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