The 'base period' of a crop in irrigation terminology is:
Choose the correct answer
Time from monsoon onset to dry season
Total duration (days) from first to last irrigation for a crop in one season
Duration of the rabi season only
24-hour base for rainfall
Correct Answer
B. Total duration (days) from first to last irrigation for a crop in one season
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Base period B = total duration (days) from first watering (at time of sowing) to last watering (before harvest). It is the duration over which the crop needs irrigation water. Used in duty-delta relationship: Δ = 8.64 × B / D (where Δ = delta in metres, B = base period in days, D = duty in ha/cumec).
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