男女羞羞视频在线观看,国产精品黄色免费,麻豆91在线视频,美女被羞羞免费软件下载,国产的一级片,亚洲熟色妇,天天操夜夜摸,一区二区三区在线电影
您現在的位置: Language Tips> Audio & Video> Special Speed News  
 





 
Giving grasslands a rest
[ 2008-01-15 09:59 ]

 

 

Download

This is the VOA Special English Agriculture Report.

Grasslands need time to rest when cattle and other animals feed on them. Moving animals from one area of pasture to another can provide the time needed for new growth. This is called rotational grazing, and we have a question from listener Zhang Guohui in China about how it works.

Experts say rotational grazing is good for the land and the animals, and it can save money. This form of grazing can reduce the need for pesticide chemicals by reducing the growth of weeds. And it can limit the need for chemical fertilizers by letting natural fertilizer, animal droppings, do the job. Rotational grazing can even help prevent wildfires by keeping grasslands in good condition.

Letting animals feed continually and intensively in the same grazing areas can require costly replanting. Animals eat the most desirable growth first. When that keeps happening, the roots do not have enough time to recover. As a result, less desirable plants may replace them.

Intensively used grasslands are also harmed as the soil is continually crushed under the weight of heavy animals. And the animals usually avoid their own waste, so that reduces the amount of good grazing space even more.

Experts say that while rotational grazing can save money over time, it also requires planning. And that starts with a good map to mark fences, water supplies and grazing areas.

Changing methods of grazing also requires time. Farmers may want to put up electric fences to enclose grazing areas, called paddocks. The paddocks will need water. Some farmers design a path for animals from different paddocks to drink from a common watering place.

Farmers can start rotational grazing by removing animals from a pasture when the grass is eaten to less than five centimeters. The pasture is then kept empty until the grass grows to more than fifteen centimeters high.

Experts say sheep and goats may require special preparations. They may need stronger fences than other animals. And while they eat the grass, they may need guard animals like llamas to protect them from animals that would like to eat them.

And that’s the VOA Special English Agriculture Report, written by Jerilyn Watson. Transcripts and MP3s of our reports are at voaspecialenglish.com. And if you have a question, we might be able to answer it on our program. Write to special@voanews.com and please include your name and country. I’m Steve Ember.

rotational grazing:輪牧

(Source: VOA 英語點津姍姍編輯)

 
 
相關文章 Related Stories
 

 

 

 
 

本頻道最新推薦

     
  Giving grasslands a rest
  Automakers show off green, fuel efficient vehicles
  Dog fashions hit Japan
  Nicknames: America's 50 states(second)
  New Hampshire primary leaves presidential race wide open

論壇熱貼

     
  pee park
  狗不理的英文招牌很可能成為新的國際笑話
  to my 2007
  《康定情歌》有誰可以譯出韻味來?
  被宰了
  破罐子破摔




主站蜘蛛池模板: 和硕县| 涞源县| 怀柔区| 汝州市| 大足县| 贞丰县| 武城县| 神农架林区| 张家川| 崇阳县| 安多县| 富川| 吐鲁番市| 怀安县| 应用必备| 剑阁县| 灵武市| 青海省| 陇西县| 台北市| 永嘉县| 梓潼县| 普兰店市| 道孚县| 望城县| 梓潼县| 昔阳县| 滨海县| 长乐市| 云安县| 余干县| 麻城市| 滁州市| 临西县| 济宁市| 含山县| 延安市| 安溪县| 靖宇县| 辛集市| 会理县| 克东县| 惠州市| 天气| 天镇县| 东平县| 同江市| 都昌县| 山东省| 鹰潭市| 通江县| 淮滨县| 岑巩县| 化州市| 铅山县| 平顺县| 洛川县| 泰宁县| 曲周县| 信阳市| 云龙县| 上思县| 汤阴县| 临高县| 灌阳县| 巧家县| 木里| 会宁县| 连江县| 五寨县| 竹山县| 康保县| 军事| 恭城| 怀来县| 噶尔县| 安图县| 疏勒县| 西华县| 大荔县| 大新县| 息烽县|