Which of the following is true about soil color?a.A dark color indicates that the soil is poor in organic matter.b.Bright yellow and red colors indicate large amounts of organic matter.c.Yellow or red hues in the soil indicate the presence of iron or aluminum.d.Yellow or red hues in the soil indicate the presence of calcium or magnesium.
Which of the following is not a characteristic of desert soils (aridisols)?a.accumulation of mineralsb.little organic matterc.sparse vegetationd.none of the above
Prairie soils (mollisols) are _______.a.poor in organic matterb.easy to cultivate and fertilec.poor in mineral nutrientsd.difficult to cultivate but fertile
Permafrost soil (gelisol) is _______.a.resistant to erosionb.fragilec.rich in microorganismsd.a fast developing soil
Explain whether or not you would expect the soil of flood plains (inceptisols and entisols) to be fertile.
Soils in different regions differ based on the _______.a.local climateb.topography of the landc.native organismsd.all of the above
How does over-irrigation lead to salinization?
Explain how the use of heavy machinery in an area can lead to an increase in the severity of flooding.
Explain why the presence of large amounts of organic matter alone does not result in fertile soil.
Explain why volcanic soil (andisol) is fertile.
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