ABSTRACT
Temperature is commonly recognized as a key factor in crop productivity, but assessing the importance of temperature in precise quantitative terms is an evasive goal. Nevertheless, field observations over the centuries and more recent studies in controlled environment facilities such as temperature-regulated greenhouses, plant growth chambers, and phytotrons provide considerable information on the role of temperature in controlling plant growth and development. Temperature begins to affect crop yield when the seed from the previous crop is being formed and continues to have an effect through all growth stages until the day of final harvest.
