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Length_of_growing_period (Map Service)


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Current Version: 10.81

Service Description:

Length of growing period is defined as the period during the year when average temperatures are greater than or equal to 5oC (Tmean >=5o C) and precipitation plus moisture stored in the soil exceed half the potential evapotranspiration (P>0.5PET). A normal growing period is defined as one when there is an excess of precipitation over pet (i.e. a humid period). Such a period meets the full evapotransiration demands of crops and replenishes the moisture definite of the soil profile. An intermediate growing period is defined as one in which precipitation does not normally exceed PET but does for part of the year. No growing period is when temperatures are not conducive to crop growth or P never exceeds PET (FAO 1978).

Determining LGP is a difficult process that requires extensive calculations based on precipitation, evapotranspiration and soil moisture holding capacity. It also requires an understanding of the moisture requirements of specific crops since the growing period for many extends beyond the rainy season. Coarse resolution LGP data is available as part of IIASA/FAO’s initial GAEZ project (IIASA/FAO 2001). 

This length of growing period data was provided via personal communication from IIASA (Fischer 2009).



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Length of growing period is defined as the period during the year when average temperatures are greater than or equal to 5oC (Tmean >=5o C) and precipitation plus moisture stored in the soil exceed half the potential evapotranspiration (P>0.5PET). A normal growing period is defined as one when there is an excess of precipitation over pet (i.e. a humid period). Such a period meets the full evapotransiration demands of crops and replenishes the moisture definite of the soil profile. An intermediate growing period is defined as one in which precipitation does not normally exceed PET but does for part of the year. No growing period is when temperatures are not conducive to crop growth or P never exceeds PET (FAO 1978).

Determining LGP is a difficult process that requires extensive calculations based on precipitation, evapotranspiration and soil moisture holding capacity. It also requires an understanding of the moisture requirements of specific crops since the growing period for many extends beyond the rainy season. Coarse resolution LGP data is available as part of IIASA/FAO’s initial GAEZ project (IIASA/FAO 2001). 

This length of growing period data was provided via personal communication from IIASA (Fischer 2009).



Copyright Text: Fischer 2009 / IIASA-FAO

Spatial Reference:
102100

Single Fused Map Cache: true

Capabilities: Map,TilesOnly

Tile Info:
Initial Extent:
Full Extent:
Min Scale: 5.91657527591555E8
Max Scale: 2311162.217155

Min LOD: 0
Max LOD: 8

Units: esriMeters

Supported Image Format Types: PNG

Export Tiles Allowed: false
Max Export Tiles Count: 100000

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