Water diversion and pumping has allowed humans to grow crops in areas where natural supplies have been limited. A major challenge that exists in these regions has been _______________.
A) soil erosion
B) high pesticide use
C) low crop diversity
D) salinization of soils
E) high trophic- level efficiency
Correct Answer:
Verified
Q21: No- till farming would be most beneficial
Q22: Corn (maize)was first domesticated in present- day
Q23: A soil deficient in humus would _.
A)have
Q24: Shelterbelts are to _ as terraces are
Q25: The breakdown of large rocks into smaller
Q27: The results of the overapplication of fertilization
Q28: pH influences _
A)soil clumpiness
B)soil compaction
C)the number of
Q29: Planting _ between regular crops will help
Q30: We lose 5 to 7 million hectares
Q31: _ refers to the agricultural practices in
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