Environmental conditions during the 2013 growing season. (A) Monthlyaverage air temperature and solar radiation, (B) monthly total precipitation, and(C) weekly ambient air temperature and rainfall during the experiment (May31–November 1). Local weather data obtained from the Enviro-weather, MSU Michi-gan Automated Weather Network’s East Lansing station located at the research site.Long-term climate data (1981–2010) derived from NOAA, National Weather ServiceForecast Office database