The particlesw density of a mineral soil is about____________________?

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

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

5. 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

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. _________refers to the increase in density of a soil as a result of applied load or pressure?

   A. Traffic soles
   B. Plough soles
   C. Compaction
   D. Pudding

   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. The major soil fertility problems in Pakistani soils deficiencies of N, P and Zn. Deficiencies K, Fe, and B also occur in specific crop genotypes or soil types, while deficiencies of S, Cu, and Mn are negligible. however, the common nutrient deficiencies are_________________: and some micronutrients including Mo?

   A. N, P, K
   B. Ca, Mg, S
   C. both A & B
   D. The above statement is wrong

   Submitted by: Shafiq Rehman

10. Nitrogen & sulphur dioxide liberate from motor vehicles & industries. Nitrogen & Sulphur gases dissolve in the water vapour of atmosphere & form nitric & sulphuric acid. This rain water falls on soil as__________ & contaminates soil also:

    A. Acid rain
    B. Neutral rain
    C. Both A & B
    D. None of the above

    Submitted by: Shafiq Rehman