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Англійська для студентів-агрономів.doc
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    1. In the second column select the words and the word combinations equivalent to those in the first one.

  1. rock 1. азот

  2. pro­cess of weathering 2. пісчаний грунт

  3. soli­dification of the magma 3. торф

  4. boron 4. залишки рослин

  5. nitrogen 5. выщелачивание

  6. sulphur 6. сірка

  7. fen 7. болото

  8. leaching 8. калій

  9. parent material 9. бор

  10. plant remains 10. тверднення магми

  11. sandy soil 11. процес вивітрювання

  12. peats 12. скельный грунт

  13. potassium 13. материнська порода

    1. Label this diagram to illustrate the passage devoted to the soil formation.

Soli­dification of the magma

Mixture of organic and inorganic material

S O I L

    1. Find the words in the text, which correspond to the following definitions.

    1. … main horizons, which consists of the parent material, e.g. the partly disintegrated rock.

    2. … main horizons, from which material has been removed by leaching.

    3. … main horizons, in which has been de­posited some of the material removed from the uppermost horizon.

    1. Complete each sentence with a word or phrase from the box.

1. are usually added as farm manure and as com­mercial fertilizers.

2. as the primary elements.

  1. …as farm manure, superphos­phate, and sulphate of ammonia.

  2. …to be obtained from the soil by plants in relatively large quantities.

  3. …to be used by higher plants in very small amounts. They are called trace or microelements.

  4. …because of primary elements lacking in the soil.

  1. Nitrogen, phosphorus, potassium, calcium, magnesium and sulphur are known

  2. Iron, manganese, copper, zinc and boron are known

  3. Being artificially applied to the soil nitrogen, phosphorus, and potassium

  4. Sulphur is known to be an incidental ingredient of such fertilizers

  5. It is known that plant growth may be retarded

  6. The microelements are as important for plant growth

    1. Translate the text paying attention to the different meanings of ing-forms:

1.Soil is produced from rock by weathering. 2. Plants establish themselves very soon after weathering begins. 3. Having decayed plants form an addition to the products of rock weathering. 4. Sizes of mineral crystals depend upon the rate at which cooling took place. 5. Each mineral is a chemi­cal compound having specific chemical and physical proper­ties. 6. Igneous rocks having been exposed to changing tem­peratures, moisture, etc., slow processes of disintegration and decomposition begin.

Grammar exercises

I. Transfer the sentences from Active into Passive.

Model: The pro­cess of weathering and the activities of plants, animals, and man produce the soil from rock.

Soil is produced from rock by the pro­cess of weathering and by the activities of plants, animals, and man.

1. The soli­dification of the magma forms primitive or igneous rocks in the process of the cooling of the earth. 2. A coarse­-grained sandstone will generally produce a sandy soil, and a stratum of shale a "heavy" soil. 3. Soil scientists distinguish three main horizons. 4. Particles and fragments of mineral matter constitute typical soils.