Читайте также:
|
(speaking-reading)
2.1. Identify the Passive voice forms in every sentence. Analyze them:
1. Harvesters are widely used in agriculture.
2. Harvesting of cereal crops has been fully mechanized.
3. 3 How can soils be subdivided in accordance with texture and age?
4. Much attention is paid to the problems of unifying standard structure designs and standard details in irrigation.
5. Irrigation projects will be operated from a central office including the river structures for both flood control and for water supply needs.
2.2. Use the following verbs in the forms of Passive voice:
Indefinite tenses: to cause, to determine
Continuous tenses: to apply, to grow
Perfect tenses: to receive, tofertilize
2.3.Translate the following word combinations into English with the help of Passive voice forms. Pay attention to the tense and person of the verb:
Питання розглядаються, увага привертається, гербіциди мають бути розміщені, потрібен дощ, гербіциди мають бути застосовані, невдача була спричинена, як вже було сказано, буде зроблено.
2.4. Ask questions to the sentences:
1. Rye is grown on vast areas in the Crimea
2. The feeding stuffs commonly used on farms can be divided into two main groups.
3. Important selection work is being carried out with dwarf rice in Nigeria, Guinea, Niger and Mali.
4. In Sri Lanka and Malaysia preference is given to improved local varieties of rice.
5. Deep sandy soils are better adapted to rye and some other crops.
2.5. Transform the sentences from Passive into Active voice:
1. The yield of wheat is greatly affected by the amount of moisture in the soil at the time the crop is seeded.
2. If the grain is stored at a high moisture content, it can be damaged by heat.
3. Under the minimum tillage system the plow and the planter are used by the tractor at the same time.
4. Triticale is classified now as a feed grain.
5. Weed control with chemicals is affected by selection, application and environment.
2.6.Transform the sentences from Active into Passive voice:
1. The type of soil also affects herbicide selection.
2. Growers should carefully prepare the machines for the application of the herbicides.
3. Too high rates of chemicals can cause the injury of the growing crop.
4. Strong winds may cause uneven herbicide spraying.
5. Crop rotation controls many weeds.
2.7. Translate the sentences into Ukrainian. Pay attention to the Passive voice tense forms:
1. Fall plowing as soon after harvest as possible is generally recommended for both winter and spring wheat varieties.
2. Seeding was done with one-row hand-operated seeder.
3. The scientists believe that new high-quality protein corn will be commercially produced throughout the world within this decade.
4. Under the minimum tillage system the land has been prepared for planting and planted in two operations.
5. Much of commercial production of triticale is being done on
Step 3
Project Work
(speaking-reading-speaking-writing)
3.1. Skim Text B. Use the following phrases to render the text in English orally:
a) The text deals with the problem of…
b) The major points of the text are the following…
c) The author focuses on…
d) I consider the text to be of some interest for…
Text B. WHY HERBICIDES DON'T ALWAYS WORK
1. Chemical weed control is important in growing many crops to get high yields, but herbicides don't always work. There are some reasons for this.
2. Weed control with chemicals is affected by things that can be arranged into three groups: selection, application and environment1.
3. Selecting the proper chemical to control the weeds that are present is probably one of the most important things. To do this properly one should know specific weed species that are found or are likely to be found in the crop grown. Then one should choose the herbicide or a mixture of herbicides, to control those weeds.
4. Improper application is another common reason for herbicide failure2. Properly working machines for the application of the herbicides, the right rate per acre and good timing are the things that must be paid attention to minimize the possibility of failure.
5. A pre-emergence herbicide must be placed evenly3 on the surface of the soil. For the chemical to move into the germination zone of the weeds, rainfall is required within seven to ten days after application.
6. Some herbicides are volatile4. They must be incorporated5 into the soil just after spraying. If this is not done the herbicide effectiveness will be reduced.
7. Post-emergence herbicides should be applied after the weeds come up.
8. Growers should carefully prepare the machines for the application of the herbicides. If they use some herbicides at a time6, the chemicals must be mixed thoroughly.
9. The right rate of chemical application per acre is also very important. Applying too low rates of the chemical may allow weeds to grow. Too high rates can cause the injury7 of the growing crop.
10. Timing of the application is another factor of herbicide effectiveness. Some must be applied about ten weeks before planting, while others should be applied two weeks before planting.
11. Environmental conditions affecting herbicide effectiveness cannot usually be controlled, but information about them can be helpful.
12. As has already been said rainfall is necessary for the action of pre-emergence surface-applied herbicides.
13. Strong winds may cause uneven herbicide spraying. With volatile herbicides winds and high temperatures may cause a loss of the chemical.
14. Soil structure, moisture and organic matter content also affect the effectiveness of the herbicides.
15. Weed species, stage of growth and life cycle must also be taken into consideration in applying the herbicides. Young weeds, for instance, are easier to control than old ones. Biennial weeds are easier controlled in the rosette stage8 than in the seed-formation stage while perennial weeds are usually controlled in the seedling stage before the extensive root system is developed.
Notes and commentaries:
1environment – навколишнє середовище
2failure – неуспіх, невдача
3evenly – рівномірно
4volatile – летючий
5to incorporate – вносити (добрива)
6at a time -одночасно, за один раз
7injury – шкода, пошкодження
8rosette stage – стадія розетки (розпластане прикореневе листя)
3.2. Annotate Text C in writing:
Дата добавления: 2015-11-14; просмотров: 90 | Нарушение авторских прав
| <== предыдущая страница | | | следующая страница ==> |
| Text C. PLANTS AND THEIR USES | | | Text C. WEEDS |