Radiation Use Efficiency of Cotton in Two Contrasting Environments

Yield variability in cotton (Gossypium hirsutum L.) from year to year in different environments (geographical locations) is a major production problem for farmers (Oosterhuis, 00 ). Higher yields have been recorded in the drier environment of California, compared to the more humid environment of Arkansas. However, the effect of environmental factors, such as temperature, relative humidity, and vapour pressure deficit, on the radiation use efficiency in cotton have not been described for contrasting environments.