The two experiments, henceforth referred to as Exp. 1 and Exp.
2, were set by using a completely randomized design with two
and three replicates, respectively. Treatments in both experiments
were the sole crops and intercrops of sunflower and soybean. Two
cultivars of each crop were sown in each experiment (Table 1).
Soybean cultivars were genetically modified to resist glyphosate.
Thus, eight treatments were included in the experiments, being
two sole crops of each soybean and sunflower and four intercrops
(2 soybean cultivars x 2 sunflower hybrids). Each treatment was
assigned to plots 5 m wide by 45 m long in both experiments [19].
Sole crops and intercrops were sown on the same date in each experiment (Table 1)