1. Выучите значение опорных слов:

dent maize – зубовидная кукуруза; flint maize – кремнистая кукуруза; sweet corn – сахарная кукуруза; floury maize – кукуруза крахмалистая; popcorn – кукуруза лопающаяся; to achieve – достигать; to raise soil temperature – повышать температуру почвы; plentiful – обильный; to apply – применять; leaching – выщелачивание; to obtain – добиваться, достигать; emergence – появление всходов; frost – заморозки; to survive – выживать; utilizer and converter – пользователь и преобразователь; solar energy – солнечная энергия; to trap – поглощать; ray –луч; grain maturity – спелость зерна.

2. Составьте из приведенных слов пары синонимов.

retard, growing, crop, inorganic fertilizer, cultivating, delay, seedbed, yield, arable soil, chemical means.

3. Образуйте антонимы от следующих слов, используя нужные префиксы:

to allocate, plentiful, to assist, efficient, particularly.

4. Образуйте существительные от следующих глаголов:

to damage, to suggest, to remove, to cultivate, to obtain, to chance, to grow, to grain.

5. Определите, к какой части речи относятся следующие слова:

several, between, much, ploughing, after, tolerant, optimum, utilizer, particularly.

6. Заполните пропуски соответствующими предлогами.

1. Cultivations kill the weeds … germination.

2. Medium textured soils … maize are preferable.

3. Maize growing can be successful even … alkaline conditions.

7. Заполните пропуски в предложениях соответствующими словами из текста:

1. When there is not enough potassium in the soil, we say the soil is ... in potassium. 2. ... is the process which removes excess of soil moisture. 3. Best yields of maize are achieved on soils of medium ... and high ... . 4. Nitrogen fertilizer should be ... into the soil, otherwise much of it will be lost by ... . 5. Cultivations and ... help to control ... . 6. The average temperature for the ... of maize is over fifty degrees F. 7. The soil should be naturally free draining to … a full rooting system to develop in a … . 8. One should remember that … is much retarded by fertilizers in contact with the … . 9. Under cool conditions seeds … .

8. Определите, какие утверждения не соответствуют содержанию текста, и внесите необходимые исправления:

1. It’s advisable that nitrogen be applied long before plowing. 2. They recommend that maize land should be free draining. 3. It’s necessary that the students know different varieties. 4. It is not desirable that maize be planted in warm soil. 5. Chemical means are seldom used in weed control. 6. To obtain quick germination the seedbed must be fine. 7. Cultivations cannot kill the weeds after germination.

9. Ответьте на следующие вопросы:

1. What types of maize do you know?

2. What are soil requirements for maize growth?

3. Why phosphate and potash should be applied to the land where maize is grown?

4. What conditions are damaging for seeding maize?

5. Explain, why maize is unique in its mode of growth and extent of its leaves?

Грамматические упражнения.