Which of the following was not an element of the Green Revolution of the 1970s and 1980s?
A) integration of the scientific efforts of plant breeders, soil scientists, agronomists and pest management specialists
B) integrated pest management to reduce the need for chemical pesticides
C) high yielding cereal varieties that responded well to fertilizers and irrigation
D) monocultural systems that maximized the effects of the new varieties and technologies
E) greatly expanded use of irrigation water and chemical fertilizers
B
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PROBLEM 2.30 A vertical load P is applied at the center A of the upper section of a homogeneous frustum of a circular cone of height h, minimum radius a, and maximum radius b. Denoting by E the modulus of elasticity of the material and neglecting the effect of its weight, determine the deflection of point A.
Burn-through does not happen to molten metal until it reaches the ____________________ temperature.
Fill in the blank(s) with the appropriate word(s).
Determine the length of side g in centimeters to 4 significant digits.
Fill in the blank(s) with the appropriate word(s).