This quiz works best with JavaScript enabled. Home > Agriculture > Soil Science > Fundamentals Research > Fundamentals Of Soil Science – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Fundamentals Of Soil Science Quiz 20 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the top layer of soil made up of broken down pieces of dead plants and animals? A) Humus. B) Topsoil. C) Bedrock. D) Subsoil. Show Answer Correct Answer: A) Humus. 2. Which type of soil can hold a lot of water? A) Silty. B) Sandy. C) Peaty. D) Clay. Show Answer Correct Answer: D) Clay. 3. Soil is important for A) Agriculture. B) Food. C) Plants. D) All of the above. Show Answer Correct Answer: D) All of the above. 4. Well carrying out capillarity, the following should be the same EXCEPT ..... A) Amount of soil. B) Type of soil. C) Size of the cotton wool. D) Diameter of tubes. Show Answer Correct Answer: B) Type of soil. 5. Which of the following is a warm season crop? A) Oats. B) Broccoli. C) Eggplant. D) Potatoes. Show Answer Correct Answer: C) Eggplant. 6. The practice of growing plants without soil, but by adding the plants' nutrients directly to the water. A) Hydroglyphics. B) Hydroponics. C) Hydrosphere. D) Hydrocycle. Show Answer Correct Answer: B) Hydroponics. 7. After heavy rain, the percent water remaining in soil 2 to 3 days after filled up and after free drainage has practically ceased. A) Field capacity. B) Saturation point. C) Hydroscopic coefficient. D) Permanent wilting point. Show Answer Correct Answer: A) Field capacity. 8. Soil is a mixture of ..... A) Air, minerals and water. B) Living and non-living things. C) Sand, silt, clay and nutrients. D) All of the above. Show Answer Correct Answer: D) All of the above. 9. What is the relationship between particle size and permeability? A) As particle size increases, the permeability increases. B) As permeability decreases, the particle size decreases. C) As permeability increases, the particle size remains constant. D) As particle size increases, the permeability decreases. Show Answer Correct Answer: A) As particle size increases, the permeability increases. 10. To break down or decay living things is called: A) Trees. B) Plant matter. C) Decompose. D) Weathering. Show Answer Correct Answer: C) Decompose. 11. What consists of clay and other particles washed down from the A horizon, but little humus A) Humus. B) Loam. C) Bedrock. D) Subsoil. Show Answer Correct Answer: D) Subsoil. 12. Farm effluent is the waste from dairy factories, dairy sheds and piggeries and includes dung, urine and udder wash. A) It adds nutrients to the soil. B) It adds organic matter to the soil. C) It adds water to the soil. D) All of the above. Show Answer Correct Answer: D) All of the above. 13. Which type of soil is a mixture of the other types of soil? A) Sand. B) Loam. C) Silt. D) Clay. Show Answer Correct Answer: B) Loam. 14. Name the particles that is smallest in size A) Silt. B) Sand. C) Gravel. D) Clay. Show Answer Correct Answer: D) Clay. 15. What is a material found on the surface of the earth consisting of rock, sand, clay, dead plants, and animal remains? A) Loam. B) Silt. C) Soil. D) Bedrock. Show Answer Correct Answer: C) Soil. 16. Which one of these soil holds water A) Organic. B) Sand. C) Clay. D) None of above. Show Answer Correct Answer: C) Clay. 17. Which of the following best describes soil erosion? A) The addition of soil. B) The improvement of soil. C) The movement of soil by wind or water. D) The breakdown of soil. Show Answer Correct Answer: C) The movement of soil by wind or water. 18. What makes up the scientific name of an organism? A) Kingdom and Phylum. B) Family and Genus. C) Genus and Species. D) None of above. Show Answer Correct Answer: C) Genus and Species. 19. Humus is formed from rotting ..... A) Clay and soil. B) Animal and plants. C) Wood and rocks. D) None of above. Show Answer Correct Answer: B) Animal and plants. 20. The organic matter in humus is made of A) Dead worms. B) Stems. C) Roots. D) All of the above. Show Answer Correct Answer: D) All of the above. 21. Many plants cannot grow in sandy soil. Why is this true? A) Sandy soil does not hold enough water. B) Air cannot pass through sandy soil. C) Roots cannot easily push through sandy soil. D) Sandy soil has too many nutrients. Show Answer Correct Answer: A) Sandy soil does not hold enough water. 22. Soil profile refers to an arrangement within a soil of - A) Its horizontal layout. B) Vertical layout. C) Size of soil particles. D) None of above. Show Answer Correct Answer: B) Vertical layout. 23. What process breaks down bedrock to begin soil formation? A) Leaching. B) Humus. C) Weathering. D) Decomposition. Show Answer Correct Answer: C) Weathering. 24. An example of an angiosperm is A) Pine tree. B) Fern. C) Moss. D) Sunflower. Show Answer Correct Answer: D) Sunflower. 25. What is the layer under the Humus that provides support and nutrients to plants? A) Topsoil. B) Subsoil. C) Humus. D) Bedrock. Show Answer Correct Answer: A) Topsoil. 26. Often phrased as an "If, Then" statement, this is an educated guess for a solution to a scientific problem. A) Answer. B) Fact. C) Hypothesis. D) Solution. Show Answer Correct Answer: C) Hypothesis. 27. What land class that restricts the use of plants? A) Class 3. B) Class 2. C) Class 7. D) Class 5. Show Answer Correct Answer: C) Class 7. 28. The middle layer of soil is called ..... A) Topsoil. B) Subsoil. C) Bedrock. D) None of above. Show Answer Correct Answer: B) Subsoil. 29. No tillage can improve levels of organic matter in the soil. This is when A) The type of crops grown in a paddock is changed regularly in a planned order. B) Fast-growing crops are grown and ploughed back into the soil before they seed. C) Part of a crop not harvested for sale can be returned to the soil. D) The soil is not cultivated, but seeds are sown directly into the soil. Show Answer Correct Answer: D) The soil is not cultivated, but seeds are sown directly into the soil. 30. The experiment done by heating the soil in a glass container then smoke is observed shows that ..... is in the soil A) Air. B) Animals. C) Water. D) Organic matter. Show Answer Correct Answer: D) Organic matter. ← PreviousNext →Related QuizzesSoil Science QuizzesAgriculture QuizzesFundamentals Of Soil Science Quiz 1Fundamentals Of Soil Science Quiz 2Fundamentals Of Soil Science Quiz 3Fundamentals Of Soil Science Quiz 4Fundamentals Of Soil Science Quiz 5Fundamentals Of Soil Science Quiz 6Fundamentals Of Soil Science Quiz 7Fundamentals Of Soil Science Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books