• [英语听力] 互补栽培植物(2)

    Hints: CaliforniaEven after harvest, some kinds of produce should be kept apart. Apples, for example, release ethylene gas, a plant hormone. It can cause other foods to ripen too quickly. Fruits...

    2009-08-09 00:00
  • [英语听力] 互补栽培植物(2)

    Hints: CaliforniaEven after harvest, some kinds of produce should be kept apart. Apples, for example, release ethylene gas, a plant hormone. It can cause other foods to ripen too quickly. Frui

    2009-08-09 00:00
  • [英语听力] 互补栽培植物(1)

    套作的作物对养分,土壤和湿度有大体相同的需求。Hints:Fabian Fernandez the University of Illinois Companion planting is the idea that when some crops are planted together, they help each other grow...

    2009-08-08 00:00
  • [英语听力] 平衡使用肥料(1)

    Hints: Sub-Saharan Africa Cornell University in IthacaLaurie DrinkwaterThe researchers say farming methods in Sub-Saharan Africa need to improve or else poor quality soil will increase rural pove...

    2009-08-01 00:00
  • [英语听力] 平衡使用肥料(1)

    在不同的国家,肥料的使用都不尽相同,有的太多,有的太少。Hints: Kenya nitrogen phosphorusFertilizer use differs from country to country, and from too little to too much. Nitrogen and phosphorus ca...

    2009-07-31 00:00
  • [英语听力] 葡萄园的生态平衡(2)

    用小羔羊的费用远远低于夏季的七个星期雇工修剪的费用。Mr. Johnson says the young lambs are perfectly designed to do the job. They eat the grape leaves on the lower parts of the vine. But they are n...

    2009-07-18 00:00
  • [英语听力] 葡萄园的生态平衡(1)

    葡萄种植主们使用自然、有机的方法来替代化学药物的使用,以便于控制有害的昆虫和物种的侵袭。Hints: Featherstone Winery Ontario David Johnson New Zealand Growers around the world are using new method...

    2009-07-17 00:00
  • [英语听力] 美国学生将蜂蜜工程引入加纳(1)

    一些来自佛罗里达的美国学生将养蜂业带给了加纳一个社区的农民,并称为“蜂蜜工程”,Hints: Ghana Florida Agogo Nathan BurrellSome American students from Florida are bringing the business of beekeep...

    2009-07-03 00:00
  • [英语听力] 让机器人帮你挤牛奶 (1)

    科技正在使一些牛奶场主的生活变得更加轻松。今天一起看下他们用机器人系统来挤奶。Technology is making life easier for some dairy farmers. They use robotic systems to milk their cows. These systems a...

    2009-05-13 00:00
  • [英语听力] 热门课题:种植红辣椒 (2)

    今天我们继续来研究一下如何种植红辣椒。需要怎样的条件呢?Then cover the top of the pot with a see-through plastic bag. Hold the bag in place with a rubber band. Place the pot in a warm area. When ...

    2009-04-28 00:00