Description : Salination of soil is caused by – (1) pesticides (2) soil erosion (3) excess irrigation (4) crop rotation
Last Answer : (3) excess irrigation Explanation: Soil salinity is the salt content in the soil: the process of increasing the salt content is known as salinization. Excess irrigation leads to increase in ... is also greatly increased by poor drainage and use of saline water for irrigating agricultural crops.
Description : In a desert region, soil erosion can be checked by (1) Contour ploughing (2) Using farm manure (3) Tree plantation/Afforestaion (4) Crop rotation
Last Answer : Tree plantation/Afforestaion
Description : In a desert region, soil erosion can be checked by (1) Tree plantation/afforestation (2) Crop rotation (3) Contour ploughing (4) Using farm manure
Last Answer : Tree plantation/afforestation
Description : Hydraulic Action is a type of erosion caused by (1) Running water (2) Wind (3) Glacier (4) None of these
Last Answer : Running water
Description : Man can maintain an ecological balance in the biosphere by (1) deforestation (2) developing new breeds of cultivated plants and domesticated animals (3) using insecticides and pesticides (4) understanding the delicate balance in the relative number of organisms
Last Answer : understanding the delicate balance in the relative number of organisms
Description : The deflection of the winds to the right in the northern hemisphere is caused by : (1) revolution of the earth (2) rotation of the earth (3) uneven heating of the earth (4) All the above
Last Answer : rotation of the earth
Description : Earthquakes are caused by (1) Denudation (2) Tectonism (3) Earth revolution (4) Earth rotation
Last Answer : Tectonism
Description : Which one of the following is the indirect use of forests ? (1) Medicinal plants (2) Checking soil erosion (3) Building material (4) Grazing
Last Answer : Checking soil erosion
Description : The remedies to soil erosion are : I. Contour bunding II. Regulation of land use III. Cutting of trees IV. Allowing grazing of animals (1) I, III (2) I, II (3) III, IV (4) II, III
Last Answer : I, II
Description : Soil erosion can be prevented by (1) Increasing bird population (2) Afforestation (3) Removal of vegetation (4) Overgrazing
Last Answer : Afforestation
Description : Plantation of trees on a large scale to check soil erosion are called: (1) Shelter belts (2) Contour ploughing (3) Strip cropping (4) Afforestation
Description : Soil erosion on hill slopes can be checked by (1) Afforestation (2) Terrace cultivation (3) Strip cropping (4) Contour ploughing
Last Answer : Terrace cultivation
Description : Which one of the following does not cause soil erosion ? (1) Deflation (2) Deforestation (3) Weathering (4) Overcropping
Last Answer : Deflation
Description : The main advantage of Rain? Water Harvesting (RWH) is (1) Recharge ground water (2) Avoid floods (3) Reduce the loss of water (4) Avoid soil erosion
Last Answer : Recharge ground water
Description : The main cause of recurring flood is (1) Soil erosion (2) Deforestation (3) Silting of river beds (4) All of the above
Last Answer : All of the above
Description : Crop rotation helps to – (1) lessen use of pesticides (2) eliminate parasites which have selective hosts (3) yield more crops (4) produce a greater choice of plant products
Last Answer : (2) eliminate parasites which have selective hosts Explanation: The growing of different kinds of crops on a piece of land in a preplanned succession is known as crop rotation. In the rotation of ... This is because weeds and pests are very choosy about the host crop plant, which they attack.
Description : Crop rotation helps to a) lessen use of pesticides b) yield more crops c) produce a greater choice of plant products d) eliminate parasites which have selective hosts
Last Answer : d) eliminate parasites which have selective hosts
Description : In a desert region, soil erosion can be checked by – (1) Tree plantation/afforestation (2) Crop rotation (3) Contour ploughing (4) Using farm manure
Last Answer : (1) Tree plantation/afforestation Explanation: Soil erosion in a desert region can be checked by tree plantation and afforestation.
Description : In a desert region, soil erosion can be checked by – (1) Contour ploughing (2) Using farm manure (3) Tree plantation/Afforestaion (4) Crop rotation
Last Answer : (3) Tree plantation/Afforestaion Explanation: Afforestation holds the key for preventing soil erosion in desert regions and further desertification. Trees or even small plants bind soil to ... introduction of improved dry farming practices and animal husbandry and plantations for fuel and fodder.
Description : Alluvial soils are rich soil for crop cultivation but are poor in (1) humus (2) nitrogen and humus (3) organic material (4) inorganic material
Last Answer : nitrogen and humus
Description : Black soil is mainly related with the crop of (1) cotton (2) sugarcane (3) tea (4) coffee
Last Answer : cotton
Description : The land forms formed by wave erosion is : (1) Spit (2) Beach (3) Cave (4) Barrier island
Last Answer : Cave
Description : Granite, quartzite areas have upstanding look because (1) mechanically wealthered faster (2) these rocks are resistant to all kinds of erosion (3) these rocks are not easily croded (4) not easily worn down
Last Answer : not easily worn down
Description : Widening of a river valley takes place due to (1) Corrosion (2) Lateral erosion (3) Corrasion (4) Hydraulic action
Last Answer : Lateral erosion
Description : Rift Valley is formed (1) between two anticlines (2) between two faults (3) erosion of synclinal basin (4) due to volcanic eruption
Last Answer : between two faults
Description : The formation of ‘Mushroom rock’ in desert region is an example of (1) Deflation (2) Attrition (3) Abrasion (4) Erosion
Last Answer : Abrasion
Description : Breaking down of rock in situ is known as (1) Erosion (2) Weathering (3) Mass wasting (4) Degradation
Last Answer : Weathering
Description : Which of the following is a typical feature of river erosion in youthful stage ? (1) Ox-bow lake (2) Gorge (3) Valley in valley (4) Cut-bank
Last Answer : Gorge
Description : Which one of the following types of erosion is responsible for the formation of Chambal Ravines ? (1) Splash (2) Sheet (3) Rill (4) Gully
Last Answer : Gully
Description : Which one of the following types of erosion is responsible for the formation of Chambal Ravines? (1) Splash (2) Sheet (3) Rill (4) Gully
Description : Atmospheric pressure exerted on earth is due to : (1) rotation of earth (2) revolution of earth (3) gravitational pull (4) uneven heating of earth
Last Answer : gravitational pull
Description : If speed of rotation of the earth increases, the weight of the body (1) decreases (2) increases (3) remains the same (4) may increase or decrease
Last Answer : decreases
Description : Why the Earth is having its own atmosphere ? (1) Winds (2) Clouds (3) Gravity (4) Rotation of the Earth
Last Answer : Gravity
Description : The earth completes one rotation on its axis in : (1) 23 hrs. 56 min. 4.9 sec (2) 23 hrs. 10 min. 2 sec (3) 23 hrs. 30 min. (4) 24 hrs.
Last Answer : 23 hrs. 56 min. 4.9 sec
Description : Equator represents (1) line joining North and South poles (2) imaginary line passing round the Earth midway between North & South poles (3) a belt (ring) around the planet Saturn (4) axis of rotation of Earth
Last Answer : imaginary line passing round the Earth midway between North & South poles
Description : The moon is showing its same face to the earth because (1) It is not rotating about its own axis (2) Its rotation and revolution are opposite (3) Its periods of rotation and revolution are the same (4) Its rotation is faster than its revolution
Last Answer : Its periods of rotation and revolution are the same
Description : Crop rotation refers to : (a) method of farming without irrigation in an area of limited rainfall (b) farming done on the same land by different people turn-wise (c) growing same crop in alternate years (d) growing different crops in succession
Last Answer : Ans: (d)
Description : Global warming is expected to result in (1) Increase in level of sea (2) Change in crop pattern (3) Change in coastline (4) All of the above
Description : Which is a tropical food crop requiring a temperature of 270 C and a rain fall more than 100 cm? (1) Wheat (2) Maize (3) Rice (4) Barley
Last Answer : Rice
Description : The crop mainly grown in hills is : (1) sweet corn (2) sweet jowar (3) sweet potato (4) sweet pea
Last Answer : sweet jowar
Description : ‘Cloud burst’ means (1) Sowing of seeds of a crop in cloudy weather. (2) Abnormally heavy downpour of rain, associated with a thunderstorm. (3) Formation of artificial rain. (4) Presence of scattered flakes of cloud in the sky.
Last Answer : Abnormally heavy downpour of rain, associated with a thunderstorm.
Description : Cloud burst means (1) Formation of artificial rain (2) Abnormally heavy downpour of rain, associated with thunderstorm (3) Presence of scattered flakes of cloud in the sky (4) Sowing of seeds of a crop in a cloudy weather
Last Answer : Abnormally heavy downpour of rain, associated with thunderstorm
Description : Which of the following is/are methods of checking soil erosion? 1. Strip cropping 2. Contour ploughing 3. Use of irrigation and fertilisers 4. Terrace farming (a) 1 and 2 (b) 3 and 4 (c) 2, 3 and 4 (d) 1, 2, 3 and 4
Description : What is common to all of them? Select the most appropriate name. A. Soil erosion controlling methods. B. Traditional water harvesting methods. C. Modern methods of irrigation. D. All of them.
Last Answer : B. Traditional water harvesting methods.
Description : The following are the advantages of the modern methods of irrigation a. Large quantity of water is properly utilized b. No Soil erosion. c. Can be used in arid and semi-arid regions. d. All of the above
Last Answer : d. All of the above
Description : Which of the following is not an advantage of weeds? a. A Controls Soil Erosion b. B Expedites water flow in irrigation canals c. C Maintain Soil Fertility d. D Used as fodder
Last Answer : b. B Expedites water flow in irrigation canals
Description : Tides in the sea are caused by (1) effect of Sun (2) effect of Moon (3) eombined effect of Moon and Sun (4) gravitational force of Earth and Sun
Last Answer : eombined effect of Moon and Sun
Description : Tides are caused by the gravitational pull of the (1) Earth on the Moon (2) Earth on the Sun (3) Sun and Moon on the Earth (4) Moon on the Earth
Last Answer : Sun and Moon on the Earth
Description : Rainfall caused by intense evaporation in equatorial areas is called _______ (1) Orographic rainfall (2) Cyclonic rainfall (3) Frontal rainfall (4) Convectional rainfall
Last Answer : Convectional rainfall
Description : Frontal Rain is caused by (1) Convection current (2) Winds from sea (3) Cyclonic activity (4) Condensation of water evaporated from mountains
Last Answer : Cyclonic activity