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