2009年6月25日星期四

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A natural way to improve soil and reduce pollution.


This is the VOA Special English Agriculture Report.Hp laptop battery


Compost is a dark, rich material added to soil to improve it. Compost is produced when bacteria and fungi break down organic matter, aided by insects, earthworms and other organisms. This natural recycling returns nutrients to the soil. Some experts advise adding 5 centimeters of compost for every fifteen centimeters of turned soil.
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More and more people are making their own compost at home. PP2100, Presario R3000(compaq r3000 battery), Presario X6000, Pavilion ZV5000(hp zv5000 battery), Pavilion ZV6000(hp zv6000 battery),battery
Composting can reduce the amount of garden and cooking waste that would otherwise go into public landfills.

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Monica David from the University of Illinois Extension oversees the master gardeners program in her state. She explains that you can make a compost pile or dig a pit or use a waste container with holes cut in the side.


There are different methods of composting. Some take more work.PP2100, Others take almost no work but may require waiting up to a year.battery


Advice about composting can be found from extension services, at garden centers, in books and on the Internet.


For example, the New York State Department of Environmental Conservation lists some dos and don'ts of composting on its Web site:


Do add lime, small amounts of wood ashes or crushed eggshells to the compost pile. This will neutralize acids which may form and cause a bad smell.


Do mix grass cuttings with other wastes to loosen them up. And do keep the compost pile damp,battery PP2100, Presario R3000(compaq r3000 battery), Presario X6000, Pavilion ZV5000(hp zv5000 battery), Pavilion ZV6000(hp zv6000 battery)
especially during dry periods.

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Do not use unfinished compost. It will rob plants of nitrogen instead of acting as a fertilizer.Presario R3000(compaq r3000 battery),


Do not compost weedy plants with lots of seeds. Some seeds will not be killed during the natural heating process in composting.


Do not add meat, fish bones or fatty food wastes to the compost mixture. Protein materials do not readily decompose and they will bring animals.


And, finally, do not add diseased vegetable plants to the pile if the compost will be used on a vegetable garden. Disease organisms may reappear if you do.


Compost differs from mulch but it can be used as mulch. Mulch is placed on top of soil to protect it. Mulch is generally used to a height of about ten centimeters.Presario X6000, But finer materials such as compost should only be two and a half to seven and a half centimeters high. Too much mulch can restrict oxygen and water flow.

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And that's the VOA Special English Agriculture Report, written by Jerilyn Watson. For composting links, go to voaspecialenglish.com. I'm Bob Doughty.


Related stories:

VOICE TWO:


J. Robert Oppenheimer was born in New York City on April 22nd, 1904. Even as a boy, he showed he had unusual intelligence. As a young man he attended Harvard University, in the eastern United States, and Cambridge University in England.


He earned his doctorate in physics at Gottingen University, Germany, in 1927. There he worked with the famous scientist, Max Born. By 1930, Mister Oppenheimer was teaching at two top universities on the American West Coast. His fame as a teacher spread.PP2100, Presario R3000(compaq r3000 battery), Presario X6000, Pavilion ZV5000(hp zv5000 battery), Pavilion ZV6000(hp zv6000 battery)
Soon he was teaching the best students of physics in the United States.

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VOICE ONE:Pavilion ZV5000(hp zv5000 battery),


In 1942, Mister Oppenheimer joined the American government's project to develop the atomic bomb. He was appointed head of the Los Alamos Laboratory. Many of his former students worked for him on the project.


One year after the bombs were dropped on Japan, he received the Presidential Medal of Merit for his work.battery In 1947, he began to direct the Institute of Advanced Studies at Princeton University on the East Coast.


VOICE TWO:


At the same time, Mister Oppenheimer became chairman of the advisory committee to the United States Atomic Energy Commission. He used the position to try to make the public recognize the dangers of nuclear power as well as its possibilities for good.PP2100, Presario R3000(compaq r3000 battery), Presario X6000, Pavilion ZV5000(hp zv5000 battery), Pavilion ZV6000(hp zv6000 battery)


He regretted that work was being done to develop the hydrogen bomb. He felt it was bad for both scientific and humanitarian reasons. However, Pavilion ZV6000(hp zv6000 battery),extreme tension existed between the United States and the Soviet Union at the time. So in 1949 President Truman decided that work on nuclear weapons should continue.


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