The concept of the heat unit (or degree day), known since the mid-18th century already, revolves around the development of a plants or organism`s being dependent upon the accumulated heat to which it
The concept of the heat unit (or degree day), known since the mid-18th century already, revolves around the development of a plants or organism`s being dependent upon the accumulated heat to which it
Abstract The objective of this study was to evaluate the adaptation of lettuce cultivars based on day-degree greenhouse methods in the Gurguéia Valley. The experiment was carried out in a protected en
