After joining the Peace Corps, a volunteer's assignment is to help spread good agricultural practices to people living in the humid tropics. After receiving training, the volunteer most likely tells the local farmers to
A) use oxen or mules to deep plow and turn the soil to bring deep nutrients to the surface.
B) dig deeper wells to bring up water reserves that will triple the productivity of their fields.
C) start a water catchment, apply manure, mulch to their fields, and avoid tilling the soil if possible.
D) shift to crops like rice, which are more resistant to the natural pests and parasites.
C
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Which of the following gases will replace oxygen in the blood pigment hemoglobin and thereby reduce the transport of oxygen to the brain?
A. carbon dioxide B. carbon monoxide C. methane D. sulphur dioxide
Two major approaches to non-fossil-fuel energy alternatives are renewable energy and
A) nuclear power. B) geothermal. C) wind energy. D) solar energy.
How many different constitutional isomers are there with the molecular formula C2H3Br3?
A) 1 B) 2 C) 3 D) 4
Gecekondus (Turkey), favelas (Brazil), gourbevilles (North Africa) and bustees (India) all refer to urban
A) squatter settlements. B) market places. C) open spaces. D) high rent neighborhoods. E) transportation networks