There are twelve soil orders found in the world of which six soil orders have been recognized at various locations are________?

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. 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

3. Source of negative charges on silicate clays is/ are________?

   A. Exposed crystal edges
   B. Isomorphous substitution
   C. Anion exchange
   D. All of these

   Submitted by: Shafiq Rehman

4. The resistance of a soil at various moisture contents to mechanical stresses or manipulations:

   A. Soil crusting
   B. Soil consistence
   C. Bulk Density
   D. Both a & c

   Submitted by: Shafiq Rehman

5. Who consider the various properties of soil in relation to plant production?

   A. Pedologist
   B. Soil chemist
   C. Edaphologists
   D. agronomist

   Submitted by: Shafiq Rehman

6. A soil is classified as sodic soil when______________________?

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

7. 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

8. 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

9. Soil erosion is __________ of soil from one place ti another place by natural agencies (wind & water):

   A. Detachement of soil
   B. Transportation
   C. both A & B
   D. None of these

   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