Question

exam lesson name: introduction to agriculture science
exam number: 700792rr
exam guidelines
exam instructions
question 12 of 20 :
select the best answer for the question.

1. how can manure contribute to eutrophication?

a. manure causes soil to hold fewer nutrients, contributing to eutrophication.
b. manure doesnt contribute to eutrophication.
c. manure applied in areas with little rainfall will contribute to eutrophication.
d. manure applied to soil that already has a high phosphorus concentration will contribute to eutrophication.
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Explanation:

To solve this, we analyze each option:

• Option A: Manure enriches soil with nutrients, not reduce holding, so A is wrong.
• Option B: Manure can contribute to eutrophication (adds nutrients like P), so B is wrong.
• Option C: Little rainfall means less runoff, so less chance of eutrophication from manure here, C is wrong.
• Option D: Manure has phosphorus. If soil already has high P, adding manure (more P) can lead to runoff into water bodies, causing eutrophication (excess nutrients cause algal blooms). So D is correct.

Answer:

D. Manure applied to soil that already has a high phosphorus concentration will contribute to eutrophication.