Unit 38 Irrigation Technology (Ag Mechanics)

The gallons of water required to provide one ace-inch of water on five acres is

• 27000

• 50000

• 100000

• 135000

Peak use is the maximum amount of water needed for

• one day

• the season

• the year

• none of these

The irrigation system that adds water by flooding furrows is

• surface

• subirrigation

• sprinkler

• trickle

Valves to start and stop irrigation can be controlled automatically with

• solenoids

• laddenvalves

• filters

• emitters

Plants require most water

• at germination

• during early growth

• during growth and seed formation

• near harvest

Emitters are used to

• release water slowly into the soil

• release water rapidly into the soil

• water the tops of plants

• flood the furrows with water

Which is not a moisture sensor

• gypsum block and meter

• neutron probe

• philometer

• tensiometer

The number of acre-inches of water taken from the soil in one season by efficiently growing crops in various climates is called

• seasonal demand

• measuring humidity

• water from below

• season in demand

__________ irrigation works especially well for watering individual plants in a field.

• microtubing

• trickle

• dropletting

• surface

The spaghetti system is especially handy for ________ irrigation.

• spaghetti

• droplets

• container

• surface