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Tools

Green Area Index Tool

Green Area Index Tool

'GAI (Green Area Index), the ratio of leaf green area to the area of ground on which the crop is growing, is a useful tool in canopy management.

Below are a series of reference photographs for you to compare with your crop. For further details on how to use GAI, particularly in the management of forward crops see Topic Sheet 82 - Managing forward crops of oilseed rape.'

GAI 0.2

GAI 0.6

GAI 1.2

GAI 1.8

GAI 2.6

GAI 2.7