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