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11. Translate into Russian paying attention to the meanings of the following words: as to, for, extent.

  1. As to the value of this fiber crop it is well known to everybody.

  2. We value this crop for its fiber.

  3. The roots of cereals extend in all directions from the nodes of the stem, their extent may be very great.

  4. As to annual crops they complete their life cycle in one season.

  5. The yield of this crop depends to a considerable extent upon the environmental conditions.

  6. The length of the vegetative season changes to a great extent with the temperature.

12. Translate the sentences into Russian.

  1. Temperature is one of the most important environmental factors affecting crop growing.

  2. Botanical classification is one based on the similarity of plant parts.

  3. One can group plants according to the duration of their growth.

  4. Perennial crops are the ones that grow for more than two years.

  5. One should know the crops belonging to grass family.

  6. They use traditional cultural practices in corn production but we use improved ones and obtain better results.

  7. Most of our field crops belong to one of the two botanical families: the grasses and the legumes.

8. Annual crops are those that complete their life cycle in one season.

13.Find in the text the English sentences equivalentto the Russian sentences.

1. Цель классификации полевых культур – сгруппировать их либо согласно специфике их роста, либо согласно их использованию.

2.Согласно специфике их роста полевые культуры классифицируются как однолетние, двулетние и многолетние.

3.Образ жизни картофеля совершенно отличается от корнеплода.

4.Согласно применению полевые культуры классифицируются как злаки, бобовые, корнеплоды, кормовые культуры, волокнистые культуры и клубни.

5.Корнеплоды выращивают из-за пищевой ценности их корней.

6.Злаки включают кукурузу, пшеницу, овес, ячмень и рис.

7. Наиболее важным клубнем, возделываемым во всем мире, является картофель.

14. Say it in English:

1. name all the crops used by man for food;

2. name some fiber crops and say what they are used for;

3. principles offield crops classification;

4. what is the difference between root crops and tubers.

15. Answer the questions, make up the plan of the text and retell it.

  1. What is the aim of classification of field crops?

  2. According to what principles are crops classified?

  3. How are field crops classified according to their growth habit?

  4. How are field crops classified according to their use?

  5. What are the main cereals raised by man?

  6. What are legumes grown for?

  7. What is the difference between root crops and tubers?

  8. What are the fiber crops used for?

9. What is a forage crop?

16. Get acquainted with text b and answer the questions.

  1. How may crops be classified?

  2. What is the second principle of grouping crops?

  3. What are annual crops?

  4. What plants are biennials?

  5. How many seasons do perennials grow?

  6. What are the most important and most often used classification of plants?

  7. What is a botanical classification?

  8. What two botanical families do you know?

  9. What crops belong to the grass family?

10.Why are forage grasses important? What are they used for?