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Free Practice Quiz Question List

06. Agriculture, Soil, and Food Systems Online Quiz Questions

Use this free practice quiz with 20 questions to review 06. Agriculture, Soil, and Food Systems, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

A farmer wants to reduce water loss in a dry region by delivering water directly near crop roots. Which irrigation method is most appropriate?

  1. A

    Flood irrigation

  2. B

    Drip irrigation

  3. C

    Furrow irrigation

  4. D

    Basin irrigation

02
Choose one
1 point

A farm has repeatedly lost most of its harvest when one crop-specific pathogen spreads. Which change would most directly reduce the risk of the same type of loss in future seasons?

  1. A

    Planting a single crop variety over a large field

  2. B

    Removing all noncrop vegetation around a field

  3. C

    Growing multiple crop species together or in rotation

  4. D

    Applying pesticides on a fixed schedule regardless of pest abundance

03
Choose one
1 point

A farmer observes severe runoff on a sloping field after heavy rain. Which practice would most directly slow the movement of water downslope?

  1. A

    Plowing across the slope along contour lines

  2. B

    Plowing straight up and down the slope

  3. C

    Removing crop residues after harvest

  4. D

    Increasing the field's irrigation rate

04
Choose all
1 point

Which two practices would most directly reduce both soil erosion and the movement of agricultural nutrients into waterways? Select all correct choices.

  1. A

    Planting a cover crop during the off-season

  2. B

    Leaving fields bare between cash crops

  3. C

    Maintaining vegetated strips beside streams

  4. D

    Increasing tillage frequency to expose more soil

05
Choose all
1 point

A grower is revising a fertilizer plan to follow the 4R nutrient-management approach. Which two actions are consistent with that approach? Select all correct choices.

  1. A

    Apply extra fertilizer as insurance against any possible nutrient deficiency

  2. B

    Apply only the amount crops can use

  3. C

    Apply immediately before a forecasted heavy rain

  4. D

    Place nutrients near plant roots and away from waterways

06
True or false
1 point

True or false: Waterlogging can damage crops because excess water reduces the oxygen available to roots.

  1. A

    True

  2. B

    False

07
True or false
1 point

True or false: Integrated pest management always prohibits the use of chemical pesticides.

  1. A

    True

  2. B

    False

08
Written response
1 point

What is the agricultural term for the amount of crop produced per unit of land, such as kilograms of wheat per hectare?

09
Written response
1 point

How many connected dimensions of food security are identified in the material?

10
Fill in the blank
1 point

When irrigation water evaporates and leaves dissolved salts in the root zone, the resulting soil-degradation process is called .

11
Fill in the blank
1 point

The conversion of atmospheric nitrogen into plant-usable forms by bacteria associated with legumes is called .

12
Open ended
1 point

Explain how excessive fertilizer application can lead to fish kills in a downstream lake. Include the major ecological steps in the process.

13
Choose one
1 point

A field repeatedly trafficked by heavy machinery develops poor infiltration and shallow crop roots. Which explanation best fits the soil science in the material?

  1. A

    Heavy machinery increases pore space and improves infiltration

  2. B

    Heavy machinery compresses soil, reducing pore space and limiting roots

  3. C

    Heavy machinery increases soil biodiversity by disturbing aggregates

  4. D

    Heavy machinery prevents all runoff by sealing soil pores

14
Choose one
1 point

After a field is left bare, intense raindrops strike the soil and dislodge individual particles before runoff becomes concentrated. Which stage of water erosion is occurring?

  1. A

    Sheet erosion

  2. B

    Splash erosion

  3. C

    Rill erosion

  4. D

    Gully erosion

15
Choose one
1 point

A farmer adds beans to a crop rotation and later needs less synthetic nitrogen fertilizer. Which explanation best accounts for this result?

  1. A

    They increase soil salinity by concentrating dissolved salts

  2. B

    They prevent all forms of pest damage

  3. C

    They add biologically available nitrogen through nitrogen-fixing bacteria

  4. D

    They increase the rate at which groundwater is pumped

16
Choose one
1 point

A vegetable grower wants to deliver water directly near plant roots while reducing evaporation and runoff. Which irrigation method best fits this goal?

  1. A

    Flood irrigation

  2. B

    Furrow irrigation

  3. C

    Center-pivot sprinkler irrigation

  4. D

    Drip irrigation

17
Choose one
1 point

A lake receives runoff from an overfertilized field and later experiences a fish kill. Which sequence most plausibly explains the event?

  1. A

    Excess fertilizer, algal growth, decomposition, and oxygen depletion

  2. B

    Excess fertilizer, increased oxygen production, and improved fish habitat

  3. C

    Pesticide resistance, soil formation, and increased groundwater recharge

  4. D

    Groundwater depletion, land subsidence, and reduced soil compaction

18
True or false
1 point

True or false: Improving irrigation efficiency always reduces a region’s total agricultural water withdrawals.

  1. A

    True

  2. B

    False

19
Written response
1 point

What soil property describes the relative proportions of sand, silt, and clay particles?

20
Written response
1 point

A farm harvests 8,000 kg of wheat from 4 hectares. What is the yield, in kg/ha?