Lawson, G.J., Hairiah, K., van Noordwijk, M., Soumare, A., Groot J.R.
This chapter takes a look at the 'hidden half', because interactions between trees and crops for below-ground resources are often as important as those for the light and above-ground space (Anderson and Sinclair, 1993).
van Noordwijk, M.; Lawson, G.J.; Soumare, A.; Groot J.R.; Hairiah, K. Root distribution of trees and crops: competition and/or complementarity. (1996)