Which silica mineral is present in soil in abundant quantity____________________?

Related Mcqs:

1. Most abundant mineral in the earth crust is______________________?

   A. N-Feldspar
   B. Feldspar
   C. S-Feldspar
   D. Amplubole

2. Any material such as straw, sawdust, leaves, plastic films, & loose soil that is spread upon the surface of the soil to protect the soil & plant roots from the effects of raindrops, soil crusting, freezing or evaporation:

   A. Mull
   B. Mulch
   C. Mycorrhizae
   D. Muck

   Submitted by: Shafiq Rehman

3. The kaolininte is a layer silicate clay mineral, it is 1:1 type of mineral with___________________?

   A. 3-15 meq/100g CEC
   B. 40 meq/100g CEC
   C. 50 meq/100g CEC
   D. None of the above

4. Mineral soil contain organic carbon___________________?

   A. >4%
   B. 5%
   C. <20%
   D. >10%

5. The particlesw density of a mineral soil is about____________________?

   A. 2750 Kg m-3
   B. 2550 Kg m-3
   C. 2650 Kg m-3
   D. None of the above

6. The mineral component of soil consists of_________?

   A. Air
   B. Water
   C. both A and B
   D. none of the above

   Submitted by: Shafiq Rehman

7. Soil additive which stabilizes the soil, improves resistance to erosion, increases to permeability to air & water, improves texture, eases cultivation or otherwise improves soil quality:

   A. Soil amendment
   B. Soil conditioner
   C. Both a & b
   D. None of the above

   Submitted by: Shafiq Rehman

8. The most abundant metal in the earth’s crust and toxic to plants in low concentration is____________________?

   A. Mo
   B. Al
   C. Fe
   D. All the above

9. Most abundant organic compound in nature?

   A. Cellulose
   B. Hemicellulose
   C. Lignin
   D. All of these

   Submitted by: Shafiq Rehman

10. A soil is classified as sodic soil when______________________?

    A. EC is 8.5
    C. SAR is >13
    D. All the above