Plant Ecology and Phytogeography - II Main

 1. Which is the uppermost weathered layer of the earth crust.

• a.  Rock

• b. Soil

•  c.  Water  

• d.  Air

2.  The study of soil is called Pedology/ Soil Science

• True

• False

3.  Soil originates from parent rocks by a process is called --------------

•  a.  Weathering

• b.  Solubilization

• c.  Exfoliation

• d.  Freezing

4.  The nutrients are easily washed through the soil in wet weather is called hungry soil.

• True

• False

5.  Soil particles larger than 2mm size are

•   a.  Coarse Sand

• b.  Fine Sand

•  c.  Gravel

• D.   Silt

6.  Extreme temperature variations causing expansion, contraction and disintegration of rocks.

• True

• False

7. 7. Which soil contains few nutrients and retains large amount of moisture

• a.  Chalk soil

• b.  Loam soil

• c.  Peat soil

• d.  Clay soil

8.  Loam soils are

•  a.   Partly gritty

• b.  Partly sticky

• c.  Crumbly easy

• d.  All of these

9.  Mineral matter components of soil is about ------------- %

• a.  45%

• b.   40%

• c.   25%

• d.   20%

10.  Podzolization means------------

• a.  Hydroides of aluminium and iron are leached from A horizon

• b.  Humus and minerals leached out from the A horizon

• c.   Carbonates of calcium and magnesium is retained in B horizon

• d.  Accumulation of organic material in the B horizon