Do you know how to use the “Leaf Color Chart”

For the proper use of fertilizers in the paddy field, Punjab University of Agriculture is explaining how to use the “Leaf Color Chart” to know the requirement of nitrogen fertilizers.


• Apply basal dose of 25 kg urea per acre
• Start matching color of the first fully exposed leaf from the top with the LCC at 7 days interval after 14 days of transplanting.
• Whenever the greenness of 6 or more out of 10 leaves is lighter than LCC shade 4 apply 25 kg per acre.
• No urea should be applied if color of leaves is equal to or darker than LCC shade 4.
• Use of LCC should be discontinued after initiation of flowering and no more urea should be applied.

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