This set of Energy & Environment Management Multiple Choice Questions & Answers (MCQs) focuses on “Land Resources”.
Explanation: Landmass may be often written as one word to distinguish it from the usage ‘landmass’ which means measure of land. Landmass includes super continents, continents. Hence a land surrounded by oceans continuously is called as landmass.
2. How many major continuous landmass are there?
Explanation: On earth there are four major continuous landmasses are there. They are, Afro-Rurasia, the Americans, Antarctica and Australia. A part from the above four major continuous landmasses there are many minor landmasses also present.
3. Land capable of being ploughed and used to grow crops is called as________________
a) Domestic land
b) Arable land
c) Un arable land
d) Dry land
Explanation: Arable land is land that can be used for growing crops. Country with the most arable land in the world is United States having the share of 10.5% of the world’s arable land. India stands in second position with the production of 9.22%.
4. Out of the total land area, how many million hectares of land suffer from degradation?
Explanation: 175 million hectares of land area suffer from degradation. Land degradation is caused largely by soil erosion but also by water logging and excessive salinity. The high degree of degradation will affect the existing land resources.
5. Wearing away of a field’s topsoil by the natural physical forces of water and wind is known as_____________
a) Wind erosion
b) Soil erosion
c) Water erosion
d) Sand erosion
Explanation: Along with water and wind there is one more factor that determines the soil erosion and that is through forces associated with farming activities such as tillage, erosion, whether it is by water or wind.
Explanation: The impact of raindrops on the soil surfaces can break down soil aggregates and disperse the aggregate material. Lighter aggregate materials such as very fine sand, silt, clay and organic matter are easily removed by raindrops.
7. Estimate of the ability of soils to resist erosion, based on the physical characteristics of each soil is known as__________________
a) Soil erodibility
b) Soil erosion
c) Soil potentiality
d) Soil neutrality
Explanation: Texture is the principle characteristic affecting erodibility. Generally, soils with faster infiltration rates, higher levels of organic matter and improved soil structure have a greater resistance to erosion.
8. Low lying tract of land enclosed by dikes that forms an artificial hydrological entity is known as_________________
Explanation: A polder has no connection with outside water other than through manually operated device used. There are three types of polder. They are, Land reclaimed, flood plains and the last one is marshes.
9. In Germany marshes separated from the surrounding water by a dike are known as______________
d) Flood plains
Explanation: A koog is one of the types of polder found on the North Sea West of Germany. Koog is established by the construction of dykes enclosing the land which is drained to form marshland. Koog is protected by embankments known as dykes.
10. Hydroponics is a technique of growing crops without__________________
Explanation: Hydroponics is the technique of growing plants in a soil less medium, or an aquatic based environment. Hydroponics is a subset of hydro culture. Hydroponic growing uses mineral nutrient solutions to feed the plants.
11. The land which is abandoned and declared as not good for cultivation anymore is known as_____________
c) Derelict land
d) Catchment land
Explanation: Derelict land is the land that has become damaged by industrial or other development and beyond use without any kind of treatment. The treatment that is given for derelict land are demolition and leveling.
d) Chemical fertilizers
Explanation: Soil is the material found on the surface of the earth that is composed of organic and inorganic material. Soil varies in its composition and the structure of its particles. Soil is a vital important to the sustainability of an ecosystem.
13. A collapse of a mass of earth or rock from a mountain is known as__________________
Explanation: During landslides huge masses of land slide down destroying anything in its path. Various development activities like construction of dams, reservoirs, roads require large space which results in deforestation. This activity increases chances of landslides.
14. Process of conversion of productive land to arid or semi arid lands is known as________________
Explanation: Desertification is classified into two types, moderate desertification in which 10 to 25% drop in productivity and one more is serious desertification in which there is more than 50% drop in the productivity. This desertification leads to depletion of ground water.
Sanfoundry Global Education & Learning Series – Energy & Environment Management.
To practice all areas of Energy & Environment Management, here is complete set of 1000+ Multiple Choice Questions and Answers.