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
6
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
Differentcountriesanddifferentraceshavedifferent【11】.InChina,itis
[originaltext]W:Whatapity.Wecouldn’tseeStarWarslastnight!M:Yes,it
Ofthe143nativelanguagesinMexico,60areatriskofbeingsilencedfore
《中药材生产质量管理规范》的适用范围是A.药品生产企业生产中成药的全过程 B.
对于在用桥梁,以下()的成果报告中应包括桥梁承载能力评定结论。A.桥梁特殊
下列关于国有资产评估报告制作要求的说法中,错误的是()。A.资产评估报告可以用
(2015年)根据《测绘作业人员安全规范》,下列关于测绘内业作业场所安全说法管理
站用直流电源系统可研初设审查由所属管辖单位运检部选派相关()人员参与
幂级数内的和函数为()。
(2020年真题)下列抽样方法中,属于概率抽样的是()A.系统抽样 B.
最新回复
(
0
)