Climate and Change in Ecosystems Answers

Contour farming is a method for plowing across the slope of steep hills.

Which of the following are some reasons for the variations in agricultural practices around the world?a.topographyb.traditionc.amount of rainfalld.all of the above

Which of the following is not true concerning tropical plantations? a.They are generally found in humid, tropical climates.b.Wheat and corn are common products of tropical plantations.c.Most crops from tropical plantations are exported.d.Cocoa, coffee and tea are common products of tropical plantations.

Which of the following best explains why soil conservation is important to human agriculture?a.Erosion prevention prevents millions of dollars in damage from mudslides.b.It is easier to prevent the degradation of old soil than it is to generate new soil.c.If the soil salinity gets too high crops will not be able to grow in it.d.Soil contamination is a hazard to human and animal health.

The high productivity of American agriculture is exemplified by _______.a.low crop yields per farm workerb.high crop yields per farm workerc.the small cultivated area per inhabitantd.the small cultivated area per farmer

Pastoral farming is best described as _______.a.a method of raising livestock and moving herdsb.an African method of agriculturec.a method of cultivating crops on poor soilsd.a common method of desert farming