Tag: soil pollution-control

Questions Related to soil pollution-control

The pH of water sample collected from a river was found to be acidic in the range of 3.5 to 4.5, on the banks of the river were several factories that were discharging effluents into the river. The effluents of which one of the following factories is the most likely cause for lowering the pH of river water?

commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

  1. Soap and detergent factory

  2. Lead battery manufacturing factory

  3. Plastic cup manufacturing factory

  4. Alcohol distillery

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Correct Option: B
Explanation:

Lead battery manufacturing factory have acid electrolyte, so it will cause for lowering tin pH of river water.

In this soil conservation method, several grasses are left out in soil after the crop is harvested

commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

  1. Tillage

  2. Crop rotation

  3. Terrace farming

  4. Contour farming

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Correct Option: D
Explanation:

Tillage is the method of mechanical agitation of various types like as digging, stirring, and overturning to improve the crop yield. Crop rotation helps in increase in soil fertility. It is the process of growing a series of different crops in the same area in sequenced seasons. Terrace farming is a type of farming that consists of various steps or terraces. In contour farming, several grasses are left out in soil after the crop is harvested. In contour farming, crops are placed perpendicular to slopes to follow the contours of a slope of a field. This helps in breaking down the flow of water and prevent soil erosion.

Thus, the correct answer is 'Contour farming.'

Mulching is a process, that helps in 

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  1. Moisture conservation

  2. Weed control

  3. Soil fertility

  4. Both A and B

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Correct Option: D
Explanation:

Mulch is a protective layer of a material, that is spread on top of the soil. Mulches can either be organic - such as grass clippings, straw, bark chips, or inorganic - such as stones, brick chips, and plastic. Materials used as mulches are used to retain soil moisture, regulate soil temperature, suppress weed growth, and for aesthetics. They are applied to the soil surface, around trees, paths, flower beds, to prevent soil erosion on slopes, and in production areas for flower and vegetable crops. Mulch layers are normally two inches or more deep when applied.