This quiz works best with JavaScript enabled. Home > Soil Science > Soil Chemistry – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Soil Chemistry Quiz 4 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If a soil or solution is alkaline then it is A) Above 8 PH. B) Near 7 PH. C) Below 6 PH. D) None of above. Show Answer Correct Answer: A) Above 8 PH. 2. Which topsoil is best suited for growing plants A) Sandy Soil. B) Loamy Soil. C) Clayey Soil. D) None of these. Show Answer Correct Answer: B) Loamy Soil. 3. The process in which Nitrogen circulates and is recycled is called ..... A) The nitrogen cycle. B) The water cycle. C) The carbon cycle. D) Nitrogen Fixation. Show Answer Correct Answer: A) The nitrogen cycle. 4. Jisna conducted an experiment in the field related to the rates of percolation. she observed that it took 50 min for 2.5 l of water to percolate through the soil sample. Calculate the rate of percolation. A) 50ml/min. B) 40ml/min. C) 55ml/min. D) None of above. Show Answer Correct Answer: A) 50ml/min. 5. Lentils (masoor) and other pulses are grown in which of the following soil type? A) Sandy Soil. B) Clayey Soil. C) Loamy Soil. D) None of these. Show Answer Correct Answer: C) Loamy Soil. 6. Roots of plants can go deep to which layer? A) Bedrock. B) E-Horizon. C) B-Horizon. D) None of above. Show Answer Correct Answer: C) B-Horizon. 7. Soil is the most important resources A) Abiotic. B) Natural. C) Biotic. D) Dirty. Show Answer Correct Answer: B) Natural. 8. Which of the following soil type is loosely packed with large air spaces? A) Sandy Soil. B) Clayey Soil. C) Loamy soil. D) None of these. Show Answer Correct Answer: A) Sandy Soil. 9. As soil particle size decreases, the water holding capacity of the soil A) Decreases. B) Increases. C) Stays the same. D) None of above. Show Answer Correct Answer: B) Increases. 10. Organisms that need nitrogen to survive A) Only plants. B) Only animals. C) Only bacteria. D) All living organisms. Show Answer Correct Answer: D) All living organisms. 11. (Choose the best answer). Percolation is: A) Liquid slowly passing through a filter. B) Liquids ability to enter the surface layer of soil. C) Water being absorbed into the atmosphere. D) None of above. Show Answer Correct Answer: A) Liquid slowly passing through a filter. 12. Which layer is important for healthy growing of plants? A) O-Horizon. B) A-Horizon. C) Bedrock. D) C-Horizon. Show Answer Correct Answer: B) A-Horizon. 13. What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds? A) Nitrogen composition. B) Ammonia. C) Nitrogen fixation. D) Denitrification. Show Answer Correct Answer: C) Nitrogen fixation. 14. Which of the following types of soil water is available to plants? A) Gravitational. B) Hygroscopic. C) Capillary. D) None of above. Show Answer Correct Answer: C) Capillary. 15. The optimum soil pH for most plant growth is ..... because most nutrient minerals needed by plants are available in that pH range. A) 6 - 7. B) 4 - 5. C) 7 - 8. D) 5 - 6. Show Answer Correct Answer: A) 6 - 7. 16. How many types of soil are there A) 1. B) 2. C) 4. D) 3. Show Answer Correct Answer: C) 4. 17. Soil has how many layers? A) 5. B) 6. C) 2. D) 3. Show Answer Correct Answer: B) 6. 18. How is nitrogen "fixed" into a usable form for plants? A) Through action of bacteria only. B) Through lightning only. C) Through action of bacteria and lightning. D) Through photosynthesis. Show Answer Correct Answer: C) Through action of bacteria and lightning. 19. Organisms that breakdown organic materials into nutrients. A) Worms. B) Ants. C) Fungi. D) None of above. Show Answer Correct Answer: A) Worms. 20. The soils which are suitable for growing cereals like wheat and gram A) Sandy and clayey soil. B) Loamy and Sandy soil. C) Clayey and loamy soil. D) None of above. Show Answer Correct Answer: C) Clayey and loamy soil. ← PreviousNext →Related QuizzesSoil Chemistry Quiz 1Soil Chemistry Quiz 2Soil Chemistry Quiz 3Soil Chemistry Quiz 5Soil Chemistry Quiz 6Fundamentals Of Soil Science QuizSoil Science Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books