James A. Simpson

Effects of tree competition on corn and soybean photosynthesis, growth, and yield in a temperate tree-based agroforestry intercropping system in southern Ontario, Canada

Phillip E. Reynolds, James A. Simpson, Naresh V. Thevathasan et al. · Ecological Engineering · 2006 · 244 citations

Crop Production, Cropping Systems, Botany +11

Carbon isotope discrimination and oxygen isotope composition in clones of the F1 hybrid between slash pine and Caribbean pine in relation to tree growth, water-use efficiency and foliar nutrient concentration

Zhihong Xu, P. G. Saffigna, Graham D. Farquhar et al. · Tree Physiology · 2000 · 92 citations · Full text

Biodiversity, Biogeochemistry, Engineering +14

Biophysical and Ecological Interactions in a Temperate Tree-Based Intercropping System

Naresh V. Thevathasan, Andrew M. Gordon, James A. Simpson et al. · Journal of Crop Improvement · 2004 · 59 citations

Engineering, Botany, Cropping Systems +17

Six-year response of red oak seedlings planted under a shelterwood in central Ontario

Andrew M. Gordon, James A. Simpson, Peter A. Williams · Canadian Journal of Forest Research · 1995 · 45 citations

Red Oak, Engineering, Botany +12

Alternative conifer release treatments affect below- and near-ground microclimate

Phillip E. Reynolds, D. A. H. Buckley, James A. Simpson et al. · The Forestry Chronicle · 1997 · 23 citations · Full text

Near-ground Microclimate, Herbicide Treatments, Engineering +11