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

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. 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

4. 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

5. A soil is classified as sodic soil when______________________?

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

6. 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

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

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

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

   A. Andisols, Gelisols, Histosols, Spodosols, Oxisols, Ultisols
   B. Entisols, Inceptisols, Aridisols, Alfisols, Mollisols, Vertisols
   C. Andisols, Aridisols, Histosols, Vertisols, Regosols, Libosols
   D. The above statement is wrong

   Submitted by: Shafiq Rehman

10. The availability of essential nutrients from soil to the plants is controlled by the ________ properties of soil:

    A. Physical
    B. chemical
    C. Biological
    D. both A & B

    Submitted by: Shafiq Rehman