Feeding systems for livestock farms

Mechanical feeding systems are becoming increasingly important in livestock farming. For a long time farmers have enjoyed the use of low-cost power and machinery in crop production, but until very recent years feeding has been an unmechanized and inefficient operation.

The present avail­ability and convenience of electric power at low cost makes it possible for every farm to eliminate shovel and basket feeding in favor of electrical and mechanical feeding systems. Such developments not only increase the individual farmer's output per man/hour, but change his role of a manual laborer.

Feeding systems consist usually of conveyors which carry the food from a bulk supply point into the house. The conveyors may be augers, chain-and-f light types or pneumatic pipe systems. Small motors from fractional horse power to 3 hp are necessary. Control is usually by a time switch.

A mechanical feeding system uses the energy of a machine to do work that was formerly done by human muscle power. An automatic feeding system supplies controls to machines so that they may function by themselves.

A mechanical feeding system, to be ideal, should indeed be completely automatic, that is, it should be set up so as to enable feed and supplements to move from storages to the feed bunk without any manual attention from the livestock operator. Such an ideal system - where grinders, blenders, conveyors, and distributors are per­fectly coordinated so that no manual attention is necessary - is sometimes unattainable, but should always be considered the goal when planning mechanical systems.

ВАРИАНТ 3.

I. Перепишите следующие предложения; подчеркните в каждом из них глагол-сказуемое и определите его видовременную форму и залог. Переведите предложения на русский язык. В разделе (б) обратите внимание на перевод пассивных конструкций.

а) 1. It is the car that will be the transport of the future.

2. Scientists have found ways of measuring the sizes and masses of bodies.

6) 1. Elements are transformed into other elements both by man and by nature.

2. The report will be improved by him by changing the end.

II. Перепишите следующие предложения; подчеркните Participle I и Participle II и установите функции каждого из них, т.е. укажите, является ли оно определением, обстоя­тельством или частью глагола-сказуемого. Переведите пре­дложения на русский язык.

1. He heard the voices coming through the open window.

2. A balsa tree found in South America is lighter than any other.

3. Soils containing too much sand or clay are of less value in agriculture.

4. When studying elements Mendeleyev found that they were divided into nine groups.

III. Перепишите следующие предложения; подчеркни­те в каждом из них модальный глагол или его эквивален­ты. Переведите предложения на русский язык.

1. She can tell you everything about cattle.

2. The application of digital (цифровой) computers should include all forms of automatic control in science and industry.

3. He had much work to do yesterday.

4. The team of experts is to study the present situation in agriculture.

IV. Перепишите и письменно переведите текст.

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