VOA慢速英语-Agriculture Report - Much About Mulch
时间：2019-01-11 作者：英语课 分类：VOA慢速英语2008年（七）月
Why mulching is one of the best things to do for plants. Transcript 1 of radio broadcast:
14 July 2008
This is the VOA Special English Agriculture Report.
Mulch is spread in a city park in Atlanta, Georgia
Mulch is important to farmers. Mulch is a protective cover of material that is spread on top of soil. It is usually made out of organic material, like crop wastes. Farmers may keep the remains 2 of maize 3 or other crops on top of the soil. This creates mulch on the soil surface. The plant remains help protect the soil against wind and water damage. This is called conservation tillage.
Mulching is one of the best things people can do for their plants. Mulch not only protects the soil against wind and water damage. It also helps keep the soil from getting dry, and reduces the need for watering plants. It also limits temperature changes in the soil. And it stops unwanted plants, or weeds, from growing.
Organic mulch improves the condition of soil. As the mulch breaks down, it provides material which keeps the soil from getting hard. This improves the growth of roots and increases the movement of water through the soil. It also improves the ability of the soil to hold water. Organic mulch contains nutrients 4 for plants. It also provides a good environment for earthworms and other helpful organisms in the soil.
Finding organic mulch materials can be easy. Small pieces of tree bark and cut up leaves can be used. Grass cuttings are also a good mulch for plants. Using newspapers for mulch also works well in controlling weeds.
The best time to add mulch depends on your goal. Mulch provides a thick barrier between the soil and the air. This helps to reduce temperature changes in the soil. As a result, in the summertime, mulched soil will be cooler than other soil. Mulched areas usually warm up more slowly in the spring and cool down slowly in autumn. In winter, the mulched soil may not freeze as deeply as other soil.
Mulch can be added late in autumn to help moderate the effects of winter weather. The best time is after the ground has frozen but before the coldest weather arrives. Spreading mulch before the ground has frozen may attract small animals searching for a warm place to spend the winter. Delaying the spreading should prevent this problem. The animals will probably find another place to live.
And that's the VOA Special English Agriculture Report, written by George Grow. Transcripts 5, MP3s and podcasts of our reports are at voaspecialenglish.com. I'm Jim Tedder 6.
- A transcript of the tapes was presented as evidence in court.一份录音带的文字本作为证据被呈交法庭。
- They wouldn't let me have a transcript of the interview.他们拒绝给我一份采访的文字整理稿。
- He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
- The remains of the meal were fed to the dog.残羹剩饭喂狗了。
- There's a field planted with maize behind the house.房子后面有一块玉米地。
- We can grow sorghum or maize on this plot.这块地可以种高粱或玉米。
- 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》
- Like mRNA, both tRNA and rRNA are transcripts of chromosomal DNA. tRNA及rRNA同mRNA一样，都是染色体DNA的转录产物。 来自辞典例句
- You can't take the transfer students'exam without your transcripts. 没有成绩证明书，你就不能参加转学考试。 来自辞典例句