Growing Degree Days
- Commerce, Trade & Industry -
Agriculture & Forestry Dictionary
Definition
An agricultural production concept defining practices, measurements, or controls used to grow and harvest crops efficiently and responsibly. It governs field operations, resource inputs, and monitoring steps that influence yield, quality, and environmental performance. It does not ensure outcomes without appropriate execution and cannot substitute for site assessment and ongoing monitoring.
Growing Degree Days
Commerce, Trade & Industry Dictionary
Definition
A cumulative thermal index obtained by summing daily temperature units above a specified base temperature over a period. Each day contributes max(0, Tmean − Tbase) under the chosen convention; GDD quantifies thermal exposure relevant to temperature‑driven biological development and must be calculated with the base temperature and averaging/truncation rules stated for a given species or model.