Average values (± SD) of the measured variables for blueberry and weeds in plots colonized by <i>C</i>. <i>peregrina</i> and <i>D</i>. <i>spicata</i> 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 <0.05). Roman letters are used to compare N-fertilization treatments, whereas Greek letters are used to compare the two areas of the field (i.e., C. peregrina area vs. D. spicata area).