Agricultural sustainability depends upon an understanding and proper management of which of the following cornerstones of both ecosystem and food production?
A) Irrigation systems
B) Agricultural soils
C) The generation of new plant hybrids using genetic engineering
D) The agricultural technology necessary to plow, plant, and harvest
B
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List the three daily tide patterns and give examples of areas where each are common. What will be an ideal response?
Short-term changes in Pacific Ocean circulation are primarily responsible for climatic events associated with ____
a. glaciation b. global warming c. El Niño d. albedo
A map of global city-regions reveals
A. equal numbers of Alpha cities north and south of the equator. B. some of the largest cities in the world do not rank as Alpha cities. C. Tokyo, despite its size, is ranked Beta. D. there are more Beta cities than Gamma cities.
Which of the following has the highest density?
A. 1037 kg/m3 B. sigma-t = 13.6 C. 1011.7 kg/m3 D. sigma-t = 26.4 E. 1.039 g/cm3