在线国产一区二区_成人黄色片在线观看_国产成人免费_日韩精品免费在线视频_亚洲精品美女久久_欧美一级免费在线观看

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: 麻豆精品久久 | 久久网页 | 欧美视频一区二区三区 | 中文字幕av高清 | 天堂在线免费视频 | 麻豆一区二区 | 欧美十次 | 中文字幕在线观看 | 国产精品久久一区性色av图片 | 精品一级 | 欧美自拍视频 | 国产高清毛片 | 精品在线一区二区三区 | 国产高清在线观看 | 国产精品二区一区二区aⅴ污介绍 | 成人高清| 一区二区三区在线播放 | 亚洲精品乱码久久久久久9色 | 丁香在线| 国产中文字幕免费在线观看 | 国内精品国产成人国产三级粉色 | 欧美色图亚洲自拍 | 91精品国产一区二区三区蜜臀 | 男人的天堂视频网站 | 亚洲视频免费在线观看 | 99热播在线 | 精品成人国产 | 国产超碰人人爽人人做人人爱 | 99国内精品久久久久久久 | 久久精品 | 2024男人天堂 | 亚洲色图 偷拍自拍 | 亚洲欧洲精品成人久久奇米网 | 国产高清视频在线观看 | 国产高清一区 | 国产精品毛片久久久久久久 | 成人在线视频免费观看 | 一区二区三区四区在线 | 日韩av激情在线观看 | 亚洲欧美日韩国产综合 | 久久亚洲一区二区三区四区五区高 |