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2001.
“Carbon sequestration- The need for an integrated climate system approach”
82: 2021-2021.
2001.
“Overlooked issues in the U.S. National Climate and IPCC assessments”
52: 11-Jan.
2001.
“Generalised model for NOx N2O from soils.”
106: 17403-17419.
2001.
“Do land-use patterns influence nest-site selection by burrowing owls (Athene cunicularia hypugaea) in northeastern Colorado?”
79: 1038-1045.
2001.
“Policy implications of human-accelerated nitrogen cycling.”
52: 281-320.
2001.
“Exchange of gaseous nitrogen compounds between agricultural systems and the atmosphere.”
228: 17-27.
2001.
“Re-growth and biomass partitioning in forages under nitrogen and CO2 regimes: differences among species of three functional groups”
41: 78-86.
2002.
“Problems in evaluating regional and local trends in temperature: an example from eastern Colorado, USA”
22: 421-434.
2002.
“The influence of land-use change and landscape dynamics on the climate system- relevance to climate change policy beyond the radiative effect of greenhouse gases.”
360: 1705-1719.
2002.
“Regional analysis of litter quality in the central grassland region of North America”
13: 395-402.
2002.
“Soil-atmosphere exchange of CH4, CO2, NOx, and N2O in the Colorado shortgrass steppe under elevated CO2”
240 (11): 201-211.
2002.
“Managing soil denitrification”
57: 505-513.
2002.
“Environmental challenges associated with needed increases in global nitrogen fixation”
63: 101-116.
2002.
“Looking beneath the surface”
298: 1903-1904.
2002.
“Grazing refuges, external avoidance of herbivory and plant diversity”
99: 113-130.
2002.
“Effects of nitrogen availability on the growth of native grasses and exotic weeds.”
55: 94-98.
2002.
“Carbon exchange rates and species composition of grazed pastures and exclosures in the shortgrass steppe of Colorado”
93: 421-435.
2002.
“Stable nitrogen and carbon pools in grassland soils of variable texture and carbon content”
5: 461-471.









