et al., 2005 [42]	$35/dry metric tonne
Graham et al., 2007 [5]	$33/dry metric tonne
Sendich et al., 2008 [43]	$40/dry metric tonne
Dutta et al., 2009 [44]	$60.10/dry metric tonne
Sokhansanj et al., 2010 [45]	$74/dry metric tonne (baled), $84/dry metric tonne (chopped) and $86/dry metric tonne (pelletised) (assumed pelletised in this calculation)
Kazi et al., 2010 [46]	$83/dry tonne
Humbird et al., 2011 [47]	$58.50/dry tonne
Gonzalez et al., 2012 [48]	$80.3/dry tonne
Fiegel et al., 2012 [49]	$85.40/dry tonne
Vadas et al., 2013 [51]	$44.09/dry tonne (most expensive)
Tao et al., 2013 [52]	$58.50/dry tonne
Meyer et al., 2013 [50]	$58.50/dry tonne
Petrou et al., 2014 [53]	$58.50/dry tonne
Ou et al., 2014 [54]	$83/dry tonne
Thompson et al., 2014 [4]	$88.19/dry tonne