Elevated atmospheric CO2 and soil fertility effects on growth, mycorrhizal colonization, and xylem water potential of juvenile ponderosa pine in a field soil

Walker, R. F., Geisinger, D. R., Ball, J. T. (1997). Elevated atmospheric CO2 and soil fertility effects on growth, mycorrhizal colonization, and xylem water potential of juvenile ponderosa pine in a field soil, Plant Soil, 195, 25-36