Drip irrigation is ________
A) more than twice as efficient at conserving water as traditional conventional irrigation
B) used in aquaculture
C) only half as efficient at conserving water as center-pivot irrigation
D) typically used in combination with flood-and-furrow irrigation
E) more likely to result in soil salinization than other irrigation techniques
Answer: A
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Today, the largest employer in the Washington, D.C., area is the ________
Fill in the blank(s) with correct word
The process by which natural vegetation at a particular location develops in a sequence of stages involving different plant communities is known as ____
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