TRB BT Assistant - Soils and Agricultural Geography Online Test (MCQ Quiz)

1. What is the uppermost layer of the Earth's crust, rich in organic matter and minerals, called?

A) Subsoil B) Regolith C) Topsoil D) Parent material

2. Which soil horizon is characterized by accumulation of leached materials, typically lighter in color?

A) O horizon B) A horizon C) B horizon D) C horizon

3. The process by which soil particles are transported by wind or water is known as:

A) Weathering B) Leaching C) Erosion D) Humification

4. Which type of soil is formed from the decomposition of organic matter and is typically dark in color and nutrient-rich?

A) Laterite soil B) Peaty soil C) Chrono soil D) Alluvial soil

5. Alluvial soils are primarily found in:

A) Desert regions B) Mountainous areas C) River valleys and coastal plains D) Volcanic regions

6. Which soil type is known for its high clay content, poor drainage, and often reddish color due to iron oxides, prevalent in tropical and subtropical regions?

A) Black soil B) Red soil C) Laterite soil D) Sandy soil

7. Black soils, also known as Regur, are best suited for the cultivation of:

A) Rice and wheat B) Cotton and sugarcane C) Tea and coffee D) Pulses and millets

8. The parent material from which soil is formed is also referred to as:

A) Humus B) Regolith C) Leachate D) Pedalfer

9. What is the primary factor determining the texture of a soil?

A) Organic matter content B) Proportion of sand, silt, and clay particles C) pH level D) Moisture content

10. Soils with a high proportion of sand particles are generally:

A) Good at retaining water B) Poorly drained C) Well-drained and aerated D) Rich in nutrients

11. Which of the following is NOT a major factor influencing soil formation?

A) Climate B) Parent material C) Topography D) Soil depth

12. The 'O' horizon in a soil profile consists mainly of:

A) Partially decomposed organic matter B) Weathered rock fragments C) Accumulated clay and iron D) Mineral soil with little organic matter

13. Which soil horizon is the zone of eluviation, where materials are removed by leaching?

A) A horizon B) B horizon C) C horizon D) R horizon

14. The pH of soil primarily affects:

A) Soil texture B) Water retention C) Nutrient availability to plants D) Soil structure

15. Podzol soils are typically found in:

A) Tropical rainforests B) Temperate grasslands C) Boreal forests (Taiga) D) Arid deserts

16. Which agricultural practice aims to prevent soil erosion by planting crops in alternating strips along contours?

A) Crop rotation B) Terracing C) Contour farming D) Mulching

17. The process of adding organic matter to soil to improve its fertility and structure is called:

A) Erosion control B) Soil amendment C) Salinization D) Desertification

18. Which type of soil erosion involves the removal of a thin layer of topsoil over a wide area?

A) Gully erosion B) Sheet erosion C) Rill erosion D) Wind erosion

19. The accumulation of salts in the upper layers of soil, often due to poor irrigation practices in arid and semi-arid regions, is known as:

A) Acidification B) Salinization C) Laterization D) Calcification

20. Agricultural land that is no longer productive due to soil degradation or desertification is referred to as:

A) Arable land B) Marginal land C) Degraded land D) Fertile land

21. Chernozems, known for their high fertility, are characteristic soils of:

A) Tropical savannas B) Temperate grasslands C) Mediterranean scrublands D) Alpine meadows

22. Which factor is most critical for the successful cultivation of rice in most regions?

A) Well-drained, sandy soil B) Loamy soil with good aeration C) Clayey soil with high water retention D) Acidic soil with low nutrient content

23. The breakdown of rocks and minerals into smaller particles by physical, chemical, and biological processes is called:

A) Soil formation B) Pedogenesis C) Weathering D) Soil creep

24. A soil profile is a vertical cross-section of the soil, showing its different:

A) Particle sizes B) Chemical compositions C) Horizons D) Moisture levels

25. Which soil type has a gritty feel and is formed from the weathering of rocks like granite?

A) Clay soil B) Silt soil C) Sandy soil D) Loam soil

26. What is the ideal soil texture for most agricultural crops, balancing water retention and drainage?

A) Pure sand B) Pure clay C) Loam D) Silt

27. The process of converting dead organic matter into stable humus is called:

A) Mineralization B) Humification C) Nitrification D) Denitrification

28. Which type of agriculture focuses on cultivating crops that are adapted to the local climate and soil conditions, often with minimal external inputs?

A) Industrial agriculture B) Subsistence agriculture C) Intensive agriculture D) Extensive agriculture

29. The practice of growing different crops in the same area in sequenced seasons is known as:

A) Intercropping B) Monoculture C) Crop rotation D) Polyculture

30. Which soil horizon is the least weathered and most resembles the parent material?

A) A horizon B) B horizon C) C horizon D) E horizon

31. Soils formed from the weathering of basaltic rocks are typically rich in:

A) Silica B) Iron and magnesium C) Potassium D) Calcium carbonate

32. The ability of soil to support plant growth is known as:

A) Soil structure B) Soil porosity C) Soil fertility D) Soil density

33. Which agricultural region is characterized by extensive cultivation of grains like wheat and corn on large, flat plains?

A) Mediterranean region B) Tropical plantation region C) Temperate grassland region D) Highland region

34. The process of removing excess water from saturated soil is called:

A) Irrigation B) Drainage C) Leaching D) Aeration

35. Which soil type is characterized by a smooth, soapy feel when moist and is sticky when wet?

A) Sandy soil B) Silty soil C) Clay soil D) Loam soil

36. The impact of farming practices on soil health is a central concern in:

A) Urban planning B) Environmental geography C) Economic geography D) Political geography

37. Which term describes the process where fertile topsoil is lost due to unsustainable farming, leading to reduced agricultural productivity?

A) Soil enrichment B) Soil conservation C) Soil degradation D) Soil aeration

38. What is the primary cause of waterlogging in agricultural fields?

A) Excessive sunlight B) High evaporation rates C) Poor drainage D) Low soil organic matter

39. Soils rich in humus are generally:

A) Pale in color and infertile B) Dark in color and fertile C) Sandy and well-drained D) Heavy clay and poorly aerated

40. The 'B' horizon, or subsoil, is primarily characterized by:

A) Accumulation of leached materials B) Surface litter and organic matter C) Weathered parent material D) Bedrock

41. Which of the following is a type of intensive farming often practiced in areas with limited land and high population density?

A) Nomadic herding B) Shifting cultivation C) Market gardening D) Extensive grain farming

42. The geological process that creates new soil by breaking down rocks is:

A) Deposition B) Erosion C) Weathering D) Compaction

43. Which soil conservation technique involves planting trees or shrubs around fields to protect against wind erosion?

A) Cover cropping B) Strip cropping C) Windbreaks D) No-till farming

44. Soils with a high organic matter content tend to have:

A) Low water-holding capacity B) Poor nutrient content C) Good soil structure and aeration D) High susceptibility to erosion

45. What is the term for the study of soils, including their formation, classification, and agricultural potential?

A) Geology B) Pedology C) Agronomy D) Ecology

46. Which agricultural practice helps in maintaining soil fertility and structure by incorporating crop residues back into the soil?

A) Fallowing B) Burning crop residues C) Green manuring D) Overgrazing

47. The term 'arable land' refers to land that is:

A) Covered by forests B) Suitable for growing crops C) Permanently frozen D) Too steep for cultivation

48. Which soil order is characterized by the presence of permafrost and is found in cold, treeless regions?

A) Aridisols B) Mollisols C) Gelisols D) Spodosols

49. The agricultural practice of planting crops on steep slopes after cutting steps into the land is called:

A) Contour plowing B) Strip farming C) Terracing D) Mulching

50. Soils developed under grasslands are typically known for their:

A) Low organic matter and poor structure B) High acidity and rapid leaching C) Deep, dark surface horizons and high fertility D) Shallow profiles and low water-holding capacity

Soils and Agricultural Geography - Online Test

Test Results