首页
登录
职称英语
The farm is a major marketplace for millions of tons of synthetic fertilizers
The farm is a major marketplace for millions of tons of synthetic fertilizers
游客
2023-12-23
17
管理
问题
The farm is a major marketplace for millions of tons of synthetic fertilizers and pesticides, and for advanced machinery and the fuel required to run it. The modern superfarm, large and highly capitalized, is resource dependent compared with the diversified small farms that were once dominant. On diversified farms, major energy needs may be supplied by resident humans and animals. Soil fertility may be maintained by alternating cash crops and restorative crops, and also by returning animal manure to the soil. This fanning model of relatively self-sufficient agriculture, and the way of life associated with it, are still economically viable, as demonstrated by prosperous Amish farmers and other practitioners of "alternative" agriculture. Particularly relevant to today’s mainstream agriculture are the energy-saving practices on large "organic" farms, which are thoroughly mechanized but which minimize the use of pesticides and synthetic fertilizers.
By comparison, mainstream American agriculture has until lately been careless in its use of energy, water, and land. When fossil energy was cheap, applications of fertilizers and pesticides paid large dividends, so farmers were encouraged to use these products. Soon most farmers used too much fertilizer and pesticide. Farmers in dry regions enjoyed an era of cheap water, obtained from publicly subsidized irrigation systems or from pumping groundwater using inexpensive energy. The soil too was expendable as demand grew for U.S. agricultural products.
The period of extraordinary profligacy in the use of soil, water, and fossil fuels may well be at an end. The new structure of large farms is quite sensitive to cost factors. These adaptive farms, whose development was assisted by public tax, subsidy and research policies, have access to capital, technologies, and management skills, enabling them to switch relatively quickly to resource-conserving practices—for example, to low-tillage system that requires less fuel, that shepherds soil moisture, and that may reduce soil erosion. It seems likely that federal programs that have enlarged our farms, therefore, have had a further result of creating the potential for a more conserving agriculture. With respect to energy use. for example, energy costs per unit of output are lower for large farms, mainly because these farms quickly economized on energy as costs rose. In the future, according to one authoritative assessment, "agricultural production is likely to use capital and land more intensively but energy, fertilizer and labor less intensively". [br] According to the passage, which of the following is NOT true?
选项
A、The farming model and the way of life on diversified farms are workable.
B、Large ’organic’ farms use large amounts of pesticides and synthetic fertilizers.
C、The new adaptive farms are capable of resource-conserving practices.
D、To reduce soil erosion is a resource-conserving practice.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3298844.html
相关试题推荐
"We’renotbringinginmillionsofdollars,"saysadirectorofdevelopment."Bu
"We’renotbringinginmillionsofdollars,"saysadirectorofdevelopment."Bu
[originaltext]Everyoneknowsaboutunemployment.ButmillionsofworkingAm
[originaltext]Everyoneknowsaboutunemployment.ButmillionsofworkingAm
MillionsofbooksandanInternet-basedcampusnetworkareavailablefortheUni
MillionsofbooksandanInternet-basedcampusnetworkareavailablefortheUni
MillionsofbooksandanInternet-basedcampusnetworkareavailablefortheUni
[originaltext]Everyoneknowsaboutunemployment.ButmillionsofworkingAm
[originaltext]Everyoneknowsaboutunemployment.ButmillionsofworkingAm
[originaltext]Everyoneknowsaboutunemployment.ButmillionsofworkingAm
随机试题
[originaltext]W:Isitpossibletomakeacomfortablelivingfromarttoday?I
估算建设投资后需编制建设投资估算表,为后期的融资决策提供依据。按概算法分类,建设
以下关于资本的边际效率递减规律的表述正确的是()。A:资本的边际效率是使得预期收
蛋白质的消化酶主要来源于()A.小肠 B.胆囊 C.胃 D.肝脏
下列各项属于集体资产所有权界定范围的有( )。 A.集体所有的土地
()年秋季,中小学阶段各起始年级的学生原则上都将进入新课程。A.1999 B.
对认知结构迁移理论作出重要贡献的心理学家有()。 A.奥苏伯尔B.班杜拉
以下属于创造性思维特征的有()。 A.敏感性B.流畅性 C.灵活性D.
呈扁片状,背部有黄白色或灰绿色斑点散在,足趾底面具吸盘的是A.僵蚕 B.蛤蚧
公司在创立时首先选择的筹资方式是( )。A.融资租赁 B.向银行借款 C.
最新回复
(
0
)