Вопрос № 884617 - Английский язык

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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 main purpose of soil preparation is to make a seedbed – that is, an area of soil in which seeds can be planted and in which they will take root and grow. Most farmers make the seedbed by a process called tillage. Tillage involves digging into the soil and mixing it. Tillage loosens the soil, kills weeds, and improves the circulation of the water and air in the soil. The chief tillage devices are ploughs. At ploughing time, most farm fields are scattered with dead stalk, leaves, and other plant wasters from the preceding crop. Other field may have a cover crop, such as alfalfa or grass. Plants wasted and cover crops help protect soil from erosion. They also enrich the soil with nutrients if they are ploughed under.
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Most farmers make the seedbed by a process called …

Hydroponics is a method of growing plants using mineral nutrient solutions, in water, without …

A loudspeaker is an electroacoustic transducer that produces _______ in response to an electrical audio signal input.

Satellite radio is an analogue or digital radio signal that is ________ through one or more satellites and thus can be received in a much wider geographical area than terrestrial FM radio stations.

A receiver is a (an) _______ used to receive radio signals.