CH Irrigation and Water Management 3

Question 1

Mulching around plants reduces irrigation needs primarily by:

Accepted Answer

Reducing soil surface evaporation

Answer

Adding nutrients to the soil

Answer

Increasing soil compaction

Answer

Lowering soil pH

Question 2

Graywater systems for landscape irrigation in the US typically use water from which household sources?

Accepted Answer

Laundry rinse water, bathroom sinks, and showers

Answer

Toilet flushes only

Answer

Kitchen sink and dishwasher water

Answer

Swimming pool backwash only

Question 3

Which soil texture typically requires the most frequent irrigation due to its low water-holding capacity?

Accepted Answer

Sandy

Answer

Clay

Answer

Silt loam

Answer

Silty clay loam

Question 4

Proper head-to-head coverage in a sprinkler design means:

Accepted Answer

Each head's throw radius reaches the adjacent head

Answer

Each head sprays double the distance between heads

Answer

Heads overlap by 75% of their radius

Answer

Each head covers exactly its rated square footage

Question 5

Tensiometers measure soil moisture by indicating:

Accepted Answer

Tension (suction force) with which the soil holds water

Answer

Volume of water stored in the soil

Answer

Depth of the water table

Answer

Ion concentration in soil water

Question 6

Rain sensors on irrigation systems are required by law in some US states because they:

Accepted Answer

Automatically override irrigation during and after sufficient rainfall

Answer

Improve water pressure regulation

Answer

Detect pipe leaks

Answer

Monitor controller battery levels