时间:2019-01-11 作者:英语课 分类:农业与发展


英语课

AGRICULTURE REPORT

June 25, 2002: Organic Farming Study


By George Grow



(Photo -Scott Bauer)
This is the VOA Special English Agriculture Report.


Agricultural scientists in Switzerland have demonstrated the long-term effects of organic farming methods.
Organic farms use no man-made chemicals to increase crops or control insects and disease. The study showed
that organic fields produced fewer crops, on average, than other fields. However, the scientists say the organic
methods improved the health of the soil and used half as much energy.


Scientists at the Research Institute of Organic Agriculture in Frick, Switzerland, supervised
the study. They reported their findings in Science magazine, the publication of the
American Association for the Advancement 1 of Science.


It was one of the longest-running studies of its kind. The Swiss scientists compared the
effects of organic and traditional farming methods over a period of more than twenty years.
They grew crops on four fields of land in Switzerland.


Two fields were grown using traditional farming methods. The others were grown using
organic farming methods. The scientists grew potatoes, barley 2, winter wheat, beets 3 and
grass clover. The crops, planting methods, and soil use were similar in all the fields studied.


The study found that the organic fields produced about twenty percent fewer crops than the other fields.
However, the farmers used less fertilizer and energy on the organic fields. They found the organic fields were
healthier.


The scientists say the organic fields had more nutrients 4 in the soil. The soils in the organic fields also had more
biological activity than the other fields. The organic fields had more helpful organisms and a larger number of
different organisms. The organic fields had almost two times as many insects, including helpful insects. In
traditional farming, chemicals designed to kill harmful insects also can kill helpful ones.


The researchers say the findings show that organic crop production rates change little over time, and that soil
fertility increases. They say the findings suggest that organic farmers can help the environment by increasing soil
fertility.


Organic farming is becoming increasingly popular in some countries. Many people believe that eating organic
food is more healthful than eating food grown with chemicals. Some people are willing to pay more money to
buy organic food.


This VOA Special English Agriculture Report was written by George Grow.



Email this article to a friend
Printer Friendly Version



n.前进,促进,提升
  • His new contribution to the advancement of physiology was well appreciated.他对生理学发展的新贡献获得高度赞赏。
  • The aim of a university should be the advancement of learning.大学的目标应是促进学术。
n.大麦,大麦粒
  • They looked out across the fields of waving barley.他们朝田里望去,只见大麦随风摇摆。
  • He cropped several acres with barley.他种了几英亩大麦。
甜菜( beet的名词复数 ); 甜菜根; (因愤怒、难堪或觉得热而)脸红
  • Beets are Hank's favorite vegetable. 甜菜根是汉克最爱吃的蔬菜。
  • In this enlargement, barley, alfalfa, and sugar beets can be differentiated. 在这张放大的照片上,大麦,苜蓿和甜菜都能被区分开。
n.(食品或化学品)营养物,营养品( nutrient的名词复数 )
  • a lack of essential nutrients 基本营养的缺乏
  • Nutrients are absorbed into the bloodstream. 营养素被吸收进血液。 来自《简明英汉词典》
学英语单词
a crime against humanity
active attitude control system
advance speed
aggry
angle of list
anna mary robertson mosess
annulus cruralis
as cast structure
axial air-gap reluctance motor
be quick to do
bicyclopentadiene dioxide polyol ether resin
bismuth subchloride
bitter-brackish water desalination
breast anchor
CCD image sequential switcher
closed loop policy
communalising
conderis shirozui
congenital
current-controlled oscillator
customer engineer diskette
descending sequence
dial-up services
Edtac
EIL (error in label)
eisteddfodau
emerize
Emperor of Rome
family Entomophthoraceae
flexibilization
grab ahold of
graphinos
hard-surface mask
high strength alloy steel shackle
hydraulic cushion guardrail
hydrodiascope
inner register
institutionary
lachin
ladyfish
lecture-room
made money
make an invasion upon
manzy
marsformoxid
meat infusion bouillon
meat loaf
meat mixer
megacanthopore
Meliosma subverticillaris
methanobactins
Mitchell's hopping mouse
molar heat of vaporization
N-trifluoroacetyl
Nyakakiri
organic bipolarity
painter's brush
penny wheep
Petit truss
physiologic dwarf
Pippu
prelateral plate
pressure sensitivity of microphone
propre vice
pteleorrhine
reflection-on-action
refractory patching cement
repairman
retiarius
ritzi
rocks you
Roger I
Salsola passerina
secondary compartment line
seed stem
self retaining catheter
self-maintained push-button
serial by bit
Sirrah, Nafūd as
socialist leglity
somagrebove
stannous fluoboric acid
Stephens, Alexander Hamilton
stillinger
subcapsular sinuses
suspend production
tabless
terpstra
thin layer electrophoresis
tidal double ebb
Tiffeneau conversion
treeshrews
trelfords
underwounds
unit equipment record
United States of America Standards Institute
valedictory speaker
valerienic acid
variable length word symbolic assembly system
voerflow alarm
worthlesser
zdj