Agricultural/Bioengineering Irrigation and Drainage Engineering 1

Question 1

Which irrigation method delivers water directly to the root zone of individual plants through emitters?

Accepted Answer

Drip or trickle irrigation

Answer

Drip irrigation delivers water slowly and directly to the root zone via emitters, minimizing evaporation and runoff for high efficiency.

Question 2

Irrigation efficiency is defined as the ratio of:

Accepted Answer

Water beneficially used by crops to water delivered to the field

Answer

Irrigation efficiency is the percentage of water delivered to a field that is actually used beneficially by crops, excluding losses to deep percolation and runoff.

Question 3

The concept of 'consumptive use' or evapotranspiration (ET) refers to:

Accepted Answer

Total water used by plants through transpiration plus soil evaporation

Answer

Evapotranspiration (ET) is the combined water loss from plant transpiration and soil surface evaporation, representing the crop's consumptive water use.

Question 4

Which drainage system uses perforated pipes buried below the soil surface to remove excess water?

Accepted Answer

Subsurface tile drainage

Answer

Subsurface tile drainage uses perforated plastic or clay pipes buried in the soil to collect and remove excess groundwater, lowering the water table.

Question 5

In furrow irrigation, water is applied by:

Accepted Answer

Flowing through small channels between crop rows

Answer

Furrow irrigation delivers water through small parallel channels (furrows) cut between crop rows, allowing it to infiltrate laterally into the root zone.

Agricultural/Bioengineering Practice Test

Agricultural/Bioengineering Practice Test

Agricultural/Bioengineering Irrigation and Drainage Engineering 1