Boron concentration is irrigation water is considered safe only upto_________________?

Related Mcqs:

1. The indicator used for estimation of the soil available boron is_______?

   A. Mixed indicator
   B. Phenolpthalein
   C. Diphenyle
   D. Azomethine-H

   Submitted by: Shafiq Rehman

2. 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

3. In tomato, Boron deficiency leads to:__________?

   A. Silvering
   B. Piffiness
   C. Cracking
   D. All of the above

   Submitted by: Mir Mehrbiyar

4. The safe limit of No2 in drinking water is_____________________?

   A. 10 mg L-1
   B. 15 mg L-1
   C. 20 mg L-1
   D. None of the above

5. The EC: SAR and RSC values suggested by WAPDA for 3rd class irrigation water(C,S,R,) are____________________?

   A. ECi:<1.5, SAR < 10 & RSC< 2.5
   B. ECi:>1.5, SAR > 10 & RSC> 2.5
   C. ECi:>1.5, SAR 2.5
   D. Both a & b

6. An atmosphere with reduced concentration of O2 and increased concentration of CO2 is called_______________?

   A. Refrigeration
   B. Oxidation
   C. Humidity control
   D. Controlled atmosphere

7. The depth of irrigation water required for the full crop period is called_________?

   A. Delta of water 
   B. Water required
   C. Crop water required
   D. None of these

   Submitted by: Mukhtir Ali jan

8. What is the concentration of pure water?

   A. 55.5 mol/L
   B. 45.5 mol/L
   C. Both a and b
   D. none of these

   Submitted by: Shafiq Rehman

9. Which method of irrigation is possible under the economical conditions of Pakistan __________________?

   A. Canal system
   B. Modified basin system
   C. Drip irrigation
   D. All the above

10. Sprinkler irrigation is suitable, where soil has:_________?

    A. Clayey texture
    B. Undulating topography
    C. Loamy texture
    D. All of these 

    Submitted by: Shafiq Rehman