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