Regardless of the hybrids, yields in the twin- row model with
30” spacing and a single- row configuration with 36” spacing
performed better than that in a single- row configuration with
30” and 15” spacing (Figure 2). The latter (15”) had the
lowest yield among all treatments (Figure 2) and the lowest
harvest population (data not shown), which might be due to
the planting method.
Hybrid 1 (112RM) yielded better than hybrid 2 (110RM)
across treatments, except in the 30” spacing treatment
(Figure 3). Hybrid 1 in the 30” spacing had the highest grain
moisture (17.2%) and root lodging, which may be due to
replanting after (data not shown) nutrient applicator. There
were no noticeable differences in corn ear size between the
hybrids grown under different treatments throughout the
season. Normally, late maturing hybrids intercept more light
than early maturing hybrids because a late maturing hybrid
has more and larger leaves. Therefore, early maturing hybrids
should generally be planted thicker than late maturing hybrids
to compensate for their sparse leaf canopies