Agriculture and Environment Water Resources & Irrigation Management 2

Question 1

Which practice most effectively reduces agricultural irrigation water loss from evaporation?

Accepted Answer

Irrigating at night or early morning

Answer

Irrigating during midday when temperatures are highest

Answer

Using overhead sprinklers in windy conditions

Answer

Increasing irrigation frequency throughout the day

Question 2

A farm 'water budget' primarily tracks:

Accepted Answer

Water inputs, outputs, and storage to ensure sustainable use

Answer

The financial cost of purchasing water rights and pump electricity

Answer

The number of water rights and permits owned by an operation

Answer

Monthly precipitation totals from weather station records

Question 3

What is deficit irrigation as a water management strategy?

Accepted Answer

Applying less water than full crop requirements during drought-tolerant growth stages to conserve water

Answer

A situation where a farm has insufficient water rights to meet crop needs

Answer

Irrigation that exclusively uses recycled or reclaimed wastewater

Answer

Over-irrigating during early season to build soil water reserves

Question 4

Which cover crop practice best improves soil water retention in dryland farming systems?

Accepted Answer

Selecting deep-rooted cover crops that improve soil structure and organic matter

Answer

Tilling deeply before planting to break up hardpan layers

Answer

Applying synthetic fertilizers before cover crop establishment

Answer

Burning cover crop residue to release nutrients before the next season

Question 5

In irrigation management, what does the 'uniformity coefficient' measure?

Accepted Answer

How evenly water is distributed across an irrigated field

Answer

The chemical uniformity of irrigation water quality across a season

Answer

The consistency of soil texture and type in irrigated fields

Answer

The uniformity of crop yields across different zones of a field

Question 6

What is the primary purpose of surge irrigation in furrow irrigation systems?

Accepted Answer

To improve water distribution uniformity by delivering water in intermittent pulses

Answer

To rapidly flood fields during drought emergencies for maximum infiltration

Answer

To increase downstream water pressure in drip irrigation systems

Answer

To flush accumulated salts from soil through high-volume water application

Question 7

Which irrigation management practice can lead to soil salinization over time if not properly addressed?

Accepted Answer

Continuous irrigation without adequate leaching fractions

Answer

Drip irrigation with fresh, low-salinity water sources

Answer

Rainwater harvesting for supplemental crop irrigation

Answer

Subsurface tile drainage to remove excess soil moisture