Forestry

A systems where the crop originates from coppice and where the rotation of the coppice is short.

A systems where the crop originates from coppice and where the rotation of the coppice is long.

Both (a) & (b)

None of these

Phosphene

SiF4

Dust

Halogens

A group of independent and integrating populations of different species

A group of independent and interacting populations of same species

A group of a independent and interacting populations of same species in a specific area

A group of independent and interacting populations of different species in a specific area

1960

1961

1962

1963

Preparation of seed beds for established of plants

To eliminate weed competition

To replace soil layer by fresh layer soil

All of the above

50

100

150

200

Hockey stick, tennis, badminton and squash racket

Camp furniture picker arms and carriage building

Both (a) & (b)

None of these

Turbidity of solar radiations

Percentage of solar absorption

Percentage of reflected light by a surface

Amount of light absorbed by forests

28.6

26.8

22.6

22.8

Sr90, I131

Cr51, Cu64

Zr95, Mn54

All of these