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Experiments on the improvement of fertilizer application for Kyoho grapes. III. Diagnosis of the nutrient condition of the vine by means of leaf colour measurement



Experiments on the improvement of fertilizer application for Kyoho grapes. III. Diagnosis of the nutrient condition of the vine by means of leaf colour measurement



Bulletin of the Kanagawa Horticultural Experiment Station (30): 39-45



In experiments in 1980-82 grapevine leaf colour, measured with a Green Meter and a colour chart, was significantly correlated with leaf chlorophyll concentration, irrespective of the season, leaf position or vineyard site. The minimum number of leaves required to give an accurate assessment was ten.

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