In which of the following agricultural situations are fertilizers least needed?
A) In a pumpkin patch that is harvested only in the fall, with the vines remain behind
B) Where 1,000 acres of corn are raised and harvested for export
C) A natural prairie pasture where cattle feed and defecate
D) A field where a farmer applies cow manure after harvesting hay
C
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How many people are estimated to live in acute poverty today in developing countries?
a. 1.4 billion b. 1.4 million c. 140,000 d. 82 million e. 1.8 billion
Two strategies have been successful in reducing birth rates. One alternative emphasizes reliance on education and health care, the other on distribution of contraceptives
Indicate whether the statement is true or false.
What does Pratt's model of isostasy describe better than Airy's model?
A) elevation differences between oceans and continents B) formation of rift valleys in continents C) elevation differences within areas of continental crust D) fault block elevations
Metamorphic rock forms from pre-existing rock when heat and pressure cause solid-state transformations.
Answer the following statement true (T) or false (F)