Relationships between root density of the African grass Hyparrhenia diplandra and nitrification at the decimetric scale: an inhibition-stimulation balance hypothesis.
J C Lata, K Guillaume, V Degrange, L Abbadie, and R Lensi
Proc Biol Sci. 2000 March 22; 267(1443): 595–600. PMCID: PMC1690563