Exam 18: The Geography of Soils

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The proper name for the classification system in use in the Canada since 1975 is the Great Soil Groups system.

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What are the biotic and abiotic factors involved with soil formation?

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Cryosolic soils

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Heavy,expandable clay soils are classified as

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Which of the following are examples of soil forming factors?

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Which pedogenic regime occurs in cool,wet climates in areas of poor drainage,and results in the accumulation of humus-as well as a water-saturated layer of gray clay?

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The physical and chemical weathering of the upper lithosphere produces

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What material in the soil serves a similar role to that of clay because of its ion exchange capacity,ability to store water,and ability to bind particles together?

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A soil horizon that is 20 to 30 percent or more organic matter is labeled

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B horizons are often ________ in colour because of ________.

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Cryosolic soils

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The science that deals with the origin,classification,and distribution of soils is known as ________,whereas the science that deals with soil as a medium for plant growth is called ________.

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The ability of certain soil particles to transfer mineral ions between their surfaces and the soil solution is referred to as

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The Canadian System of soil classification has not been updated since the mid-1970s.

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If humus were lost from the soil due to excessive farming or soil erosion,which of the following could occur?

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The ability of colloids to attract ions means that

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Why is Kesterson National Wildlife Refuge so polluted with selenium? What has been done to alleviate the pollution? What are the long-term prospects for the refuge?

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The great grassland soils of the world are called

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A roughly equal mixture of sand,silt,and clay is called

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A few centimeters of prime farmland soil can take 500 years to mature.

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