VOA慢速英语 种生菜 其乐无穷
This is the VOA Special English Agriculture Report.
Even in ancient times, people liked to eat lettuce. Egyptians and Romans served the green, leafyvegetable at the end of dinner.
Now, people in some countries start the meal with lettuce as part of a salad. There are hundreds of kinds of lettuce. The main ones include head lettuce, such as iceberg, leaf lettuce, Boston, bibb and romaine.
Experts say lettuce is one of the easiest crops to grow in your garden. The best time to plant the seeds is during cool weather. The University of Illinois Extension advises that the best planting temperature is fifteen degrees Celsius.
Lettuce seeds are small, so do not place them too deep in the ground. If you plant some seeds every week or two, you will have crops ready to eat one after another.
To start the seeds inside, you can use a seed tray in your home or other shelter. This container should be deep enough to hold at least three centimeters of soil or more. There should be about one centimeter of space between the soil and the top of the container. The container should have holes in the bottom so the extra water can flow out.
- VOA慢速英语 一个为世界带来光明的医疗组织
- VOA慢速英语 在美国如何写论文
- VOA慢速英语 在社区学院免费就读一年
- VOA慢速英语 种生菜 其乐无穷
- VOA慢速英语 游历十大即将消失的旅游胜地
- VOA慢速英语 废奴运动中堪萨斯州采取措施改变状况
- VOA慢速英语 美国墨西哥全力以赴对抗猪流感
- VOA慢速英语 哈勃改变了我们对宇宙的概念
- VOA慢速英语 骨质疏松症增加骨折风险
- VOA慢速英语 七位环保先锋获得戈德曼环境奖