Question: all of these contribute directly to fertile topsoil except

Answer: bed rock chemical reactions

Question: many people worldwide are malnourished, in part because pood production is

Answer: sufficient, but distribution is inconsistent

Question: which of the following agricultural products requires the least amount of energy?

Answer: wheat

Question: traditional agriculture typically depends upon

Answer: manual or animal plowing and synthetic fertilizers

Question: all of these are environmental problems associated with pesticide use in the us except

Answer: an ongoing application of DDT

Question: one potential way to deal with the problem of over harvesting is intensifying

Answer: aquaculture

Question: products obtained from livestock include

Answer: leather, wool,eggs,meat, and manure

Question: erosion is most likely when the soil is

Answer: bare and exposed to wind and rain

Question: salinization may be caused by

Answer: long term irrigation

Question: earth’s available arable land is being reduced by

Answer: fast growing population, soil erosion, and desertification