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Soil Water Budgeting and Evapotranspiration

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Soil Water Budgeting and Evapotranspiration

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Questions and Answers

What is the most effective method to estimate the effectiveness of rainfall in agriculture?

Day-to-day water balance of the rootzone (correct)

Potential evaporation/precipitation ratio method

The renfro equation

U.S. Department of Agriculture's soil conservation service method

What is the Net Irrigation Requirement (NIR) in agriculture?

Amount of water intercepted by the crop

Total amount of irrigation water to be supplied to the field

Amount of irrigation water to be supplied to the crop to satisfy its Evapotranspiration needs (correct)

Amount of water lost to percolation

What is the primary factor that determines the Project Intake Water Requirement (PIWR) in an irrigation system?

Cropping schedule

Efficiency of application of water between intake and field

Soil type and texture

Areas cultivated and different crops cultivated (correct)

Why is some rainfall not effective in agriculture?

All of the above Signup and view all the answers

What is the formula to calculate the Net Irrigation Requirement (NIR) in agriculture?

NIR = (Kc × ETo) - PEFF Signup and view all the answers

What is the purpose of the leaching requirement (LR) in irrigation system design?

To remove salts and other impurities from the soil Signup and view all the answers

What is the Gross Irrigation Requirement (GIR) in agriculture?

The total amount of irrigation water to be supplied to the field Signup and view all the answers

What is the primary factor that affects the Evapotranspiration (ET) rate in agriculture?

Weather conditions Signup and view all the answers

What is the purpose of data collection in irrigation system design?

To determine the crop water requirements Signup and view all the answers

What is the units of Net Irrigation Requirement (NIR) and Gross Irrigation Requirement (GIR) in agriculture?

mm/day Signup and view all the answers