Quiz on Soil ScienceQuiz – 3 - January 4, 2021 | January 4, 2021 - AgriScan 1 minute read QUIZ STARTResults #1. Which of the following is called Agricultural lime? CaCO3 CaSiO3 Ca(OH)2 CaO #2. Which is the CCE of basic slag? 179 136 109 86 #3. Shape of Halloysite is ______? Plate shaped Tubular Needle shaped Floppy #4. Basal spacing of illite is _______? 7.2 A 10.1 A 20 A 14 A #5. Which one of the following is not an example of metamorphic rock? Marble Granite Calcite Gneiss #6. Basic rocks contains ________ % of silica? 65 - 70 40 - 55 55 - 65 20 - 30 #7. What is the % of Fe in Earth’s crust? 27.2 49.39 8.67 4.71 #8. Which one of the following is te source of both CA & MG? Olivine Apatite Gypsum Dolomite #9. Soil order that is characterized by peat, bog, Organic soil (>20 % organic matter) is called ______? Oxisols Gelisols Entisols Histosols #10. Newer alluvium is also termed as _______? None Khaddar Bhangar #11. Honeycomb like structure found in which soil? Black Red Alluvium Lateritic #12. Which of the microorganisms is highest in soil in terms of biomass? Virus Fungi Bacteria Actinomycetes #13. Rhizobium is nutritionally _______? Autotrophic anaerobic Heterotrophic anaerobic Autotrophic aerobic Heterotrophic aerobic #14. Which is not true for humus? C = 15% C:N = 10:1 CEC = 200 - 400 meq/100g N = 5% #15. Soil is considered as organic soil when it contains at least ______% of organic manner? 5 20 10 50 #16. Which of the following does take longest time to decompose? Cellulose Sugar protein lignin #17. The fraction of humus having higher molecular weight and insoluble in both acid and alkali is called ______? Humic acid Fuluic acid Humin Hymatomelanic acid #18. The C content in organic matter is ________? 0.78% 1.724% 20% 58% #19. Which is essential for Ammonia volatilization? High temperature Alkaline medium ASB Submergence Previous Finish
