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