TIẾNG ANH CHUYÊN NGÀNH NÔNG NGHIỆP – PHẦN 3

38 3. After being absorbed it is radiated back into the atmosphere as heat energy or turned into chemical energy by green plants when they photosynthesize. 4. Fertilizers are added to soil to replace nutrients that have been used by previous crops, blown away or leached (washed away) into the subsoil by rain or irrigation. 5. If the soil is gritty it will drain and dry out quickly. 6. When the soil particles are mainly sand and coarse gravel its texture is said to be gritty. 7. If the soil is silky it will drain slowly and hold water for a longer time. 8. Artificial fertilizers need to be soluble compounds so that plants can absorb the nutrients. 9. This means they continue to exist unchanged in the soil because they cannot move into one of the cycles of matter. B. Word formation. There are many English words derived from other words with different prefixes or suffixes such as: -ment; -ation; -ion; -ance; -al; -ent; -able; -ly; -en; -er; -or; -ist; en- . . . 1. Find out the words with these suffixes or prefixes in the passage. Verb – Noun: -ment - development - ……………………….. -……………………….. -……………………….. Verb – Noun: -ation (-ion) -information - production -……………………….. -……………………….. -……………………….. Verb – Noun: er (-or) -farmer -……………………….. -……………………….. -………………………… Noun - Noun -biologist -………………………….. -…………………………. -…………………………. Verb – Adjective: -ent -different -……………………….. -……………………….. -……………………….. Noun – Adjective: -able (-eble) -reasonable -……………………….. -……………………….. -……………………….. Noun – Adjective: -al -national -……………………….. -……………………….. -……………………….. Noun – Adjective: -y (ly) -rainy -……………………….. -……………………….. -………………………… Adjective – Verb: -en -widen -……………………….. -……………………….. -……………………….. Adjective – Verb: -ize -modernize -……………………….. -……………………….. -……………………….. Adjective – Verb:En- -enrich -……………………….. -……………………….. -……………………….. Adjective – Adverb: -ly -quickly ..…………….. -……………………….. -……………………….. -………………………. 2. Words derived from other words with prefixes such as: un-; in-; dis-; pre-; re-; de; en... Find the words with these prefixes in the passage. unfair; incorrect; distribute; rebuild. . . - .................................................................................................................................. - ................................................................................................................................. - ................................................................................................................................. - ................................................................................................................................. - ……………………………………………………………………………………….. - ……………………………………………………………………………………….. - ……………………………………………………………………………………….. III. READING A. 1. Pre-reading task. Read the passage and find the answer to the following. a. What is climate? b. What is the difference between climate and weather? c. Is climate predictable? (can people predict climate?) 39 CLIMATE Climate is the primary determinant of vegetation. Worldwide, different climates are affected by precipitation, radiation and wind acting on the huge continental landmasses and ocean currents. When you understand and appreciate the workings of these wild energies you can design ecosystems which: - modify climatic extremes; - reduce failures of crops and animals caused by climatic extremes; - provide greater energy efficiency. 1. Precipitation Precipitation is rain, snow, fog, sleet, hail and frost. These forms of precipitation undergo two main processes which permaculturists use to their advantage: condensation and evaporation. Knowledge of these processes is used to: - design structures for good temperature control; - select appropriate technologies for heating and cooling; - retain water in soil and in dams. Generally, by understanding patterns of precipitation you can plan your growing calendar to take advantage of favorable conditions, and minimize the impact of unfavorable conditions. For example, it is useful to be able to predict the likelihood of drought and to plan accordingly designing water harvesting and storage systems. 2. Wind Wind is caused by the earth‟s rotation and the differential heating of land and sea. For example, hot air rising from the deserts draws in cooler, moist air from the oceans, bringing rain as it moves in. Like precipitation, world climates have fairly predictable wind patterns (although these seem to be changing with global warming). An understanding of these patterns will help you to: - harvest wind energy for electricity; - design houses which take advantage, or minimize the impact of wind; - plant windbreaks to provide protection for plants and animals. 3. Radiation Most radiation comes from the sun as light energy. This energy can be absorbed by water, plants, soils and animals. After being absorbed it is radiated back into the atmosphere as heat energy or turned into chemical energy by green plants when they photosynthesize. Dark bodies absorb the greatest amount of light and later radiate it back as heat. Light-coloured objects and organisms tend to reflect light, which can then be used or absorbed by other plants, water and materials, or sent back into the atmosphere. (Figure 1 shows how a light-reflecting surface can be used to redirect sunlight to brighten a dark room.) 2. Comprehension check. a. Can you determine certain vegetation in the area basing on climate? b. Why are worldwide climates different from each other? c. Why do farmers need to understand the workings of wild energies? d. What are the forms of precipitation? e. How many processes does precipitation undergo? f. What can your understanding patterns of precipitation help you to do? g. What causes wind? h. How does light energy turn into chemical energy? i. What absorbs the greatest amount of light? j. What object reflects light most? 40 3. Fill in the gaps with given words. cause ; which ; blowing ; rainfall ; summer ; seasonal ; moves ; heat ; blows MONSOON Monsoon is the…(1)…wind in South of Asia, especially in the Indian Ocean,…(2)…from the South-west from April to October and from the North-east from October to April. During…(3)…the inland parts of the continent…(4)…the air and create an area of low pressure…(5)…brings in sea air and heavy…(6)… . The combination of this rain with cyclones can…(7)…great destruction. During the winter, cool air…(8)…out from inland areas and dry wind…(9)…towards the coast. Figure 1. Figure 1 shows how a light-reflecting surface can be used to redirect sunlight to brighten a dark room. Light coloured wall Dark room III. Speaking. (group-work of 4) 1. Talking about the using light-reflecting technology above in modern agricultural production. - Producing many kinds of flower; vegetable in any climates. - Creating new species of plant. - Conserving valuable genetic heritages of plant and animal. - Building botanical gardens in different climates. - Raising different breeds of animal in different countries. 41 IV. GRAMMAR. Present or Past participle phrases. - When I wake up and think about the food needed for the day my mind goes to what is growing in the garden - not to what is stashed in the refrigerator. - All the aquatic organisms, including water plants, fish, crustaceans and water birds, are interdependent on each other and their environment through food chains and food webs. 1. Practice. Put the right form of the word in brackets into the blanks. a. Every crop ..................... or animal ..................... to market contains nutrients that were once in the soil. (harvest; send) b. The three most important elements..................... to the soil by fertilizers are nitrogen, phosphorus and potassium. (add) c. This helps the plant to withstand mechanical damage such as..................... branches and torn leaves. (break) d. Government..................... seed is not likely to carry diseases or pests when it is bought. (certify) e. Seed that is bought locally or seed..................... by a farmer for his own use may carry an infection which will quickly spread to the new crop. (produce) f. Ducks eat more and are more efficient scavengers than hens; however they don`t scratch the ground so the..................... work..................... by hens is not available. (cultivate ; do) g. In summer hot air..................... from deserts draws in cooler, moist air from the oceans, ..................... rain as it moves in. (rise ; bring) h. You can design an ecosystem which may increase the..................... season and biodiversity - for example, frosts can be avoided by use of vegetation and structures, or warm breezes ..................... as ...................... . (grow ; redirect ; desire) i. This will affect the type of plants that can be grown and the type of cultivation techniques..................... . (use) j. Bare soil is far more reflective of heat and light compared to...................soil. (cover) k. The world does not have uniform ecosystems because of all the factors..................... upon them. (act) l. Nitrogen is one of the major elements..................for plant and animal growth. (require) m.Nitrogen, one of the main gases in air, is transformed into a soluble form by bacteria ..................... in soil or water. (live) 2. Writing. Rewrite the following sentences using participle construction as example below. Example: * Worldwide, different climates are affected by precipitation, radiation and wind, which are acting on the huge continental landmasses and ocean currents. => Worldwide, different climates are affected by precipitation, radiation and wind acting on the huge continental landmasses and ocean currents. * When you understand and appreciate the workings of these wild energies you can design ecosystems, which reduce failures of crops and animals, which are caused by climatic extremes. => When you understand and appreciate the workings of these wild energies you can design ecosystems, which reduce failures of crops and animals caused by climatic extremes. a. There are many animals living in the soil, which range from microscopic organisms to beetles. => …………………………………………………………………………….. …………………………………………………………………………………………… . b. Soil with good air-water balance and plenty of organic material will have millions of micro-organisms, which assist faster nutrient breakdown and cycling. => .…………… ………………………………………………………………………………………….. . c. Clay soils have minute particles, which give the soil a smooth feel and a silky texture. 42 => ………………………………………………………………………………………. ………………………………………………………………………………………. . d. The methods which are used to repair soil will vary according to the climate and site characteristics. => …………………………………………………………………… ……………………………………………………………………………………..… . e. All legumes are `nitrogen-fixing`. They provide the correct bacterium which is present in the soil. => …………………………………………………………………………… …………………………………………………………………………………………. . f. Often gardeners do this in winter. They use plant species such as rye grass, lupines or barley. => ……………………………………………………………………………. …………………………………………………………………………………………. . g. There are plants which have a bacterium, Rhizobium species. They are living in their roots. => …………………………………………………………………………….. …………………………………………………………………………………………. . h. The small subsistence farm which is run by a farmer primarily to meet personal needs has virtually disappeared from the American scene. => ……………………………… ……………………………………………………………………………... . i. Beef cattle rank as the most valuable product of the nation‟s farms, which are accounting for almost one quarter of total annual farm receipts. => ……………………………… ……………………………………………………………………………… . j. Bill Mollison recommends that people who wish to grow organic foods do not purchase land which has been used to grow bananas, sugar cane or deciduous fruit. => ……….. ……………………………………………………………………………… . k. Gases in the air are exchanged with those that are given off by plant roots and by soil micro-organisms. => …………………………………………………………………. …………………………………………………………………………………………… . l. In soil ethylene cycles with oxygen, which increase the build-up of micro-organisms. => ………………………………………………………………………………………. . m. Hot air which is rising from the deserts draws in cooler, moist air from the oceans, which is bringing rain as it moves in. => ……………………………………………………………………………………………. …………………………………………………………………………………………….. . PARTB I. READING B. 1. Read the passage and answer the following questions. a. What helps to retain nitrate in the soil? b. When is there the most nitrate in the soil? c. Why is the moderate rainfall important for farmers? d. How do farmers plan their growing calendar? e. What do farmers often do to reduce the influence of the climatic extreme on their harvests? f. What is this section about? - microbiological activity in the rainy season. - how wet and dry seasons are important for soil management - the effect of excessive rainfall. TROPICAL CLIMATE The tropical climate, especially the sequence of wet and dry periods, is also an important factor as it affects the availability of nitrogen in the soil. If the soil becomes too dry, microbiological activity drops to a low level and therefore there is a lack of nitrate. After dry ... - tailieumienphi.vn