Comment on "Carbon-negative biofuels from low-input high-diversity grassland biomass".
Tilman et al. (Reports, 8 December 2006, p. 1598) argued that low-input high-diversity grasslands can provide a substantial proportion of global energy needs. We contend that their conclusions are not substantiated by their experimental protocol. The authors understated the management inputs required to establish prairies, extrapolated globally from site-specific results, and presented potentially misleading energy accounting.
Russelle
Michael P
MP
U.S. Department of Agriculture, Agricultural Research Service, St. Paul, MN 55108, USA. michael.russelle@ars.usda.org
Morey
R Vance
RV
Baker
John M
JM
Porter
Paul M
PM
Jung
Hans-Joachim G
HJ
D000383:Agriculture; D018533:Biomass; D002244:Carbon / Q000032:analysis; D002980:Climate; D017753:Ecosystem; D004736:Energy-Generating Resources; D007887:Fabaceae / Q000254:growth & development / Q000378:metabolism; D063245:Plant Development; D010944:Plants / Q000378:metabolism; D006109:Poaceae / Q000254:growth & development / Q000378:metabolism; D012987:Soil
D012987:Soil; D002244:Carbon