MCQs Soil Science-46 Posted on May 5, 2025August 30, 2025Author agropublishers 0 1. Sulfur mineralization is the process by which microorganisms break down organic sulfur compounds in the soil, releasing _________ SO₂ Elemental S Sulfate ions (SO₄²⁻) H₂S 2. Which process competes with mineralization for nitrogen? Volatilization Immobilization Denitrification Nitrification 3. The “Global Soil Partnership” (GSP) was launched by _________________ UNDP USAID FAO World Bank 4. The mass of ONE mole of K2HPO4 is approximately ________ grams 348.2 89 136.1 174.17 5. Which of the following is the primary indicator of soil health? Soil texture Soil organic carbon Soil color Soil temperature 6. Which soil pH range is more suitable for nitrification? 8.5–10.0 3.0–5.0 <3.0 6.5–8.0 7. The conversion of organic nitrogen to inorganic nitrogen (ammonia) is called_________ Mineralization Ammonification Immobilization Nitrification 8. _________ is vital for nitrogen fixation in soil Streptococcus Rhizobium Lactobacillus E. coli 9. ___________ element is not released through mineralization Phosphorus (P) Carbon (C) Nitrogen (N) Aluminum (Al) 10. Ammonification is the process by which microorganisms break down organic matter and can release _________ as an end product NO₃⁻ N₂O NH₄⁺ N₂ Loading … Question 1 of 10
