1 . How to Care for Your Tree

1. Water the newly planted tree. Once the tree is planted, water it and keep up a _________ schedule of watering.

Water the tree every day for several weeks to let the _________ get established in the surrounding soil. After this you can reduce the frequency of watering.

Water as necessary for the conditions in your area. _________ humidity into consideration to help you decide _________ to water your tree.

If you are planting fruit or nut trees for a small home orchard, continue to water weekly for the _________of the tree, as your crop depends on consistent irrigation. You’ll also want to fertilize fruit and nut trees monthly, or _________ package directions.

2. Use mulch (覆盖物). Considering adding a layer of mulch _________ your tree to help keep moisture in and weeds out.

Cover the planting hole with 1-3 inches of shredded hardwood or leaf mulch. Keep the mulch at least 12 inches away from the trunk _________ it may cause the trunk to rot.

Mulching around the tree will _________ the tree from trampling and lawnmowers, __________ are two activities that commonly kill young trees.

3. Prune the tree if necessary. If there are any broken, dead, or diseased limbs on your tree,   __________ them gently with knife. If there is nothing wrong with the tree, there is no need to prune it until after the first growing season.

4. Enjoy the tree as it grows over the years. Appreciate its __________ and beauty and thank yourself for adding another tree to the world. You won’t regret it and __________ you properly care for it, the tree can grow long time!

You’ll need to make sure that you water your plant to keep it thriving. You want to achieve __________ of giving it enough water to penetrate (穿透) the roots while not drowning it.

Watering your tree with a steady stream from a garden hose for about 30 seconds should be sufficient. The soil should feel moist at all times and mulch will help retain the moisture.

Check soil moisture by digging about 2 inches below the surface and then use your __________ to test if the soil is moist. If it is, you don’t need to water.

2 . At first, the grains of rice that Ingo Potrykus held in his fingers did not seem at all _________, but inside, these grains were not white, as ordinary rice is, but a very pale yellow — thanks to beta-carotene (胡萝卜素), a building block for vitamin A.

For more than a decade Potrykus had _________ creating a golden rice that could improve the lives of millions of the poorest people in the world, strengthening their eyesight and their _________ disease.

_________ imagining golden rice was one thing and creating one quite another. Year after year, Potrykus and his colleagues ran into one _________ after another until success finally came in the spring of 1999.

At that point, he tackled an even greater challenge. The golden grains _________ pieces of DNA borrowed from bacteria and flowers. It was what some would call Frankenfood, a product of genetic engineering. As such, it _________ a web of hopes and fears.

The debate began the moment genetically engineered crops (GM crops) were first sold in the 1990s, and it has _________ ever since. First to start major protests against biotechnology were European environmentalists and consumer-advocacy groups. They were soon followed by their U.S. counterparts (相对应的人事物).

The hostility is _________. Most of the GM crops __________ so far have been developed to produce a plant that is not harmed by chemicals used to kill weeds (杂草) in the fields. These genetically engineered crops are often sold by the same large, multinational corporations that __________ the weed-killing chemicals that farmers spray on their fields. Consumers have become suspicious (怀疑的).

The benefits did seem small __________ golden rice was developed. It is the first strong example of a GM crop that may __________ not just the farmers who grow it but also the consumers who eat it. In this case, those include at least a million children who die every year because they are weakened by vitamin-A deficiency (缺乏) and an additional 350,000 who go blind.

Many people __________ poverty and hunger look at golden rice and see it as evidence that GM crops can be made to serve the greater public good. They see a critical role for GM crops in feeding the world’s ever-increasing population. As former U.S. President Jimmy Carter put it, “Responsible biotechnology is not the enemy; __________ is.”