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