Where are the effects of soil salinization most likely to be seen?a.inland farmlandb.mountain communitiesc.coastal farmlandd.coastal cities
Soil color only reflects the amount of organic matter present in soil.
There is no direct way to reduce soil compaction caused by agricultural practices.
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
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
Which of the following is not a defining characteristic of soil?a.mineral compositionb.humidityc.textured.color
What kind of vegetation do fertile, well-developed alfisols support?a.desert scrubb.peat bogs and marshlandc.temperate forestsd.tropical rainforest
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.
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.
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