Прочитайте текст. Many different groups of organisms attack plants parasitically. Nematode worms of ...: ответ на тест 1072273 - Английский язык

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Many different groups of organisms attack plants parasitically. Nematode worms of microscopic size often invade plants, and living parasitically therein, cause serious disease in roots, tubers, bulbs, stems, and leaves. Highly infectious diseases of the virus type are now recognized to be among the most serious that affect plants; they are often transmitted by insects. The fungi include an immense number of forms parasitic on plants which are often extremely injurious. The diseases most to be feared are those which are epidemic in character, i.e. those which develop almost simultaneously and universally throughout a crop.
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Highly infectious diseases of the virus type are often transmitted …

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Prevention of disease is a major concern of livestock raisers. Some diseases can 1_______ large numbers of livestock or be transmitted to people. The chief causes of livestock 2_______ include bacteria, fungi, parasites, and viruses. Livestock also can become ill if they consume 3_______ poisons or insecticides and certain other chemicals sprayed on grass and plants. 4_______ inherit sensitivity to some diseases.

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A decisive factor for securing yields is the protection of agricultural crops. Day by day cultivated plants and supplies in store rooms are threatened by thousands of pests and disease pathogens. Every year millions of tons of produce are lost and plants and animals are retarded in growth and development or the products derived from these organisms are affected both quantitatively and qualitatively. Control of these pests must become the greatest task for all scientists, technical engineers and farmers responsible for the production of agricultural products.
What is meant by a pest or a disease pathogen? They are animal or plant organisms which damage either cultivated plants or the products derived there from. They directly or indirectly influence the health of a man and domestic and useful animals.
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Control of the pests must become the greatest task for all scientists, technical engineers and farmers responsible for …

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Nearly all the field crops grown on the farms are planted by machines called planters or drills. These machines cut furrows in the soil, drop seeds into each furrow, and cover the seeds with soil – all in one operation. Some fertilizers and pesticides are applied to the soil during planting. Equipment to distribute the chemicals may be attached to the seed drill. Herbicides applied before or during planting kill many kinds of weeds, but not all. Some weeds may develop with the crops. Farmers control such weeds with cultivators. These devices stir the soil between rows and so uproot and bury any weeds.
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Some fertilizers and pesticides are …

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The Roman Empire began as a country of small farms on the Italian peninsula before 500 B.C. By the A.D. 200s the Romans had developed new farming methods, e.g. systems of crop rotation. The selective breeding of plants and livestock began in Europe during Roman times, too. During the Middle Ages European farmers invented a three-field system of crop rotation during the Middle Ages. In many areas, it replaced the Roman two-field system. On most European farms horses gradually replaced oxen as the chief source of power. Many special-purpose livestock breeds were developed.
The European voyages of discovery that began in the 1400s greatly affected agriculture throughout the world. In various parts of the Americas, Indian farmers grew cocoa beans, corn, peanuts, peppers, rubber trees, sweet potatoes, tobacco, and tomatoes.
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On most European farms horses gradually replaced …

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22 May, 2011
1_______,
It was distressing to learn that the butter we shipped to your firm last week arrived in bits. 2_______, a new shipment for 30$ left our dock this morning and is scheduled for afternoon delivery to you on May 26th. Please turn over the damaged goods to the driver at the time of deliver.
3_______ that this unfortunate incident occurred and sincerely appreciate your continued patronage.
4_______,
Mr Norman