TY - RPRT TI - Photosynthetic and growth response of sugar maple ( Acer saccharum Marsh.) mature trees and seedlings to calcium, magnesium, and nitrogen additions in the Catskill Mountains, NY, USA AU - Bahram Momen AU - Shawna J Behling AU - Gregory B. Lawrence AU - Joseph H Sullivan PY - 2015 DO - 10.1371/journal.pone.0136148 UR - https://pubs.usgs.gov/publication/70159385 ID - 70159385 ER -