This quiz works best with JavaScript enabled. Home > Agriculture > Soil Science > Chemistry > Soil Chemistry – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Soil Chemistry Quiz 2 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What do the letters PH stand for? A) Potassium Hydrate. B) Potential Hydrogen. C) Potassium and Holding. D) Acidic solution. Show Answer Correct Answer: B) Potential Hydrogen. 2. When soils are waterlogged it is likely that this nutrient will be lost through leaching, resulting eventually in the older leaves of the plant yellowing. A) Nitrogen. B) Oxygen. C) N2O - Nitrous Oxide. D) Atomospheric gases (Air). Show Answer Correct Answer: A) Nitrogen. 3. In which state of energy will water move? A) Low energy to high energy. B) High energy to high energy. C) High energy to low energy. D) Low energy to low energy. Show Answer Correct Answer: C) High energy to low energy. 4. During which process is nitrogen moved from the air to the soil to be used by plants and then returned to the atmosphere to be used again? A) Water cycle. B) Nitrogen cycle. C) Ammonification. D) Fixtation. Show Answer Correct Answer: B) Nitrogen cycle. 5. Why is it important to plant row crops directly near the water line? A) So the plant can get as much gravitational water as it can before it runs through. B) So the water front can reach the plant. C) So the dry soil can pull the water towards plant. D) None of above. Show Answer Correct Answer: B) So the water front can reach the plant. 6. Soil that is saturated is said to have a water potential of ..... A) Zero. B) Negative. C) Positive. D) None of above. Show Answer Correct Answer: A) Zero. 7. Water potential can be defined as A) The adhesion of water. B) Water moving through a substance. C) The ability for water to move in soil. D) The ability for water to bond. Show Answer Correct Answer: C) The ability for water to move in soil. 8. What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere? A) Assimilation. B) Fixation. C) Ammonification. D) Denitrification. Show Answer Correct Answer: D) Denitrification. 9. Soil acidity results from many sources. Select a natural process which can cause soil acidity. A) The reaction of Carbon Dioxide and Water. B) Use of organic fertilizers. C) Nitrification of ammonium fertilizers. D) An inherently sandy soil. Show Answer Correct Answer: A) The reaction of Carbon Dioxide and Water. 10. ..... is the conversion of organic nitrogen into ammonia A) Assimilation. B) Denitrification. C) Ammonification. D) Nitrogen Fixation. Show Answer Correct Answer: C) Ammonification. 11. In which soil hold water is called ..... A) Soil. B) Soil Moisture. C) Soil Erosion. D) Moisture. Show Answer Correct Answer: B) Soil Moisture. 12. Which soil layer is made up of small lumps of rocks? A) C-Horizon. B) A-Horizon. C) B-Horizon. D) Bedrock. Show Answer Correct Answer: A) C-Horizon. 13. What is the property of water that allows it to stick to other water molecules? A) Solubility. B) Capillary Action. C) Adhesion. D) Cohesion. Show Answer Correct Answer: D) Cohesion. 14. Which one of these is NOT a macro-nutrient A) Boron. B) Nitrogen. C) Calcium. D) Potassium. Show Answer Correct Answer: A) Boron. 15. Which of the following has the biggest soil particles A) Silt Soil. B) Loamy Soil. C) Sandy soil. D) Clayey soil. Show Answer Correct Answer: C) Sandy soil. 16. The deposition of leached material in the lower layers of soil. A) Aeration. B) Illuviation. C) Leaching. D) Percolation. Show Answer Correct Answer: B) Illuviation. 17. If a soil or solution is acidic then it is A) Above 8 PH. B) Near 7 PH. C) Below 6 PH. D) None of above. Show Answer Correct Answer: C) Below 6 PH. 18. The removal of land surface by ..... A) Moisture. B) Water. C) Soil. D) Crops. Show Answer Correct Answer: B) Water. 19. Most soil group in Ilocos Sur A) Entisol. B) Oxisol. C) Ultisol. D) Inceptisol. Show Answer Correct Answer: A) Entisol. 20. Gravitational water moves more rapidly due to A) Small pore space. B) Small particle size. C) Large pore space. D) None of above. Show Answer Correct Answer: C) Large pore space. 21. Infiltration is ..... A) The ability to maintain correct water balance. B) Liquid slowly passing through a filter. C) An inverted filtration occurrence. D) Waters ability to enter the surface layer of the soil. Show Answer Correct Answer: D) Waters ability to enter the surface layer of the soil. 22. Soil is known for its importance in different aspects except: A) The production of food. B) Maintaining the balance of carbon, nitrogen, and phosphorus. C) For the construction of building materials. D) None of the above. Show Answer Correct Answer: D) None of the above. 23. What is the property of water that allows it to stick to other surfaces? A) Surface tension. B) Adhesion. C) Solubility. D) Cohesion. Show Answer Correct Answer: B) Adhesion. 24. - is important for the life of earth A) Water. B) Percolation. C) Soil. D) Plant. Show Answer Correct Answer: C) Soil. 25. ..... from the atmosphere that are converted to nitrates are eventually deposited in soil. A) Sulfur dioxide. B) Nitrogen oxides. C) Sulfur oxide. D) Particulate lead. Show Answer Correct Answer: B) Nitrogen oxides. 26. Which soil horizon contains humus? A) Bedrock. B) C-Horizon. C) B-Horizon. D) A-Horizon. Show Answer Correct Answer: D) A-Horizon. 27. The layer which is generally harder and more compact A) C - Horizon. B) B - Horizon. C) Bedrock. D) A - horizon. Show Answer Correct Answer: B) B - Horizon. 28. The ..... is the aqueous portion of soil that contains dissolved matter from the chemical and biochemical processes in soil and from the exchange with the hydrosphere and biosphere. A) Organic matter. B) Transpiration. C) Desertification. D) Soil solution. Show Answer Correct Answer: D) Soil solution. 29. The bits of decayed living organisms in the soil are called A) Mineral nutrients. B) Humus. C) Compost. D) All of the above. Show Answer Correct Answer: B) Humus. 30. It is made up of small particles: A) Loamy Soil. B) Sandy Soil. C) Clayey Soil. D) None of above. Show Answer Correct Answer: C) Clayey Soil. ← PreviousNext →Related QuizzesSoil Science QuizzesAgriculture QuizzesSoil Chemistry Quiz 1Soil Chemistry Quiz 3Soil Chemistry Quiz 4 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books