官方APP下载:英语全能特训(微信小程序版,支持苹果手机、安卓手机)
创办于2003年
UNSV记不住?那就记中文谐音“忧安思危”吧!
  Slow and Steady Wins the Race!
UNSV英语学习频道 - Slow and steady wins the race!
公众微信服务号
英语全能特训(微信公众服务号)
UNSV英语学习频道淘宝网店
客服短信:18913948480
客服邮箱:web@unsv.com
初级VIP会员
全站英语学习资料下载。
¥98元/12个月

AGRICULTURE REPORT - Corn, Part 1

阅读次数:


VIP会员专享下载:(非VIP会员无权下载!如果想下载,但还不是VIP会员,请点此订购
下载方式:使用鼠标右键(注意是鼠标右键!)点击下面的MP3音频/MP4视频链接,然后选择“另存为…”。
PDF节目文稿 PDF节目文稿  MP3节目录音 MP3节目录音 
文章正文
同步字幕

This is the VOA Special English Agriculture Report.

Corn is an important crop in many parts of the world. However, some people are concerned that corn has become too important in agricultural planning and production.

Graphic Image
Graphic Image

Michael Pollan is an expert in plants and agriculture. He wrote a popular book called "The Botany of Desire." The book discusses how humans and plants have developed together. Mister Pollan also has spoken about the use of corn in agriculture and other industries. He says that American farmers grow too much corn.

Recently, Mister Pollan spoke to the Christian Science Monitor newspaper. He told the newspaper that corn is popular because it grows well with fertilizer. Today, farmers produce about six times more corn per hectare than farmers did one- hundred years ago. This is the result of new kinds of corn and the use of large amounts of fertilizer.

A field
of guinea corn in Nigeria
A field of guinea corn in Nigeria

Modern fertilizers can be made in a number of ways. Corn mostly uses fertilizer that is high in nitrogen. Nitrogen fertilizer is made by combining nitrogen from the air with hydrogen from natural gas. In the United States, large oil companies produce the chemical base used for nitrogen fertilizer.

Researchers for the Department of Agriculture have shown that corn requires about eighty-nine kilograms of fertilizer per hectare. Many crops require less fertilizer. Some crops require just as much. However, corn has lower amounts of protein, vitamins and minerals than other crops.

Graphic Image
Graphic Image

Corn is used to feed cows for about four months before they are killed for meat. The result is meat, or beef, that is high in fat, which makes the beef taste better.

However, cattle do not normally eat grain. Their stomachs and intestines do not process grain well. Instead, their stomachs produce much more acid than is normal. Mister Pollan says this condition permits harmful bacteria to survive and reproduce. For this reason, farmers must give cattle drugs to control bacteria. Also, the meat of corn-fed cattle lacks some nutrients found in the meat of cattle that eat mostly grass.

Corn has become the most important grain for feeding cattle raised for beef. Yet, some experts say it is not the best food for cattle. Next week, we will tell about other industrial uses for corn. Some of them may be surprising.

This VOA Special English AGRICULTURE REPORT was written by Mario Ritter

网友的学习评论(0条):
版权所有©2003-2019 南京通享科技有限公司,保留所有权利。未经书面许可,严禁转载本站内容,违者追究法律责任。 互联网经营ICP证:苏B2-20120186
网站备案:苏ICP备05000269号-1中国工业和信息化部网站备案查询
广播台