Tag: natural resources and agriculture

Questions Related to natural resources and agriculture

The type of pollution which is found the third most is

zoology natural resources and agriculture pollution of soil degradation of land damaging the forests

  1. Land or landscape pollution

  2. Controlled tipping

  3. Noise pollution

  4. UV pollution

Show answer
Correct Option: A
Explanation:

The three main types of pollution are 1. Air Pollution 2. Water Pollution 3. Soil Pollution. Rapid urbanization, with the consequent increase in population and building construction, has resulted in the reduction of land for the wastes to be disposed of.

Every year solid wastes are increasing tremendously all over the world. Several hazardous chemicals and the mountains of wastes are ultimately dumped on the land. For example sources of soil, pollution is 
1. Industrial wastes, 2. Urban wastes, 3. Radioactive pollutants, 4. Agricultural practices, 5. Biological agents, 6. Soil sediments.
So the correct answer is 'Land or landscape pollution'.

Mine spoil is

zoology natural resources and agriculture pollution of soil degradation of land damaging the forests

  1. Wastes from mines

  2. Wastes from mine processing

  3. Land degraded by mining

  4. Both A and B

Show answer
Correct Option: C
Explanation:
A spoil tip is a pile built of accumulated spoil – the overburden or other waste rock removed during coal and ore mining.
So, the correct answer is 'land degraded by mining'

Taungya is practice of

zoology natural resources and agriculture pollution of soil degradation of land damaging the forests

  1. Shifting cultivation

  2. Agroforestry

  3. Production forestry

  4. Both A and B

Show answer
Correct Option: D
Explanation:

Taungya is practice of shifting cultivation and agroforestry. If is a form of agroforestry system. In this, the villagers are given the right to cultivate short term crops during the early stages of forest plantation establishment. This is continued until trees shade crops due to canopy closure. This is done to utilize the land, control weeds, generate extra income.

Thus, the correct answer is 'Both A and B.'

An agroforestry, taungya consists of

zoology natural resources and agriculture pollution of soil degradation of land damaging the forests

  1. Growing crops in between rows of trees

  2. Growing crops after removal of trees

  3. Growing trees on degraded soils

  4. All of the above

Show answer
Correct Option: A
Explanation:

Taungya system is a form of agroforestry system in which short term crops are grown in the early years of the plantation of a woody perennials species in order to utilize the land, control weeds, reduce establishment costs, generate early income and stimulate the development of the woody perennial species.

So, the correct answer is 'Growing crops in between rows of trees'

Measurement of the rate of oxygen consumption in unit volume of water over a period of time is done to find out

biology natural resources and agriculture effects of water pollution effect of water pollution water pollution and its control

  1. Biogas generation

  2. Biological oxygen demand

  3. Biosynthetic pathways

  4. Fermentation

Show answer
Correct Option: B
Explanation:

Decomposition of organic matter by microbes requires oxygen. Degree of impurity of water due to organic matter is measured in terms of 'Biological Oxygen Demand (BOD)'. BOD is the oxygen in milligrams required for 5 days in 1 litre of water at 20 degree centigrades for the microorganisms to metabolise organic wastes.

Biological Oxygen Demand (BOD) is a measure of

biology natural resources and agriculture effects of water pollution effect of water pollution water pollution and its control

  1. Industrial wastes poured into water bodies.

  2. Extent to which water is polluted with organic compounds.

  3. Amount of carbon monoxide inseparably combined with haemoglobin.

  4. Amount of oxygen needed by green plants during night.

Show answer
Correct Option: B
Explanation:

Decomposition of organic matter by microbes requires oxygen. Degree of impurity of water due to organic matter is measured in terms of Biochemical oxygen demand or (BOD). BOD is the oxygen required by microorganisms to completely metabolise organic wastes present in water.

Huge quantity of sewage is dumped in a river. The BOD will.

biology natural resources and agriculture effects of water pollution effect of water pollution water pollution and its control

  1. Increase

  2. Decrease

  3. Slightly decrease

  4. Remain unchanged

Show answer
Correct Option: A
Explanation:

A huge quantity of sewage increases Organic matter in the river water.

The oxygen demand by bacteria to degrade the organic matter increases.
The biological oxygen demand increases.
So, the correct option is 'Increase'.

Biochemical oxygen demand measures

biology natural resources and agriculture effects of water pollution effect of water pollution water pollution and its control

  1. Industrial pollution

  2. Air pollution

  3. Dissolved oxygen required for decomposers

  4. Pollution capacity of effluents

Show answer
Correct Option: C
Explanation:
Biochemical oxygen demand or BOD is the amount of oxygen required to decompose organic matter in one litre of polluted water.
If the water is more polluted, more will be the BOD because more will be the organic matter present in it and hence, more oxygen will be required to decompose it.
So, BOD measures the amount of dissolved oxygen required for decomposers to decompose the organic matter in the water.
So, the correct answer is 'Dissolved oxygen required for decomposers'.

Multiple Choice Questions
Biochemical oxygen demand may not be good index for water bodies receiving effluents from.

biology natural resources and agriculture effects of water pollution effect of water pollution water pollution and its control

  1. Sugar industry

  2. Domestic sewage

  3. Dairy industry

  4. Petroleum industry

Show answer
Correct Option: D
Explanation:

Biochemical Oxygen Demand or BOD is the amount of dissolved oxygen in a water body, required by microorganisms for the aerobic breakdown of organic matter in the water. Petroleum waste consists of inorganic constituents that also may cut off the oxygen supply into the water body thus BOD may not be a good index for water receiving effluents containing it.

So, the correct option is 'petroleum industry'.

When a fertilizer contains at least two or more nutrients is called as _____ fertilizer.

biology natural resources and agriculture manure manures and fertilisers role of organic manures in soil management

  1. Simple

  2. Complex

  3. Chemical

  4. None of the above

Show answer
Correct Option: B
Explanation:

Complex fertilizers (also known as compound fertlizers) are made from mixing two or more of macro-nutrient type fertilizers. They may also be further blended with elements that provide some of the less-common plant nutrients (known as secondary or trace nutrients, such as sulfur, calcium and magnesium).

Thus, the correct answer is option B.