Environmental Science Practice Exam

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1. Which of the following cultivation practices would increase soil erosion on a sloping land?

Question 1 options:

Contour farming.

Terracing.

Conventional tillage.

Conservation tillage.

Strip cropping

2. The dominant mechanism of phosphorus losses from agricultural soils to waterways in the Canadian prairies is throughQuestion 2 options:

soil erosion

intensive rainfall

dust storms

snowmelt runoff

leaching to groundwater

3. Which of the following agricultural activity contributed mostly to salinization of soils, globally?

Question 3 options:

Irrigation with poor quality water.

Cultivating salt tolerant crops.

Application of pesticides

Growing cover crops.

Conventional tillage practices.

4. According to USEPA and Health Canada guidelines, the threshold for nitrate-nitrogen in drinking water is

Question 4 options:

1 milligrams of nitrate- nitrogen per liter of drinking water ( 1 mg/L)

100 milligrams of nitrate- nitrogen per liter of drinking water (100 mg/L)

10 milligrams of nitrate- nitrogen per liter of drinking water (10 mg/L)

5 milligrams of nitrate- nitrogen per liter of drinking water (5 mg/L)

50 milligrams of nitrate- nitrogen per liter of drinking water (50 mg/L)

5. Which of the following “best Management Practice” will be most effective in reducing phosphorus losses from agricultural lands in Manitoba to Lake Winnipeg?

Question 5 options:

Practising conservation tillage instead of conventional tillage

Establishing edge of field vegetative buffers

4R nutrient management (right source, rate, placement, and timing)

Converting annual crop lands to perennial forage

Manure application during late fall and winter

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