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