Assuming that the intercropping treatments occurred on 8 beds
in a 1 ha field with 9800 m of bed length, the estimated number of
open alyssum inflorescences per head of lettuce or per m2 of field
area differed significantly between treatments (F6,38.1 = 169.6,
P < 0.001) ranging from 2 to 15 per head of lettuce, or 14–
92 per m2 of field area (Fig. 5B). This figure also illustrates the clear
positive trend between alyssum transplant density per ha and the
number of open inflorescences per head of lettuce or per m2 of field
area. Averaged across treatments, the estimated number of
open inflorescences per head of lettuce was slightly lower
(F1,38.1 = 10.1, P = 0.003) in 2008 (6.1 ± 0.5, mean ± 95% CI) than