In 1992, 24 corn hybrids were grown
under both irrigated and dryland conditions
and were harvested at 90% of the kernel milk
line. Growing condition and hybrid significantly
affected plant height and the number of
days to the tasseling and silking stages. Most
dryland hybrids had higher dry matter (DM)
contents than irrigated hybrids, but all 24 hybrids
had higher grain yields under irrigation.
Growing condition and hybrid also
significantly affected whole-plant DM and
stover yields and percentages of cob and
stover. The grain portion made the greatest
contribution to the higher whole-plant silage
yields for the irrigated hybrids compared to
their dryland counterparts.
