Exposure of the manures to rains causes highest loss of___________?

Related Mcqs:

1. Green manures are mostly used as a source of:_________?

   A. Zink
   B. Nitrogen
   C. Oxygen
   D. None of these

   Submitted by: Shafiq Rehman

2. In low-rainfall areas, huge shifting sand dunes are commonly found, particularly near human habitations. Techniques of afforesting the shifting dunes needed to be implemented. These techniques consist of___________?

   A. Treatment of shifting sand-dunes by fixing barriers in parallel stripes or in a chess-board design, using the local shrub material starting from the crest of the dunes to protect the seedlings from burial or exposure by the blowing of sand.
   B. Protection against biotic interference
   C. Both a & b
   D. None of these

   Submitted by: Shafiq Rehman

3. The water loss through transpiration from vegetative and evaporation from soil surface is known as__________________?

   A. Evaptranspiration
   B. Transpiration
   C. Evaporation
   D. Guttation

4. The basic form of present day Universal soil loss equation (USLE), initially involved the use of factors such as ________?

   A. R, K and S
   B. R and K
   C. R, K, S and L
   D. R, K, S, L, C and P

   Submitted by: Shafiq Rehman

5. Loss of nitrogen in the form of NH3 in alkaline medium is known as_________?

   A. Denitrification
   B. Leaching
   C. Volatilization
   D. None of these

   Submitted by: Shafiq Rehman

6. Which bacteria causes fermentation__________________?

   A. Azotobacter
   B. Bacillus
   C. Pseudomonas
   D. Corey

7. According to a latest research, Pakistan is predominantly a dryland country; 80% of its land area is arid and semi arid, 12% sub-humid and 8% under humid climate. Thus , soils of arid & semi-arid regions are vulnerable to a wide range of degradation process. As the case in arid and semi-arid climates elsewhere in south-central/southern Asia and Sub-Saharan Africa; _________________ are among the major causes of soil degradation and desertification?

   A. Drought stress
   B. Accelerated erosion & salinization
   C. Depletion of soil fertility and SOM
   D. All of the above

   Submitted by: Shafiq Rehman

8. Causes of Soil are:__________?

   A. Indiscriminate felling of trees
   B. Over grazing
   C. Mismanagement of irrigation syste
   D. All of these

   Submitted by: Shafiq Rehman

9. Loss off leaves due to seasonal change is_________________?

   A. Leeward
   B. Defoliation
   C. Malformation
   D. None of the above

10. The horizontal flow of water in irrigation channel or canal leading to water loss is called as:_________?

    A. Infiltration
    B. Percolation
    C. Seepage
    D. All of these

    Submitted by: Shafiq Rehman