The calcium carbonate content which is usually between 6 and 10%, has reached into the deeper layers, forming a zone of lime nodules (Kankar) at about _____ depth:

Related Mcqs:

1. A minima rotation worth the name is specified which corresponds to the age at which the trees reach the exploitable size which is usually 120 years, but is 150 years for the deodar, fir and kail in the moist zone of Kaghan 200 years for the ry zone of ______

   A. Swat
   B. Naran
   C. Kaghan
   D. None of these

2. A bacterium found in the root nodules of leguminous plants is the:

   A. Clostridium
   B. Azotobacter
   C. Nitrobacter
   D. Rhizobium

3. The best seed moisture content is below 10% of the oven dry weight for the coniferous but it must be kept above _____ for most of the broad leaved species:

   A. 20%
   B. 25%
   C. 30%
   D. 35%

4. A part of the rock forming material of the earth comprises:

   A. Oxides of Ca and Na
   B. Oxides of Ca and K
   C. Aluminosilicates of Na, K and Ca
   D. Nitrates of Fe and Al

5. The ecosystem lying in the alpine zone between taiga and polar ice is called:

   A. Savana
   B. Autotrophic
   C. Heterotrophic
   D. Tundra

6. The transition zone between two different types of communities is called:

   A. Biome
   B. Ecotone
   C. Biological spectrum
   D. Biological clock

7. The L- and H-layers are differentiated in:

   A. Mull
   B. Mor
   C. Peat
   D. Muck

8. The grasslands do not possess the horizon layers:

   A. A00
   B. A1
   C. Both (a) & (b)
   D. A00 and A1

9. The elevation of the Sulaiman Range is between _____ above sea level:

   A. 1000 and 2000 m
   B. 1540 and 3400 m
   C. 2000 and 4000 m
   D. None of these

10. The atmospheric UV radiations are absorbed in the zone called:

    A. Troposphere
    B. Stratosphere
    C. Mesosphere
    D. Thermosphere