In various parts of the world, soil phosphorus is associated with which of the following environmental problems?

A) soil degradation because of depletion of soil phosphorus
B) eutrophication of lakes because of a build-up of soil P in the watersheds
C) toxic levels of phosphate in groundwater supplies
D) both A and B
E) all of the above


D

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What was responsible for the violence in "Bleeding Kansas"? Why might the violence be viewed as a "prelude to Civil War"?

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Flowering intervals are controlled to a large degree by the length of ____ periods

Fill in the blank(s) with correct word

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