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