Prolonged liberal irrigation of agricultural fields is likely to create the problem of:

Related Mcqs:

1. Which important greenhouse gas other than methane is being produced from the agricultural fields?

   A. Arsine
   B. SO2
   C. NH3
   D. N2O

2. Which plant has become a troublesome weed in agricultural fields?

   A. Cyperus rotundus
   B. Eichhornia creassipes
   C. Parthenium hysterophorus
   D. Chenopodium album

3. Dams and canal networks developed for irrigation purposes in Pakistan and may other countries create the problem of:

   A. Salinity and soil erosion
   B. Soil depletion and water logging
   C. Salinity and water logging
   D. Soil erosion and depletion

4. Plants die from prolonged water logging because:

   A. Soil nutrients become very dilute
   B. Root respiration stops
   C. Nutrients leach down due to excessive water
   D. Cell sap in plant becomes too dilute

5. Reclamation of dry sites without irrigation is / are:

   A. General considerations
   B. Species for dry zone reclamation
   C. Site preparation
   D. None of these

6. Of the ________ million ha area under cultivation, 15.62 million ha area (76%) is under irrigation:

   A. 21
   B. 22
   C. 23
   D. 24

7. In Pakistan about ________ area is arid or semi arid and agriculture is not possible without irrigation:

   A. 40%
   B. 50%
   C. 60%
   D. 70%

8. With the construction of Thal irrigation canal, about _____ sand dunes have been converted into highly productive cultivated areas:

   A. 1 m ha
   B. 2 m ha
   C. 3 m ha
   D. 4 m ha

9. Common combinations of the agroforestry system in Pakistan are: Trees species: Agricultural crops grown with trees:

   A. Poplars: wheat / maize / turmeric / sugarcane / vegetables / fodder
   B. Eucalypts: wheat/sunflower/tomatoes/potatoes/chilies
   C. Simal: maize/sunflower/vegetables/fodder
   D. Shisham: turmeric/wheat/maize/vegetables
   E. All of the above

10. Norman Borlaug, the American agricultural scientist and plant pathologist developed the high yield strains that greatly increased crop yields. He laid the groundwork for the green revolution and was awarded the Nobel Prize for Peace in ________

    A. 1970
    B. 1972
    C. 1974
    D. 1976