Ministry
of Forests

Seedling Stock Specifications for Commercial Forest Nursery Contracts (Applicable to 2005 Seedling Requests)

 

File: 18500-03/2005

GENERAL SPECIFICATIONS

  • Seedlings- shall be free of any diseases, insects, chlorosis or mechanical damage.

    Shoots - shall not have forked tops without a clearly dominant leader, ie. the leader shall have dominance of at least 2.5 cm;

    - shall not be forked from the base.

    Buds - in those species that form terminal buds, the terminal buds must be visible and viable.

    Roots - seedlings with sparse or deformed root systems shall be culled out;

    - seedlings shall have a sufficient amount of roots to make an extractable plug and to be in balance with the foliage;

    - root dry weight targets of no less than 500-600 mg (313B) and 700-800 mg (415B) are recommended as a guide for indicating plug cohesion and extractability.

    •

    • Stocktypes: Containers:

    PSB Plug Styroblock 211A 240 cavities per block
    PCT Plug Copper Treated 313A 198 cavities
    PAP Plug Air Pruned 313B 160 cavities
    PBR Plug / Bareroot Transplant 415B, 410, 412B 112 cavities
    PPT Plug to Plug Transplant 412A, 415D 77 cavities
    BBR Bareroot 515A, 512A 60 cavities
    BRL Bareroot Large 615A 45 cavities
    CRC Rooted Cutting 615B 28 cavities

     

     

     

    Last Revision: March 17, 2005

     

    Species Stock Type
    1+0

    Height (cm)

    R.C.D. (mm)

     
        Cull Target Max (2) Cull Target
    Alder (Dg, Dr), PSB410

    13

    20

    --

    2.4

    3.2
    Alder, Sitka (Alnucri), PSB415B

    15

    23

    --

    2.6

    3.4
    Aspen, Trembling (At) PSB412A

    15

    23

    --

    2.7

    3.6
    Birch (Ep) PSB415D

    20

    30

    --

    2.8

    3.7
      PSB515A

    23

    34

    --

    3.3

    4.2
      PSB615A

    25

    40

    --

    4.0

    5.5
                 
    Cedar, Western Red (Cw) PSB313B

    14

    22

    30

    2.0

    2.4
      PSB410

    16

    25

    35

    2.2

    2.8
      PSB415B

    18

    29

    40

    2.4

    3.2
      PSB412A

    18

    30

    42

    2.5

    3.4
      PSB415D

    20

    33

    46

    2.7

    3.9
      PSB512A

    20

    35

    50

    2.8

    4.0
      PSB515A

    20

    35

    50

    2.9

    4.2
      PSB615A/615B

    30

    45

    60

    3.2

    4.5
                 
    Cedar, Yellow (Yc) PSB/CRC313B

    12

    21

    30

    2.0

    2.5
      PSB/CRC410

    13

    22

    32

    2.2

    2.8
      PSB/CRC415B

    17

    26

    35

    2.4

    3.2
      PSB/CRC412A

    17

    26

    35

    2.5

    3.3
      PSB/CRC415D

    20

    30

    40

    2.6

    3.5
      PSB/CRC512A

    20

    32

    44

    2.8

    3.7
      PSB/CRC615A

    30

    40

    50

    3.5

    4.0
                 
    Douglas-fir, Coast (Fdc) PSB313B

    12

    19

    26

    2.4

    3.0
      PSB410

    16

    25

    34

    2.6

    3.2
      PSB415B

    18

    28

    38

    2.8

    3.3
      PSB412A

    18

    30

    42

    3.0

    3.7
      PSB415D

    20

    35

    50

    3.2

    4.2
      PSB512A

    20

    35

    50

    3.3

    4.4
      PSB515A

    25

    40

    55

    3.4

    4.6
      PSB615A

    30

    45

    60

    3.5

    4.8
                 
    Douglas-fir, Interior (Fdi) PSB/PCT313B

    12

    18

    25

    2.3

    3.0
      PSB/PCT410

    13

    20

    28

    2.6

    3.2
      PSB/PCT415B

    15

    22

    30

    2.8

    3.5
      PSB/PCT412A

    15

    24

    34

    3.0

    3.6
    Douglas-fir, Interior (Fdi) PSB/PCT415D

    15

    27

    40

    3.2

    4.0
      PSB/PCT512A

    15

    27

    40

    3.3

    4.2
      PSB/PCT515A

    15

    28

    42

    3.4

    4.4
      PSB/PCT615A

    15

    30

    44

    3.5

    4.6
                 
    Fir, Amabilis (Ba) PSB313B

    9

    17

    25

    2.2

    2.7
      PSB410

    10

    19

    28

    2.4

    2.8
      PSB415B

    11

    20

    30

    2.5

    3.0
      PSB412A

    11

    20

    30

    2.7

    3.2
      PSB415D

    13

    25

    36

    3.0

    3.5
      PSB512A

    13

    26

    38

    3.2

    3.7
                 
    Fir, Grand (Bg) PSB313B

    12

    20

    28

    2.3

    2.8
    Fir, Noble (Bn) PSB410

    14

    23

    33

    2.5

    3.2
      PSB415B

    15

    25

    35

    2.7

    3.4
      PSB412A

    16

    30

    44

    3.0

    3.7
      PSB415D

    20

    33

    46

    3.1

    3.8
      PSB615A

    25

    40

    55

    3.7

    4.4
                 
    Fir, Subalpine (Bl) PSB313B

    7

    12

    22

    2.0

    2.5
      PSB410/415B

    7

    17

    27

    2.3

    2.8
      PSB412A

    8

    19

    30

    2.6

    3.2
                 
    Hemlock, Mountain (Hm) PSB313B

    12

    19

    26

    2.2

    2.8
      PSB410

    12

    20

    28

    2.3

    2.9
      PSB415B

    14

    22

    30

    2.5

    3.0
      PSB412A

    15

    23

    31

    2.5

    3.1
      PSB415D

    16

    24

    32

    2.6

    3.2
                 
    Hemlock, Western (Hw) PSB313B

    12

    20

    28

    2.2

    2.8
      PSB410

    12

    20

    28

    2.3

    2.9
      PSB415B

    15

    25

    35

    2.4

    3.0
      PSB412A

    15

    25

    35

    2.6

    3.3
      PSB415D

    18

    26

    35

    2.8

    3.5
      PSB512A

    18

    26

    35

    3.0

    3.6
      PSB515A

    18

    28

    38

    3.1

    3.7
                 
                 
                 
    Larch, Western (Lw), PSB313B

    10

    17

    24

    2.2

    2.8
    Larch, Siberian (Ls), PSB410

    12

    20

    28

    2.5

    3.0
    Tamarack (Lt) PSB415B

    14

    22

    30

    2.6

    3.2
      PSB412A

    14

    23

    32

    2.8

    3.3
      PSB415D

    15

    27

    40

    3.0

    3.5
      PSB512A

    15

    27

    40

    3.2

    3.7
                 
    Pine, Lodgepole (Pli) (Plc) * PSB/PCT211A

    6

    11

    16

    2.2

    2.5
    Pine, Ponderosa (Py) PSB/PCT313B **

    6

    12

    19

    2.4

    2.8
    Pine, White (Pw) PSB/PCT410

    7

    13

    20

    2.6

    3.2
      PSB/PCT415B

    8

    14

    21

    2.7

    3.3
      PSB/PCT412A

    8

    15

    22

    2.8

    3.4
      PSB/PCT415D

    8

    15

    23

    3.0

    3.6
      PSB/PCT512A

    9

    16

    24

    3.1

    3.7
      PSB/PCT615A

    10

    18

    26

    3.4

    4.0
                 
    Spruce, Sitka and Crosses PSB313B

    14

    22

    30

    2.2

    2.6
    (Ss, Sxs) PSB410

    16

    25

    35

    2.4

    3.0
      PSB415B

    17

    27

    37

    2.6

    3.2
      PSB412A

    17

    28

    38

    2.8

    3.5
      PSB415D

    18

    29

    40

    3.0

    3.8
      PSB512A

    20

    34

    48

    3.3

    4.3
      PSB515A

    22

    36

    50

    3.4

    4.4
      PSB615A/615B

    30

    45

    60

    3.8

    4.8
                 
    Spruce, White/Engelmann PSB/PCT313B

    11

    18

    25

    2.4

    3.0
    & Crosses (Sx, Se, Sw, Sxw) * PSB/PCT410

    12

    19

    27

    2.6

    3.2
      PSB/PCT415B

    13

    20

    32

    2.8

    3.5
      PSB/PCT412A

    13

    24

    35

    3.0

    3.7
      PSB/PCT415D

    14

    27

    40

    3.2

    4.0
      PSB/PCT512A

    14

    27

    40

    3.3

    4.2
      PSB/PCT515A

    16

    28

    42

    3.4

    4.5
      PSB/PCT615A

    20

    35

    50

    3.8

    4.8

    Note: (1) These figures are all ABSOLUTE.

    (2) If stock is at or above maximum height it may be accepted if it has an R.C.D. equivalent to the target specifications.

      1. If there is a discrepancy between these listings and the Schedule 'A' of the nursery contract, the Schedule 'A' will be deemed correct.
      2. * Note: All 1+0 summer plant seedlings (seedlings lifted for immediate planting from June 1 through August 31) will have Root Collar Diameter (RCD) cull and target specifications reduced by 0.2 mm.
        **Pli 313B not recommended
    Species Stock Type
    2+0

    Height (cm)

     

    R.C.D. (mm)

     
        Cull Target Max. (2) Cull Target
    Cedar, Yellow (Yc) PSB/CRC415B

    18

    22

    35

    3.5

    4.5
      PSB/CRC615A

    30

    45

    60

    4.0

    4.8
                 
    Fir, Amabilis (Ba) PSB410

    12

    22

    32

    3.2

    4.0
      PSB415B

    14

    25

    36

    3.4

    4.4
      PSB412A

    14

    26

    38

    3.5

    4.5
      PSB415D

    16

    29

    42

    3.8

    4.8
      PSB615A

    16

    30

    45

    4.0

    5.0
                 
    Fir, Grand (Bg) PSB415B

    15

    27

    40

    3.4

    4.2
    Fir, Noble (Bn) PSB415D

    20

    35

    50

    4.0

    4.6
      PSB615A

    25

    40

    55

    4.2

    5.0
                 
    Fir, Subalpine (Bl) PSB410

    8

    19

    30

    3.2

    4.0
      PSB412A

    8

    19

    32

    3.3

    4.3
      PSB415B

    8

    20

    32

    3.4

    4.5
      PSB415D

    10

    23

    36

    3.8

    5.0
                 
    Pine, Lodgepole (Pli) (Plc), PCT/PSB415B

    12

    25

    35

    3.6

    4.8
    Pine, White (Pw) PCT/PSB412A

    12

    25

    35

    3.8

    5.0
      PCT/PSB415D

    14

    25

    35

    4.0

    5.3
      PCT/PSB615A

    14

    25

    36

    4.3

    5.6
                 
    Spruce, White/Engelmann PSB415B

    14

    27

    40

    3.6/4.0**

    4.8/5.0**
    And Crosses (Sx, Se, Sw, Sxw) PSB412A

    15

    29

    40

    3.7/4.1**

    4.9/5.3**
      PSB415D

    16

    30

    44

    4.0/4.4**

    5.3/5.7**
      PSB512A

    16

    31

    46

    4.1/4.5**

    5.4/5.8**
      PSB515A

    17

    32

    47

    4.2/4.6**

    5.5/5.9**
      PSB615A

    20

    35

    50

    4.5/5.0**

    6.0/6.5**

    Note: (1) These figures are all ABSOLUTE.

    (2) If stock is at or above maximum height it may be accepted if it has an R.C.D. equivalent to the target specifications.

    (3) Please note that if there is a discrepancy between these listings and the Schedule 'A' of the nursery contract,

    the Schedule 'A' will be deemed correct.

  • ** Note: The smaller number is the specification applied to stock lifted from June 1 to September 14 of the second year (2+0 SU). The larger number applies to stock lifted after September 14 (2+0 SP). Note that 2+0 spring plant stocktypes are not recommended for spruce species.
    •

    •