Multiple Choice Questions on Soil Science
Post: Soil science multiple choice questions. Topics: Soil formation, weathering of rocks, types of weathering, minerals and nutrients, Munsell colour chart, field capacity, classification of soil, earth crust, regolith, bulk density, tillage, etc.
| Type | Online mock test |
| Number of questions | 50 |
Also read: JRF MCQ
Answer key after each 5th mcq
Question 01. Clorites are basically silicates of which one of the following?
(a). Zinc with some iron and aluminium.
(b). Magnesium with some aluminium.
(c). Magnesium with some iron and aluminum.
(d). Zinc and iron.
Question 02. What are micelles?
(a). Negatively charged silt with low CEC.
(b). Negatively charged silt with high CEC.
(c). Positively charged silt with low CEC.
(d). Positively charged silt with high CEC.
Question 03. How is pedometrics defined?
(a). Statistical soil mapping.
(b). Quantitative soil making.
(c). Qualitative soil mapping.
(d). None of the above.
Question 04. What will be the total porosity of a soil with 1.325 g/cc B.D. and 2.65 g/cc P.D.?
(a). 35%.
(b). 40%.
(c). 45%.
(d). 50%.
Question 05. Which one of the following belongs to ultisols?
(a). Red clay soil.
(b). Sandy loam.
(c). Loam.
(d). Clay.
Soil science mcq
Question 06. In which regions are ultisols predominant?
(a). Temperate regions.
(b). Humid temperate or tropical regions.
(c). Tropical regions.
(d). All of the above.
Question 07. Who gave the criteria of essentiality?
(a). Liebig.
(b). Russel.
(c). Arnon.
(d). None of the above.
Question 08. Apatite is a group of minerals. What does it mainly contain?
(a). Potash.
(b). Phosphorus.
(c). Nitrogen.
(d). Iron.
Question 09. Soil lacking copper will result in..?
(a). Reclamation disease of cereals.
(b). Severe attack of anthracnose.
(c). White bud of maize.
(d). None of these.
Question 10. Chlorite belongs to which type of mineral?
(a). 2:1.
(b). 1:1.
(c). Either a or b.
(d). None of the above.
Question 11. Feed the soil not plant is the watch word of which one of the following?
(a). Precision farming.
(b). Natural farming.
(c). Eco-farming.
(d). Organic farming.
Question 12. The soil colour is determined by using..?
(a). Soil colour chart.
(b). Munsell colour chart.
(c). Both.
(d). None of these.
Soil science online mock test
Question 13. Which one is the ominant spectral colour of soil?
(a). Value.
(b). Hue.
(c). Chroma.
(d). All exhibit equal dominance.
Question 14. Which is a dominant spectral colour in Munsell colour chart?
(a). Red.
(b). Yellow.
(c). Blue.
(d). All.
Question 15. In Munsell colour chart, what does the value represent?
(a). Amount of reflected light.
(b). Strength of the colour.
(c). Both.
(d). None of the above.
Question 16. In Munsell colour chart, what does the value represent?
(a). Purity of the light.
(b). Strength of the colour.
(c). Either a or b.
(d). None of the above.
Question 17. Which is least resistant to weathering?
(a). Quartz.
(b). Calcite.
(c). Olivine.
(d). All of the above.
Question 18. What is the mineral composition of loam (sand, silt, clay) in percentage?
(a). 30, 30, 15.
(b). 40, 40, 20.
(c). 20, 20, 10.
(d). 50, 40, 25.
Question 19. What is the pore space of loam?
(a). 35%.
(b). 60%.
(c). 45%.
(d). 50%.
Question 20. What will be general position of a macro pore at field capacity?
(a). Water filled.
(b). OM filled.
(c). Air filled.
(d). All of the above.
Online quiz
Question 21. In which soil field will air capacity be more?
(a). Loamy soil.
(b). Sandy soil.
(c). Clay soil.
(d). None of the above.
Question 22. On whose idea were the early concepts of soil developed?
(a). Liebig.
(b). Rusel.
(c). Arnon.
(d). None of the above.
Question 23. Which country does Liebig belong?
(a). Russian chemist.
(b). Portuguese chemist.
(c). Brazilian chemist.
(d). German chemist.
Question 24. Who held the “balance-sheet” theory of plant nutrition?
(a). Arnon.
(b). Rusel.
(c). Liebig.
(d). None.
Question 25. What is the percentage of Si in earth-crust contains?
(a). 15.
(b). 33.
(c). 40.
(d). 27.
Question 26. Which is truly matched?
Composition of earth-crust.
(a). Mg – 2%.
(b). Na – 3%.
(c). Ca – 4%.
(d). All are true.
Question 27. How many major elements are present in soil?
(a). 2.
(b). 3.
(c). 4.
(d). 5.
Question 28. What is the percentage of soil mineral on volume basis?
(a). 50%.
(b). 45%.
(c). 35%.
(d). 25%.
Soil minerals
Question 29. Which element has least percentage on volume basis?
(a). Mineral.
(b). Air.
(c). Organic.
(d). Water.
Question 30. What happens when the moisture content of the soil increases?
(a). The air content decreases.
(b). The air content increases.
(c). It remains same.
(d). None of the above.
Question 31. There is an exchange of nutrients between the given components.
Sequence should be right.
(a). The soil solids and the soil solution and then between the soil solution and plants roots.
(b). The soil solution and plants roots and then the soil solids and the soil solution.
(c). Both a and b.
(d). None of the above.
Question 32. What is regolith?
(a). Process of breakdown and transformation of rocks and minerals into consolidated residues.
(b). Process of breakdown and transformation of rocks and minerals into unconsolidated residues.
(c). Process of breakdown and transformation of rocks and minerals into unconsolidated residues and it is an artificial process.
(d). All of the above.
Question 33. How is physical weathering designated?
(a). Integration.
(b). Decomposition.
(c). Disintegration.
(d). Composition.
Question 34. How is chemical weathering designated?
(a). Integration.
(b). Decomposition.
(c). Disintegration.
(d). Composition.
Weathering of rocks
Question 35. What is the cubical coefficient of expansion of feldspar and quartz present in most of the rock?
(a). 1:1.
(b). 2:1.
(c). 1:2.
(d). 2:2.
Question 36. What particle sizes are transported at a velocity of 5 m/sec by the wind?
(a). 0.25 mm.
(b). 0.15 mm.
(c). 0. 35 mm.
(d). 0.20 mm.
Question 37. What particle size can wind carry at a velocity of 10 m/sec?
(a). 0.50 mm.
(b). 1.50 mm.
(c). 1.00 mm.
(d). 2.00 mm.
Question 38. What happens in hydrolysis process?
(a). Increases in H-ion concentration resulting in the accelerated hydrolytic action of water.
(b). Decreases in H-ion concentration resulting in the accelerated hydrolytic action of water
(c). No change at all.
(d). None of the above.
Question 39. Which is a fundamental soil forming process?
(a). Eluviation.
(b). Illuaviation.
(c). Humification.
(d). All of the above.
Question 40. Who summarized the late 19th century geological concept of “soils in the origin and nature of soil”?
(a). Libieg.
(b). Rusel.
(c). Nathaniel Shaler.
(d). James Hutton.
Question 41. Which one is the result of tillage?
(a). Increased porosity.
(b). Decreased thermal conductivity.
(c). Increased surface temp.
(d). All of the above.
Question 42. What is th optimum pH range for availability of P?
(a). 5.5 – 6.5.
(b). 6.0 – 7.5.
(c). 7.0 – 8.0
(d). None of the above.
Objective questions on soil science
Question 43. When is the availability of P limited?
(a). When pH is below 5.5.
(b). When pH is 5.5 – 8.5.
(c). Both a and b.
(d). When pH is 6.0 – 7.0.
Question 44. Where is argillipedoturbation observed?
(a). Red soil.
(b). Forest soil.
(c). Desert soil.
(d). Deep black soil.
Question 45. What is th immediate product of hydration?
(a). KOH.
(b). HOH.
(c). Limonite.
(d). None of these.
Question 46. The availability of which nutrient element is higher in submerged soil?
(a). Fe.
(b). Zn.
(c). Both.
(d). None of the above.
Question 47. Zero tillage is also known by which name?
(a). Direct drilling.
(b). No-till farming.
(c). Both.
(d). ‘O’ tillage.
Question 48. What is the benefit of zero tillage?
(a). Decrease in soil erosion.
(b). Good moisture retention.
(c). High OM.
(d). All of the above.
Question 49. What is minimum tillage?
(a). Is a soil conservation system.
(b). Improve soil structure.
(c). Both a and b.
(d). None of the above.
Question 50. What is dry bulk density?
(a). M.ass of soil/volume as a whole
(b). Vice versa to ‘a’.
(c). Mass of soil plus liquids/ volume as a whole
(d). Vice versa of ‘c’.
Good questions!