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