@article {KNZ00371, title = {Transformed vegetation index for measuring spatial variation in drought impacted biomass on Konza Prairie, Kansas}, journal = {Transactions of the Kansas Academy of Science}, volume = {95}, year = {1992}, pages = {93 -99}, keywords = {LTER-KNZ}, doi = {10.2307/3628024}, author = {Nellis, M.D. and J. M. Briggs} }