After maize, the most important crop in the U.S. mixed crop and livestock region is
A) wheat.
B) soybeans.
C) barley.
D) fruits and vegetables.
E) sugar beets.
Answer: B
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An atmospheric carbon dioxide level of 450 ppm is widely considered to be an irreversible climate change, or ____________________.
Fill in the blank(s) with the appropriate word(s).
If air at sea level with a temperature of 27 C is forced up a mountain slope and the air's dew point at the condensation level is 14 degree C, at what elevation will condensation begin?
What will be an ideal response?
A(n) ____________________ ____________________ mechanism enhances an existing trend in a system
Fill in the blank(s) with correct word
The backshore ________.
A. is found between high- and low-tide levels B. is the same as the low-tide terrace C. is part of the foreshore D. lies under the surf zone E. is the high and dry part of the beach