Introduction. How many farm machines can you name right here and now?

How many farm machines can you name right here and now? Not too many, I guess.

And do you know anything about the gradual advancement of these agricultural implements?

On completion of your work with the materials of this Unit, you will boast reasonably sound background in this field.

Exercise 1

Before you start working with the materials of this Unit, study the following words that we have chosen for you from the text.

1) a hoe - мотыга;

2) a plough (a plow) - плуг;

3) tillage - вспашка;

4) machinery - техника (машины);

5) animal power - тягловая сила животных;

6) steam - пар;

7) a chaff-cutter - соломорезка;

8) a root-cutter - корнерезка;

9) a corn-mill - зерновая мельница;

10) a source - источник;

11) available - доступный;

12) to grind - молоть, тонко измельчать;

13) a self-binder - сноповязка;

14) a churn - маслобойка;

15) to shear - стричь.

Exercise 2

Scan the text given below. Noting the facts of agricultural equipment’s development in time, think of the driving force of its progress. We will discuss this problem later in this Unit.

Text 1

From the early ages man tried to cultivate soil using the most elementary method of modifying soil conditions. He broke up the surface and prepared a seed-bed with the most primitive cultivating device, a digging implement - a hoe.

The greatest mechanical advance in the early days of agriculture was the evolution of the plough from the primitive hoe. The use of the plough replaced manual labour by labour of animal power. This is one of the landmarks of agricultural process. It began, thousands years ago, with simple devices for harnessing the power of man himself; then progressed with the construction of implements and machines designed to make use of the greater power of domesticated animals, mostly horses and oxen.

The plough still rests to be the most important tillage tool. It has been changed and improved during the centuries. In the 18^th century there was an attempt to improve agricultural implements. New methods and inventions were applied to farming operations. By the 19^th century a variety of agricultural implements appeared, which were now called “agricultural machinery”. In agriculture, the use of water-power and then of steam greatly stimulated the invention of machinery, replacing manual labour.

A threshing machine was invented in the second half of seventeen hundreds, and productively used in the 19^th century. It was driven by water and wind, sometimes by horse labour, and later by steam.

Later on, in 1860, the internal-combustion engine was invented. It was used to drive stationary machines, as chaff-cutters, root-cutters and corn-mills in the barn. Steam engines, though widely used on the road, suffered the disadvantage in the use on the land. Then the internal-combustion engine was perfected, and agricultural tractors appeared.

But a still newer source of power on the farm is electricity. It was firstly used for lighting. When it became available at low cost, it came into use on the farm.

Agricultural implements are now very numerous. They are subdivided into six groups:

n machinery and equipment movers, i.e. engines of all kinds, tractors, etc.;

n cultivating machinery: ploughs of all sorts, harrows, rollers, cultivators, etc.;

n harvesting machinery, such as mowers, self-binders, threshing machines, combines, elevators, potato-diggers, etc.;

n field supplementary equipment: manure and fertilizer distributers, sprinkling installations, sprayers and many others.

n stationary (or barn) equipment, including such food-preparing machines as chaff-cutters, grinding-mills, root-cutters, manure-scrappers, distributing belts, etc.;

n dairy- machinery, including milking machines, separators, churns, sterilizing machines, etc.

In addition, there is a number of other machines and devices that find intensive use in agricultural production, and sheep-shearing units, rearing chambers, grain conveyers, farm repair shop mechanized equipment, lifting and loading machines being among them.