MCQs Soil Science-53 Posted on June 27, 2025August 30, 2025Author agropublishers 0 1. __________ is commonly used to determine potassium content in soil and plant samples. Flame photometer Spectrophotometer EC meter pH meter 2. Micronutrients are required in small amounts and normally constitute __________ of a plant’s dry weight More than 10,000 mg kg –1 (1.0%) None of these 1000 mg kg –1 (0.1%) or more Less than 500 mg kg –1 (0.05%) 3. What is the primary gaseous product lost from soil due to the volatilization of nitrogenous fertilizers? Nitric oxide (NO) Ammonia gas (NH₃) Nitrogen gas (N₂) Nitrogen dioxide (NO₂) 4. What type of soil particle is known for its poor water infiltration and drainage? Clay Loam Sand Silt 5. _________ is commonly used for collecting soil samples from the field Soil gauge Penetrometer Soil moisture meter Soil auger 6. Aluminum toxicity is a major concern in ______________ soils Sodic Alkaline Acidic Neutral 7. Availability of __________ increased in alkaline soils Iron Copper Molybdenum Zinc 8. Siderophores, produced by soil biota, are primarily _______________ High molecular weight compounds Broad-spectrum antibiotics Plant growth regulators Iron transporting and chelating compounds 9. Volatilization loss of nitrogen (N) is relatively higher in _______ soils Clayey soils Sandy soils Alkaline soils Acidic soils 10. NDVI is an abbreviation of __________ None of these Normalized Difference Vegetation Index Nitrogen Density Vegetation Indicator Nutrient Deficiency Verification Instrument Loading … Question 1 of 10
