Exam 9: Soil and Agriculture
Describe the goals and effects of industrial agriculture.
The injection of large amounts of fossil fuels, mechanization of traditional farming techniques for growing and transporting crops, and the development of synthetic fertilizers, herbicides, and insecticides have greatly expanded humanity's ability to produce food and have been instrumental in allowing food production to keep pace with population growth. However, efficiency has dictated that crops be grown in monocultures, with huge amounts of land devoted to a single crop species. This has resulted in increased use of pesticides and chemical fertilizers, resulting in a host of negative environmental impacts. The Green Revolution, which promised greater yields of staple crops, especially in developing nations, has indeed delivered as promised but has damaged soils in the process and, with heavy dependence on pesticides and fertilizers, has become increasingly expensive for poorer farmers to practice.
_______________ is the loss of more than 10% of soil productivity in arid areas due to such factors as erosion, soil compaction, overgrazing, and forest removal.
D
_______________ refers to the agricultural practices in which the members of a farming family produce only enough food for themselves and do not make use of large- scale irrigation, chemical fertilizer, or machinery and technology.
C
Leaching and the rate of movement of water would be greatest in a soil classified as _______________
The Conservation Reserve Program pays farmers to _______________.
The U.S. agency charged with slowing soil degradation is the _______________.
Shelterbelts are to _______________ as terraces are to _______________.
Read the following scenario and answer the question below.
Early People and Agricultural Beginnings
Long ago, two sisters were talking as they returned from their morning trip to collect mushrooms, seeds, berries, and green leaves for the day's meals. The younger woman was watching the progress of a small rabbit as it hopped across the path and toward the clan's trash midden (refuse heap), where broken tools (made of bone, stone, or shell)were tossed, and where discarded food was thrown. She noticed the rabbit stop and begin nibbling at the many new, green shoots sprouting across one side of the midden. She walked over to look, and she saw that some of last year's discarded dried fruits were growing. Surprised and interested, she called her sister over to discuss this find.
-Which of the following choices is something brought about by the beginning of agriculture?
The fundamental geological material for soils in a particular area
Tommy and Teagan are learning the process of good home gardening and decide to help their parents as best as they can. Every day they walk along rows of bean plants, carefully inspecting each plant for insects, and removing any that they find. However, the bean plants do not grow well, and few beans form. Their parents notice the poor beans, inspect the plants and soil, and tell the children that walking around the plants every day has hurt the plants by _______________
Until about 10,000 years ago, our species depended on _______________
Read the following scenario and answer the question below.
Early People and Agricultural Beginnings
Long ago, two sisters were talking as they returned from their morning trip to collect mushrooms, seeds, berries, and green leaves for the day's meals. The younger woman was watching the progress of a small rabbit as it hopped across the path and toward the clan's trash midden (refuse heap), where broken tools (made of bone, stone, or shell)were tossed, and where discarded food was thrown. She noticed the rabbit stop and begin nibbling at the many new, green shoots sprouting across one side of the midden. She walked over to look, and she saw that some of last year's discarded dried fruits were growing. Surprised and interested, she called her sister over to discuss this find.
-It is probably true that _______________.
Read the following scenario and answer the question below.
Early People and Agricultural Beginnings
Long ago, two sisters were talking as they returned from their morning trip to collect mushrooms, seeds, berries, and green leaves for the day's meals. The younger woman was watching the progress of a small rabbit as it hopped across the path and toward the clan's trash midden (refuse heap), where broken tools (made of bone, stone, or shell)were tossed, and where discarded food was thrown. She noticed the rabbit stop and begin nibbling at the many new, green shoots sprouting across one side of the midden. She walked over to look, and she saw that some of last year's discarded dried fruits were growing. Surprised and interested, she called her sister over to discuss this find.
-The next step in this story would likely be that this woman and her sister ______________
Planting _______________ between regular crops will help replace depleted nitrogen.
Corn (maize)was first domesticated in present- day _______________.
Erosion can result in a vicious cycle of worsening erosion because _______________.
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