The mineral component of soil consists of_________?

Related Mcqs:

1. 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

2. 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

3. Mineral soil contain organic carbon___________________?

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

4. 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

5. Which silica mineral is present in soil in abundant quantity____________________?

   A. Quartz
   B. Smectite
   C. Gypsum
   D. All the above

6. 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

7. An important component of total soil C is charcoal, also known as:__________?

   A. Black C
   B. Biochar
   C. Both A & B
   D. None of the above

   Submitted by: Shafiq Rehman

8. A soil is classified as sodic soil when______________________?

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

9. Addition of sodium hexametaphosphate in soil for determination of soil texture causes__________________?

   A. Agregation of soil particles
   B. Cementing of soil particles
   C. Dispersion of soil particles
   D. All the above

10. Organic P content in soil, by ignition method is estimated by igniting the soil at ____________________?

    A. 250ºC
    B. 1000ºC
    C. 550ºC
    D. 1250ºC