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...