About Lesson
- Explains the relationship between growth duration and temperature.
- A degree day is the mean temperature above base temperature (minimum temp).
- The concept of degree days can be used to estimate the suitability of a crop for a given climatic region assuming water is available.
- This can also provide an index for comparing the thermal needs of plants as well as for indicating the suitability of a location for a particular crop.
- Calculation of GDD is useful for predicting harvesting dates and secondly, they are useful to select optimum date of planting.
