TY - RPRT TI - Soil respiration and photosynthetic uptake of carbon dioxide by ground-cover plants in four ages of jack pine forest AU - Robert G. Striegl AU - K.P. Wickland PY - 2001 DO - 10.1139/cjfr-31-9-1540 UR - https://pubs.usgs.gov/publication/70023019 ID - 70023019 ER -