时间:2018-12-07 作者:英语课 分类:农业与发展


英语课

AGRICULTURE REPORT -January 8, 2002: Composting


By Gary Garriott
This is the VOA Special English AGRICULTURE REPORT.


Many farmers around the world are composting to improve their soil so they can produce better crops.
Composting is the mixing of plant or animal wastes so they break down and produce simpler substances.


Farmers add compost to their soils instead of burning the plant and animal wastes or throwing them away.
Compost is an example of a natural organic fertilizer. Organic fertilizers help to make soils rich so that they
produce more crops for a longer time.


During the growing season, plants take gases from the air such as carbon, hydrogen and oxygen. They combine
these gases with minerals from the soil.


After the growing season ends, many parts of the plant die. Farmers gather a large amount of dead plant materials
into small hills called compost piles. They may add animal wastes. They must add water so the materials will
break down or decay 1.


Soon the plants are attacked by insects and organisms including worms and bacteria. Oxygen helps the organisms
change the plant materials more rapidly. The plants decay into a mixture that can be spread on the farmland
where the crops are growing. The compost returns needed nutrients 2 to the soil.


Some rules need to be followed to produce the best quality compost. Good compost piles need water to speed the
process of decay. Yet the piles should not be too wet or the plant material will be ruined. The temperature of the
compost pile should not be too high or too low. The best temperature for a compost pile is about thirty to thirty-
seven degrees Celsius 3. You can turn the pile over and over to help cool down the material. Turning the compost
pile over adds more oxygen to the mixture which helps it decay.


Sometimes small animals such as rats and mice like to eat the composting materials. This can be prevented if you
add a thin amount of soil to the top of the compost pile.


Farmers who use compost can increase the amount and quality of their crops. Computer users can find more
information about composting from Volunteers in Technical Assistance or VITA.


VITA is an organization based in the United States that helps people around the world use science and
technology to solve problems. VITA’s Internet address is w-w-w dot v-i-t-a dot o-r-g.


This VOA Special English Agriculture Report was written by Gary Garriott.



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1 decay
vi.腐烂,衰落;n.腐烂,腐朽,衰败状态
  • The vegetables have begun to decay.那些蔬菜已开始腐烂。
  • Our powers decay in old age.我们的体力在老年时就衰退。
2 nutrients
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》
3 Celsius
adj.摄氏温度计的,摄氏的
  • The temperature tonight will fall to seven degrees Celsius.今晚气温将下降到七摄氏度。
  • The maximum temperature in July may be 36 degrees Celsius.七月份最高温度可能达到36摄氏度。
学英语单词
abdumalik
alalic
altheas
amandla
ambassadeur
annunciator window
be low in one's pocket
biological fathers
Bis-2-Ethyl-Hexyl-Phthalate
bolshakov
bottle thermometre
burst-energy-recovery efficiency
capulins
carpet wire
cementation belt joint (glued belt joint)
centre of friction
changseung
clay blocking
college role
commercial-bank
complex normed space
control computer subsystem
dark orange
Davis, Jefferson
diadromy
dipropyl barbituric acid
dream-stick
driven shaft bearing cup
effervescence, effervescency
elevater bucket
enolate ion
ensmall
epigrammatised
evidence generator
extromit
family Rhizopogonaceae
ferrite core
fiddled around
Fimbristylis nanningensis
first palatalization
fluminose
fluorescence quartz glass
FOA
forward-reverses
fourfold axis of symmetry
Fuso Black Body
hafod
high resolution detector
high-velocity forming die
horizontal linearity
Imbros
indicated pressure altitude
initial volcanic stage
Jill
jumboising
landscaped
lean finely textured beef
light beats
liko
maca root
make-hawk
MAR (minimum acceptability requirement)
measurable transformation group
molossuses
monostromatic
Mysore(Maisur)
orangites
osmoregulated
overtold
papilla nervi optici
parently
pealius rhododendri
piezoelectric composite
pleural nerve cord
post cover
provisional pharter
radio ID
rape suspects
raw rubber
red green blue
reteplase
Rs.
salified
seeing the light
Sialor
side gate holder
silk mercer
St-Martin-du-Mont
steel pick head
take a bow
talinum katens willd
tetraacetylglucose
thas
the millennium bug
therapeutic index
thymelike
transportable missile-tracking radar
unbounded spectral operators
universes
valuenow
young and innocent