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“Interannual variability of NDVI and their relationship to climate for North American shrublands and grasslands”
25: 721-733.
1998.
“Functional and structural convergence of temperate grassland and shrubland ecosystems”
8 (1): 194-206.
1998.
1998.
1998.
1998.
1998.
“Closing the global atmospheric N2O budget: nitrous oxide emissions through the agricultural nitrogen cycle”
52: 225-248.
1998.
1998.
1998.
1998.
“Methane and nitrous oxide fluxes in an acid oxisol in western Puerto Rico: Impact of tillage, liming and fertilization”
30: 2087-2098.
1998.
“A perspective on N-fertilizer production and use, and the Kyoto Climate Change Convention Protocol”
September: 6-Jun.
1998.
“Soil processes and global change”
27: 221-229.
1998.
1998.
1998.
“Global Climate Change: What does it mean for Western rangelands?”
mid-March: 14-Dec.
1998.
1998.
1998.
1999.
1999.