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Agronomy QUESTION #2029
Question 1
The Penman-Monteith equation is used in irrigation management to estimate:
  • Soil water holding capacity
  • Reference evapotranspiration (\(ET_0\)) as the standard for computing crop water requirements✔️
  • The hydraulic conductivity of soil
  • The critical period of water requirement for a crop
Correct Answer Explanation
The FAO Penman-Monteith equation is the globally accepted standard for computing reference evapotranspiration (\(ET_0\)) using climatic variables (temperature, humidity, wind speed, solar radiation). Actual crop ET is then computed as \(ET_c = K_c \times ET_0\), where \(K_c\) is the crop coefficient.