Average values (± SD) of the measured variables for blueberry and weeds in plots colonized by C. peregrina and D. spicata subjected to the three fertilization treatments.

Measured variables included lowbush blueberry fruit yield (t ha-1), number of fruits produced (106 ha-1), individual fruit mass (mg), aboveground vegetative biomass (AGVBM; g m-2), fruit yield: aboveground vegetative biomass ratio, and weed aboveground biomass (AGBM; g m-2) under the three N-fertilization treatments in plots having C. peregrina or D. spicata as companion weed species. Values not sharing the same letters are significantly different (P C. peregrina area vs. D. spicata area).