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