extremes was found under the conditions of excess water in which biomass and yield were reduced by nearly two-thirds. There was no effect of temperature treatment on phenological development and all plants were at the same stage of development through the pollination stage. Increased night temperatures significantly increased the rate of senescence and maturity was achieved in these plants 15 days earlier than in the normal temperature chamber. The effects of high minimum temperatures increased the rate of senescence and decreased the ability of the plant to efficiently produce grain. The interactions of temperature and soil water content need to be understood in order develop effective adaptation practices for agronomic systems in response to climate extremes.