首页
登录
职称英语
Even plants can run a fever, especially when they’re under attack by insects
Even plants can run a fever, especially when they’re under attack by insects
游客
2025-05-02
7
管理
问题
Even plants can run a fever, especially when they’re under attack by insects or disease. But unlike humans, plants can have their temperature taken from 3,000 feet away—straight up. A decade ago,adapting the infrared scanning technology developed for military purposes and other satellites, physicist Stephen Paley came up with a quick way to take the temperature of crops to determine which ones are under stress. The goal was to let farmers precisely target pesticide (杀虫剂) spraying rather than rain poison on a whole field, which invariably includes plants that don’t have pest(害虫)problems.
Even better, Paley’s Remote Scanning Services Company could detect crop problems before they became visible to the eye. Mounted on a plane flown at 3,000 feet at night, an infrared scanner measured the heat emitted by crops. The data were transformed into a color-coded map showing where plants were running "fevers". Farmers could then spot-spray, using 40 to 70 percent less pesticide than they otherwise would.
The bad news is that Paley’s company closed down in 1984, after only three years. Farmers resisted the new technology and long-term backers were hard to find. But with the renewed concern about pesticides on produce, and refinements in infrared scanning, Paley hopes to get back into operation. Agriculture experts have no doubt the technology works. "This technique can be used on 75 percent of agricultural land in the United States, "says George Other of Texas A&M. Ray Jackson, who recently retired from the Department of Agriculture, thinks remote infrared crop scanning could be adopted by the end of the decade. But only if Paley finds the financial backing which he failed to obtain 10 years ago. [br] Farmers can save a considerable amount of pesticide by_____.
选项
A、resorting to spot-spraying
B、consulting infrared scanning experts
C、transforming poisoned rain
D、detecting crop problems at an early stage
答案
A
解析
依据文章第二段最后一句。
转载请注明原文地址:http://tihaiku.com/zcyy/4058547.html
相关试题推荐
Thesoldierwas______ofrunningawaywhentheenemyattacked.A、scoldedB、charged
Thebadanddampweatherinthehotareawouldenabletheplantstoget____quick
TheattackoftheWorldTradeCenterwillleavea_____impressiononthosewhoha
(51)Beingangryincreasestheriskofinjury,especiallyamongmen,newres
(51)Beingangryincreasestheriskofinjury,especiallyamongmen,newres
(51)Beingangryincreasestheriskofinjury,especiallyamongmen,newres
Thisdictionaryis______intendedforAmericanlearnersofChinese.A、especiallyB
Evenplantscanrunafever,especiallywhenthey’reunderattackbyinsects
Evenplantscanrunafever,especiallywhenthey’reunderattackbyinsects
Evenplantscanrunafever,especiallywhenthey’reunderattackbyinsects
随机试题
TheschoolboardlistenedquietlyasJohnreadthedemandsthathisfollowers___
[originaltext]Whenwillwegoshoppingtomorrow?[/originaltext][audioFiles]aud
Somemarriagesseemtocollapsesosuddenlythatyou’dneedacrystalballt
根据《地下铁道工程施工及验收规范》的有关规定,隧道采用钻爆法施工时,必须事先编制
初产妇,宫内孕40周,潜伏期已达17小时,现宫口开大3cm,胎膜未破,先露头,S
女性,23岁,乏力、皮下淤血半个月,外周血WBC66×10/L,并可见大量幼稚细
我国最早的学前教育实验中心是()A.南京鼓楼幼稚园 B.湖北幼稚园 C.南京
A为一家非上市公众公司,2015年拟收购甲、乙、丙、丁、戊五家公司股权,购买时甲
下列关于自动喷水灭火系统管网试压和冲洗的要求,不正确的有()。A.管网冲洗的水
政策性风险属于()。A.系统性风险 B.非系统性风险 C.可分散风险 D
最新回复
(
0
)