What is Effective Rainfall?
Effective Rainfall is the portion of total rainfall that is actually available for crop use. Losses occur due to runoff, deep percolation, and evaporation.
Standard Formula
Effective Rainfall (mm) = Total Rainfall − Losses
Where losses include runoff, evaporation, and percolation beyond the root zone.
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Important Notes:
• Effective rainfall is always less than total rainfall
• Used for irrigation scheduling and NIR calculation
• Highly influenced by soil type and slope
• Effective rainfall is always less than total rainfall
• Used for irrigation scheduling and NIR calculation
• Highly influenced by soil type and slope
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