Soil Around the World Answers

Why is volcanic soil (andisol) very fertile?a.It is rich in minerals from volcanic deposits.b.It is a young soil with low water retention.c.It has been leached of mineral nutrients.d.Volcanic activity warms the soil.

Lower temperatures lead to slower soil formation.

How is over-irrigation damaging to soil?a.It reduces the amount of organic material in soil.b.It results in the accumulation of salt near the soil surface.c.It increases the acidity of soil.d.It removes water from the water table.

Which of the following is not a defining characteristic of soil?a.mineral compositionb.humidityc.textured.color

Soil compaction results from _______.a.the reduction or elimination of pore space in soilb.the weight of heavy machinery on soilc.livestock walking over soild.all of the above

What characteristic is shared by both inceptisols and entisols, the soils of flood plains?a.They both have well-developed soil horizons and profiles.b.Both are young and only beginning to develop horizons and a soil profile.c.They are both at the final stage of soil development.d.None of the above

Where are the effects of soil salinization most likely to be seen?a.inland farmlandb.mountain communitiesc.coastal farmlandd.coastal cities

Why might soils rich in organic matter not be fertile?a.Soil fertility comes from a balance of organic matter and other mineral nutrients.b.Large amounts of organic material make soil retain too little water.c.Soil fertility is a result of the inorganic minerals present.d.Soils rich in organic material are always highly fertile.

Utilizing ultisols for agriculture requires _______.a.extensive irrigationb.fertilizer to balance the high alkalinity of the soilc.adding organic matter to supplement the shallow horizonsd.fertilizer to replace nutrients that leach from the soil

The organisms native to an area will impact the types of soil found in that area.