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“Modifications of soil nitrogen pools in response to alfalfa root systems and shoot mulch”
91: 471-477.
1999.
2000.
2000.
1997.
“Simple model to estimate field-measured soil water limits”
42: 1609-1614.
1999.
“Models of kernel number in maize”
Special Publication 29: 75-88.
2000.
“The KBS LTER Project”
: 86-92.
1991.
1993.
1993.
“Weed aboveground and seedbank community responses to agricultural management systems”
11: 1586-1601.
2001.
2001.
2001.
“Dinitrogen fixation”
: 241-257.
1999.
“Establishing pathways of energy flow for insect predators using stable isotope ratios: field and laboratory evidence”
109: 108-113.
1997.
“Temporal trends in nitrogen isotope values of nitrate leaching from an agricultural soil”
146: 219-227.
1998.
“Nitrogen transformations and NO3- removal at a soil-stream interface: a stable isitope approach”
12: 1027-1043.
2002.
2000.
1995.
1997.
1998.