Generally speaking, summer grains, such as corn and summer
wheat, are
planted near the end of winter when freezing temperatures are not expected to continue for more than a few weeks, and they take about 110 days to
mature, then another 30 - 60 days to dry sufficiently to harvest for storing as seed.
Forty years ago, North India produced only
wheat, but with the advent of the earlier
maturing high - yielding
wheats and rices,
wheat could be harvested in time to
plant rice.