Ø Deodar Forests are worked under selection system or irregular shelterwood system or more often under uniform system or its modification with Concentrated Regeneration on a rotation of 120 to 150 years and regeneration periodic is 30 years.
Ø Rotation: 120 years
Ø Regeneration: 30 Years
The forest is divided into 4 Periodic Blocks as under:-
Periodic Block I, II, III, IV.
· Periodic Block I:
Ø Comprising of a predominantly mature crop. This is demarcated into two blocks:
(a) One which has undergone seedling felling but Regeneration is yet to be established.
(b) Other in which seeding fellings are to be carried out.
· Periodic Block II: Comprising mainly of middle-aged to mature crop.
· Periodic Block III: Comprising mainly a young to middle-aged crop.
· Periodic Block IV: Comprising of a predominately young crop.
FELLINGS IN PERIODIC BLOCKS I AREAS
The pattern of carrying out fellings in Periodic Block I trees is as follows:
1. The seed bears should be of the 60 to 70 cm diameter class.
2. The average distance between two seed bears should be 15 mts and about 30 to 35 seed bearers per Hectare should be retained.
3. In case of a mixed crop, Deodar should be preferred to other species for retention as seed bearers.
4. More trees should be retained on precipitons, broken ground and in areas liable to severe Erosion.
5. Compact groups of vigorously growing pole crop having a diameter upto 30 cms and density not less than 0.7 should be retained as a part of the future crop.
6. Thinnings are to be carried out in these groups.
7. Final fellings are done only when the young crop is beyond injury.
TREATMENT OF FELLED PERIODIC BLOCK I AREAS
The following scheme of operations is followed for such areas:
i. A detailed regeneration survey is carried out.
ii. All poles, saplings, seedlings having a suppressed and stunted growth and poor density (less than 0.5) and less than 0.25 hectares in areas are removed.
iii. Undesirable species of the understorey which is hampering the growth of Deodar seedlings is removed.
iv. Broad-leaved species may be encouraged in moist locations.
SUBSIDIARY SILVICULTURAL OPERATIONS IN PERIODIC BLOCK I AREAS
They comprise of:
(a) Dead, damaged, diseased trees are removed, so as to reduce competition.
(b) The felling debris is suitably disposed so that there is clear bed.
(c) Tree which are not valuable, less valuable and interfering with the growth of Deodar are removed to reduce competition.
(d) Shrub cutting is done in areas where it is fairly dense.
Ø Regeneration in Periodic Block I is obtained Naturally and Artificial means.
· Artificial Regeneration:
i. About 1 to 2 year old deodar seedlings raised in a nursery are planted during monsoon or winter rains.
ii. Pits of 30 cm x 30 cm x 30 cm size are dug, well in advance of the planting.
iii. The spacing adopted varies from 2.5 mt x 2.5 mt or 3 mt x 3 mt.
· Light thinnings are carried out in Periodic Block III & Periodic Block IV as per requirement if needed.
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