MCQs Soil Science-55 Posted on August 23, 2025September 1, 2025Author agropublishers 0 MCQs Soil Science-55 1. Siderophores primarily increase the availability of ____________, a micronutrient, in calcareous soils Copper Manganese Zinc Iron 2. Shallow-rooted crops require__________ More frequent irrigation Higher fertilizer application rates Lower fertilizer application rates Less frequent irrigation 3. 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 4. Soil pH is a measure of__________________ Organic matter Hydrogen ion concentration Soil water contents Nutrient content 5. Due to high _____________ and high rain intensity much of the rainfall is being lost through evaporation and runoff Salinity pH Temperature Drought 6. What plays a crucial role in forming stable soil aggregates, thereby enhancing soil structure and reducing erosion? Plant roots All of these Soil microorganisms Earthworms 7. In the Earth’s atmosphere, the majority of nitrogen is present in the form of ____________ Ammonium ions (NH₄⁺) Nitrogen gas (N₂) Ammonia (NH₃) Nitrite ions (NO₂⁻) 8. 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 9. A soil solution with pH 7 is a _____ solution. Neutral Basic None of these Acidic 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