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