日韩精品久久一区二区三区_亚洲色图p_亚洲综合在线最大成人_国产中出在线观看_日韩免费_亚洲综合在线一区

您現(xiàn)在的位置: > Language Tips > Audio & Video > Special Speed News  
 





  Bird flu: composting the remains of farm birds
[ 2006-03-06 14:20 ]

I'm Steve Ember with the VOA Special English Agriculture Report.

Farmers usually have to destroy all of their chickens and other birds if a case of bird flu is found. Then they face another difficult decision: What to do with the remains?

Some farmers choose composting. They avoid the danger of transporting infected birds, the cost of burning them and the risk that burial could pollute ground water.

Composting uses the natural action of microorganisms to break down organic materials. Many agricultural extension services explain ways to compost animal remains.

Composting must be carefully controlled. The balance of carbon and nitrogen is very important. A correct nutrient balance requires extra material like dry grass or pieces of wood. These materials are called bulking agents.

Also, the compost must hold the right amount of water. Too little, and bacteria cannot do their job; too much, and air will not reach all the compost. The mixture should reach temperatures between fifty-seven and about sixty-three degrees Celsius.

If the pile begins to smell bad, this could be a sign that ammonia is building up. Adding the chemical ferrous sulfate can help solve this problem.

Experts say a simple way to compost farm birds is to create a windrow. A windrow is simply a mass of material. It should be three to four meters wide and about two meters high. It can be as long as space permits.

A windrow this size should contain three levels of birds, placed between layers of bulking agent.

Windrows should not be near homes, animal shelters or water resources.

Experts say one thousand birds weighing a little over one kilogram each would need about ten cubic meters of bulking material. The material should be placed loosely so air can pass through it.

The windrow should take about one week to reach a high temperature. After another week to ten days, the temperature will begin to drop. At this point, the windrow must be turned.

Turn all the material completely. If it is too dry, add water. If it is too wet, add more bulking agent. Completely bury any bird remains that might be uncovered.

Experts say that after about three to four weeks more, the compost should be ready to use as fertilizer.

This VOA Special English Agriculture Report was written by Mario Ritter. Read and hear our reports at voaspecialenglish.com. We also have a link to detailed information from the University of Maryland on composting poultry. I'm Steve Ember.


Vocabulary:

 

 
 
 




主站蜘蛛池模板: 精品免费在线 | 久久精品一区二区国产 | 成人国产精品免费 | 日韩欧美视频免费观看 | 日本久久精品免视看国产成人 | 欧美线人一区二区三区 | jizz日本护士 | 婷婷色在线 | 高清视频一区 | 国内精品视频在线观看 | 成a人v在线观看视频 | 精品96久久久久久中文字幕无 | 国产精品久久久久久久7电影 | 亚洲毛片无码专区亚洲A片 日本高清www午色夜黄 | 国产亚洲欧美在线人成aaaa | 九草视频在线 | 香港论理午夜电影网 | 精品欧美一区二区在线观看 | 日韩免费精品一级毛片 | 国产亚洲精品久久久极品美女 | 伊人国产精品 | 久久国产精品99久久久久久牛牛 | 丁香婷婷色综合亚洲小说 | 精品久久一区二区 | 另类国产ts人妖高潮系列视频 | 国产亚洲一区二区三区在线观看 | 午夜久久久久久网站 | 久久久久久久久久爱 | 欧美在线观看a | 国产午夜免费福利 | 亚洲色图偷拍视频 | 成年男女男免费视频网站不卡 | 久久99精品视频 | 精品欧美视频 | 日韩欧美国内 | 亚洲自拍另类 | 国产成人精品免高潮在线观看 | 国产精品久久久久国产A级 首页亚洲国产丝袜长腿综合 | 亚洲精品午夜一区二区 | 亚洲一区二区三区欧美 | 国产精品视频久久久 |