Abstract
The effects of air temperature and precipitation on the yield of wheat variety ‘Norin 61’ in the experimental upland field in Saitama Prefecture were analyzed using data collected for the same cultivation method during a 45-year period (1951-1996). A negative correlation was observed between yield and mean air temperature from seeding to maturity. There was a significant negative correlation between yield and mean air temperature from seeding to heading, and also between yield and precipitation from heading to maturity. However, there was no correlation between yield and mean air temperature from heading to maturity. The yield of wheat variety ‘Norin 61’ in the upland field in Saitama Prefecture tends to decrease with increasing mean air temperature before heading and increasing precipitation after heading.
