Agriculture Ecology

How do pesticides that regulate plant growth work?

• They attract predators of the pest.

• They disrupt the pest's life cycle

• They allow crops to recover from pests and grow faster.

• They cause pests to stop growing so that they stay too small to cause damage.

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Benefits of GMO crops include

• lower cost, keep coming back each year to grow, no problems
• slower growth, increased insects, an decreased plant defenses
• Less water to grow, resistant to pests, resistant to disease
• increased profits to seed companies, happier farmers, and happy plants.

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What were the benefits of the "green revolution"?

• It reduced the price of food and improved the lives of many people,

• It increased the amount of organic foods available in markets and reduced the cost of production.

• It created environmentally friendly pesticides

• It created "super foods"

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What is the primary benefit of the process of terracing crops provide

• more crops due to more space

• less soil erosion due to less surface runoff

• less water needed for irrigation

• farming with machines on steep hill slopes can take place

What is a huge problem with the overuse of pesticides

• bioaccumulation in the tissue of animals is passed through the food chain

• Over time pesticide resistant species will become less abundant

• high output of food

• an increase of fertilizers use

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Why does salination occur? Water from wells used for irrigation have______________

• nitorgen

• phosphorous

• salt

• impurities

What benefit does intercropping vegetables such as corn with beans have?

• provides nutrients to the ground

• provides moisture to the ground

• increases the input in the system

• holds the soil together

The population of people has increased ________ while the food production has increased linearly

• linearly

• exponentially

• inversely

• suddenly

The process of nutrients or minerals being removed from soil by dissolving in water

• salinization

• aeration

• compaction

• leaching

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Which is NOT true regarding of the mechanization of agriculture?

• The use of machines encourages farmers to grow several types of plants on a single farm.

• There is an economic advantage to using machines when fuel prices are low.

• There is an economic advantage to using machines when cost of labor is high.

• Mechanization allows farms to take advantage of economies of scale.

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