The climatic growing period is calculated by means of a model developed by the Food and Agriculture Organization of the United Nations (FAO, 1978) to estimate the length of growing period under either moisture-limiting or temperature-limiting conditions, or both. Under rainfed conditions, both moisture and temperature can be limited. Under irrigated conditions, only temperature is to be considered a limiting factor.
The temperature-limited growing period is calculated with reference to a temperature threshold, below which there is no growing period, in this case 5°C, as the contiguous period with mean temperature above 5°C.
The climatic growing period is calculated by means of a model developed by the Food and Agriculture Organization of the United Nations (FAO, 1978) to estimate the length of growing period under either moisture-limiting or temperature-limiting conditions, or both. Under rainfed conditions, both moisture and temperature can be limited. Under irrigated conditions, only temperature is to be considered a limiting factor.
The temperature-limited growing period is calculated with reference to a temperature threshold, below which there is no growing period, in this case 5°C, as the contiguous period with mean temperature above 5°C.
