TY - RPRT TI - Is photosynthetic enhancement sustained through three years of elevated CO2 in a 175 year old oaks? AU - Gardner, A. M. AU - Ellsworth, D. S. AU - Crous, K. Y. AU - Pritchard, J. AU - Mackenzie, R. A. PY - 2020 DO - 10.1101/2020.12.16.416255 UR - https://www.biorxiv.org/content/10.1101/2020.12.16.416255v1 ID - 10.1101/2020.12.16.416255 ER -