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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