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