Nursery Techniques - Afforestation, Reforestation and Forest Restoration in Arid and Semi-arid Tropics - page 29

10,000

6,000

5,400 5,400 5,130

Fig. 2.9 Example of losses at different stages in plant production in nursery

Table 2.3 Typical plant material loss factors in different methods of plant production in a nursery
Type of Loss

Production method (see Fig. 2.8 )
C1 C2 C3 C4 F1 F2 F3

Propagation loss ( p ) 0 0 0 40 0 0 40

Loss in beds or
fields ( l )

20 25 30 5 10 20 10

Loss due to grade
out ( g )

20 20 20 0 20 20 0

Loss in
transportation ( t )

5 5 5 5 5 5 5

Final yield from 100 60.80 57.00 53.20 54.15 68.40 60.80 51.30

Production ratio ( r ) 1.64 1.75 1.88 1.85 1.46 1.64 1.95

production must be planned for extra plants to take care of various loss factors
(Fig. 2.9 , Table 2.3 ). Keeping this in view, the plant production targets should be
fixed for each species. Plants to be raised over more than 1 year will repeat in the
annual production figures of the successive years. Table 2.4 shows a sample of the
final version of the production plan of a central nursery.
A production plan must lay down the exact number of plants to be raised by each
method. Plants can be raised for bare-root or containerised transport, through stump
cuttings or branch cuttings, grown for 3 months, 6 months, or 1 year. Looking at
these, one has to work out requirement of quantity of seeds, number of cuttings
and their source, growing space in mother beds, number of containers required for
sowing, potting and repotting, area of germination beds, quantity of potting mix, and
other related resources.