Eighty plots were arranged on double-row beds separated
by a drainage ditch 7.6 m in width. Each plot
was composed of 6 trees in row with a total of 12
trees/plot (;93 m2). Only the 4 center trees per plot
were sampled, although the whole plot received treatment.
A 5-tree buffer was maintained at the end of
each planting bed. Plots were arranged in a completely
randomized design with eight experimental treatments
and 10 replications. In tests 2 and 3, where
fewer than eight treatments were applied, unused
plots were still treated with nematodes.