2.Assertion (A): Biotic resources are those things which are obtained from biosphere and have life. Reason (R): Resouces are vital for servival of human beging as well as maintaining quality of life.
3.Assertion (A): The dedudation of the soil cover and subsequent washing down is described as soil erosion. Reason (R): The process of soil erosion formation and erosion go on simultaneously and generally there is a balance between two.
4.Assertion (A): Potential resources are those which are found in a region, but have not been utilized. Reason (R): The western parts of India have enormous potential for the development of wind and solar energy.
5.Assertion (A): Wind blows loose soil off flat or sloping land known as wind erosion. Reason (R): Soil erosion is also caused due to defective methods of farming.
6.Assertion (A):The first International Earth Summit was held in June 1992 in Rio de Janeiro in Brazil.Reason (R): The summit was convened for addressing urgent problems of environmental protection and Socio - economic development at the global level.
7.Assertion (A): The laterite soil develops under tropical and sub-tropical climate with alternate wet and dry season. Reason (R): This soil is the result of intense leaching due to heavy rain.
8.Assertion (A): According to the age, soils can be classified as Banger and Khadar. Reason (R): The banger soil has higher concentration of kankar nodules than the khadar.
Banger= old alluvial soil, Khadar= new alluvial soil.
9.Assertion (A):The black soil are black in colour and are also known as regur soil. Reason (R): Black soil are ideal for growing cotton and is also known as black cotton soil.
10.Assertion (A): Laterite has been derived from the Latin word 'later' which means brick. Reason (R): They are generally sandy in texture and saline in nature.
11.Assertion (A): Sardar Sarovar Dam has been built over the Narmada River in Gujarat. Reason (R):This is one of the largest water resource projects of India covering four states.
States are Maharashtra, Madhya Pradesh, Gujarat and Rajasthan.
12.Assertion (A): The availability of resources is not the only necessary condition for the development of any region. Reason (R): Not only availability of resources but also corresponding change in technology is necessary for the development of any region.
13. Assertion (A): Dams were traditionally built to impound rivers and rainwater that could be used later to irrigate agricultural field. Reason (R): Today dams are built not just for irrigation but for electricity generation, water supply for domestic and industrial uses, flood control etc.
14.Assertion (A): Change in cropping pattern from cereals to high value crops is seen beneficial for Indian economy. Reason (R): India can follow the way of successful economy by exporting farm products and importing cereals.
15.Assertion (A): Biochemical inputs and irrigation are used for obtaining higher production. Reason (R): Doses of biochemical input are used to grow crops rapidly.
16.Assertion (A): Jute grows well on well drained fertile soils in the flood plains where soils are renewed every year. Reason (R): West Bengal, Bihar, Assam, Odisha and Meghalaya are the major jute producing state.
17.Assertion (A): India has three cropping seasons- ravi, kharif and zaid. Reason (R): Ravi crops are grown with the onset of monsoon in different parts of the country and these are hervested in September- October.
18.Assertion (A): Indian coffee is known in the world for its good quality. Reason (R): The Arabica variety initially brought from Yeman is produced in the economy.
19.Assertion (A):Wheat requires 50 to 75 cm of annual rainfall evenly distributed over the growing season. Reason (R); There are two important wheat-growing zones in the country- the Ganga- Satluj plains in the north-wast and black soil region of the Deccen.
20.Assertion (A): Arid soil is unsuitable for cultivation. Reason (R): Arid soil is generally sandy in texture and saline in nature. It restricts the filtration of water.
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