Answers IC Environmental Science - DeeringGlobal Connection: Microflora and Microfauna

Global Connection: Microflora and Microfauna Answers

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How can pesticide use be harmful to human agriculture?

The loss of beneficial microfauna can reduce soil productivity.

Pesticides eliminate harmful insect pests.

Pesticides target the elimination of beneficial soil microflora.

The use of pesticides kills all soil microflora and microfauna.

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How does overtillage harm soil?

Overtillage can increase the rate of humus decomposition.

Overtillage can increase the water carrying capacity of soil.

Overtillage can result in increased soil compaction.

Overtillage can increase the organic material in soil.

The relationship between bacteria and legumes that results in nitrogen is best described as _______.

parasitic

mutualistic

commensalistic

none of the above

Which of the following is a component of healthy soil ecosystems?

fungi

bacteria

nematodes

all of the above

The use of which of the following is not an agricultural practice that benefits soil microorganisms?

crop rotation

monoculture

companion planting

cover crops

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