2. Regeneration period and periodic
blocks
PB:1
AGE: 1-25 Years
PB:2
AGE: 26-50 Years
PB:4
AGE: 75-100 Years
PB:3
AGE:51-75 Years
3. • Regeneration period refers to the period
required for regenerating the whole of the
periodic block.
• Regeneration interval is the interval between
seeding felling and final felling of a particular
area.
• Periodic block is the part or parts set aside to
be regenerated in a particular period
4. • Uniform system is a kind of shelterwood
system aiming at concentrated regeneration
in which the canopy is uniformly opened up
over the whole area of a compartment to
obtain uniform regeneration
5. Objectives
• To obtain seeds naturally
• To provide shelter
• To regulate light conditions
( 12-15 seed bearers are retained each hectare)
6. Felling pattern
• Seeding felling
the Retained tree should be genetically superior
and trees should have clean, cylindrical bole,
bigger crown, etc.
• Secondary felling
• Final felling
7. Advantages
• Little risk of soil deterioration
• Little danger of invasion of weeds
• Felling is simple
• Young crop is protected from cold winds,
insulation etc.
• New crops obtained are genetically superior
• Supervision is easy
