A soil is categorized as saline when EC of saturation extract is______________________?

Related Mcqs:

1. The conductivity of a saturation extract is greater 4 dsm-1 an exchangeable sodium percentage (ESP) of less than 15 and the pH is usually less than 8.5 is called as__________________?

   A. Saline soils
   B. Saline-sodic soils
   C. Sodic soils
   D. Neutral soils

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 suitable species for reclamation of saline & sodic soil is:__________?

   A. Casuarina equisetifolia
   B. Albizia lebbeck
   C. Both A & B
   D. None of the above

   Submitted by: Shafiq Rehman

4. What happens when an saline-alkaline soil is reached with water:

   A. pH decrease, Ec increase
   B. pH & Ec both increase
   C. pH increase & Ec decrease
   D. None of these

   Submitted by: Mir Mehrbiyar

5. 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

6. Agar is an extract from____________________?

   A. Fungi
   B. Algae
   C. Bacteria
   D. None of the above

7. Which compound is mostly used in Pakistan for the reclamation of saline-sodic & sodic soils_________________?

   A. Apatite
   B. Calcite
   C. Dolomite
   D. Gypsum

8. Vegetation found in saline soils is termed by _________?

   A. Halophyte
   B. Hetrophyics
   C. Viticphyics
   D. Hortiphyics

   Submitted by: Zakir Memon

9. The exact formula for calculating the base saturation percentage is_____________________?

   A. Bas saturation percentage = CA+Mg+Na / CEC x 100
   B. Bas saturation percentage = /CEC / CA+Mg+Na x 100
   C. Bas saturation percentage = /CEC / CA+Mg x 100
   D. None of the above

10. Although some acid soils do exist in the northern mountainous regions of Pakistan (Mansehra, Sawat, Dir). Almost all cultivated soils of the country are ________________, with high base saturation and low organic matter content (generally less than 1%)?

    A. Alkaline
    B. Very much acidic
    C. Calcareous
    D. both A & C

    Submitted by: Shafiq Rehman