MCQs Soil Science-47 Posted on May 6, 2025August 30, 2025Author agropublishers 0 1. ________, the end product of nitrogen mineralization, can be used by plants Ammonium-N Nitrate-N Nitrogen gas Organic-N 2. What type of sediment is deposited in glacial lakes? Glaciomarine Glaciolacustrine Fluvial Lacustrine 3. Which practice can potentially reduce Nitrogen mineralization? Liming acidic soils Crop rotation Organic mulching Excessive tillage 4. Topaz (Mohs hardness 8) is least likely to be found in which soil type? Sandy soil Loamy soil Clayey soil Silt soil 5. Ecologically, which of the following adequately describes biodegradation? Breakdown of organic molecules Fragmentation of a complex organic molecule All of these Complete transformation of the organic molecule to mineral forms 6. Which of the following is not a cause of waterlogging? River flooding Poor canal drainage system Crop sowing time Heavy rainfall 7. Humus is a decomposed form of _________ Soil organic matter Hemicellulose Soil microorganisms Hormones 8. The “Priming Effect” is associated with the _________ Increased mineralization due to fresh OM addition Nutrient leaching Soil compaction None of these 9. Mineralization is slowest in___________ Tropical forests Temperate grasslands Arctic tundra Agricultural fields near equator 10. In clay-rich soils, which mineral is softest (Mohs hardness 1-2)? Kaolinite Calcite Quartz Dolomite Loading … Question 1 of 10
