MCQs Soil Science-55 Posted on August 23, 2025September 1, 2025Author agropublishers 0 MCQs Soil Science-55 1. What plays a crucial role in forming stable soil aggregates, thereby enhancing soil structure and reducing erosion? Soil microorganisms Plant roots Earthworms All of these 2. Due to high _____________ and high rain intensity much of the rainfall is being lost through evaporation and runoff Temperature Drought pH Salinity 3. ________is a key component of certain amino acids, which are crucial building blocks of proteins. Copper Calcium Sulfur Potassium 4. A soil solution with pH 7 is a _____ solution. Acidic None of these Neutral Basic 5. Soil pH is a measure of__________________ Hydrogen ion concentration Organic matter Nutrient content Soil water contents 6. Better management of rainwater in rainfed systems can reduce excessive runoff, leading to soil erosion and poor yields due to a lack of soil moisture False False 7. Siderophores primarily increase the availability of ____________, a micronutrient, in calcareous soils Iron Zinc Copper Manganese 8. Shallow-rooted crops require__________ Less frequent irrigation Higher fertilizer application rates More frequent irrigation Lower fertilizer application rates 9. Water can play a crucial enabling role in strengthening the resilience of social, economic, and environmental systems in the face of rapid and unpredictable changes. False True 10. In the Earth’s atmosphere, the majority of nitrogen is present in the form of ____________ Nitrogen gas (N₂) Ammonium ions (NH₄⁺) Nitrite ions (NO₂⁻) Ammonia (NH₃) Loading … Question 1 of 10