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