44.2.3 - Methods to Determine IR
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Practice Questions
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What is Soil Moisture Deficit?
💡 Hint: Think about how much water is required compared to what is available.
What is the purpose of the Crop Coefficient?
💡 Hint: Consider how crops vary in water usage.
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Interactive Quizzes
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What is the Soil Moisture Deficit?
💡 Hint: Think about the relationship of soil moisture and its capacity.
True or False: The Pan Evaporation Method uses actual crop data to estimate water needs.
💡 Hint: What does the method actually measure?
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Challenge Problems
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A farmer wants to irrigate a field. The CWR is 120 mm, effective rainfall is 25 mm, groundwater contribution is 10 mm, and initial soil water is 5 mm. Calculate the irrigation requirement.
💡 Hint: Identify each contributing factor carefully.
During a hot season, a crop shows a Kc of 1.2 and the reference ET₀ is 6 mm/day. Calculate the crop's ET.
💡 Hint: What does this Kc value indicate during hot weather?
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