3.3. Leaf weight
The analysis of variance of the data showed significant effects
of companion crops and sowing date on leaf length. The interaction
of companion crops · sowing date was also significant
for this trait (Table 1). The highest (306.5 g) and the lowest
(207.2 g) leaf weights were obtained for corn planting with clover
at the same time and dill planting 15 days after corn,
respectively (Table 2). Synchronic planting also resulted in
more yield of corn leaves compared with planting cover crops
15 days after corn (Table 2). Mahmoodi, 2003 reported that
the presence of weeds caused weight loss of corn leaves.