Generally speaking, only level to nearly level (0-2 % slope) & gently sloping lands (2-5 % slope) should be:

Related Mcqs:

1. _________ erosion is the removal of a thin layer of soil by water acting over the whole surface. This type of erosion damaged very fertile lands located on slopes, some of which have been eroded to a depth of about 15 cm.

   A. Rain splash rill erosion
   B. Stream bank erosion
   C. Sheet erosion
   D. Gully erosion

   Submitted by: Shafiq Rehman

2. The lands which are rich in soluble salts and exchangeable sodium:

   A. Saline soil
   B. Saline-Alkaline
   C. Alkaline
   D. None of the above

   Submitted by: Shafiq Rehman

3. A group of soils with same parent material but located at different positions of slope?

   A. Cateena
   B. Chronosequence
   C. Catena
   D. Biosequence

   Submitted by: Shafiq Rehman

4. Erosion permitting and erosion resisting crops grow alternatively at right angle to the slope of the land is called as:_________?

   A. Linear planting
   B. Strip planting
   C. Cover planting
   D. All of the above

   Submitted by: Shafiq Rehman

5. Deep percolation from a soil profile is generally measured by a device known as_____________________?

   A. Hydrometer
   B. Lysimeter
   C. Thermometer
   D. Tensiometer

6. Organic matter in Pakistani soils is generally:_________?

   A. less than 1 %
   B. less than 10 %
   C. 3 %
   D. 5%

   Submitted by: Shafiq Rehman

7. 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

8. Humus generally refers to the decomposed organic residues which have undergone a series of degradation and synthesis cycles. The humic substances consist of a series of highly acidic, yellow to black coloured, high molecular weight compounds __________________, which can be separated using different extraction procedures:

   A. Hymatomelanic  acid & Humin
   B. Humic acid & Fulvic acid
   C. both A & B
   D. None of these

   Submitted by: Shafiq Rehman

9. Organic matter decomposes rapidly in Pakistani soils because of ____________ conditions, that is why our soils generally have < 1% organic matter:

   A. High temperature
   B. Alkaline
   C. Both a & b
   D. None of a & b

   Submitted by: Shafiq Rehman

10. The deficient level of N (%) in plants suggested by various workers is____________________?

    A. 0%
    B. 3%
    C. 5%
    D. 10%