SCREEN APERTURE SIZE FOR SEED PROCESSING 

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S.No               Crop                                             Screen sizes in millimeters

                                                                            Top                          Bottom

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Cereals

1.        Barley:

            2 rowed                                                   6.50 r                       2.30 s

            6 rowed                                                   6.50 r                       2.10 s, 2.20 s

2.        Paddy                                                       2.80 s, 9.00 r            1.80 s, 1.85 s

3.        Wheat

            T.aestivum                                               6.00 r                        1.80 s, 2.10 s, 2.30 s

            T.duram                                                  6.00 r,                       2.10 s, 2.30 s

4.        Triticale                                                    6.00 r, 7.00 r             2.10 s, 2.30 s

Millets

1.        Maize except popcorn                              10.50 r, 11.00 r        6.40 r, 8.00 r

2.        Popcorn                                                    8.75 r                      4.25 r, 4.75 r

3.        Sorghum                                                   4.75 r                      2.10 s, 3.50 r

4.        Pearl millet                                                3.25 r                      1.30 r, 1.30 s, 1.40 r                                                                                                                                 1.40 s, 1.60 r, 1.90 r

5.       Barnyard millet                                           3.25 r                      1.40 s, 1.80 r

6.       Common millet                                           3.80 r                      1.60 s  

7.       Finger millet                                               3.25 r                       1.40 s

8.       Italian millet                                               3.25 r                       1.20 s, 1.30 r  

9.      Kodo millet                                                3.80 r                       1.60 s, 2.00 r

10.    Little millet                                                  2.50 r                       1.60 r

Pulses

1.     Blackgram                                                  5.00 r                       2.80 s

2.     Bengalgram                                                 9.00 r, 10.0 r            5.00 r, 5.50 r, 6.00 r

3.     Cowpea                                                      7.00 r                       3.50 r, 4.00 r

4.     Greengram                                                  5.50 r                       2.80 s, 3.20 s

5.     Indian bean (Sen)                                        8.75 r                       4.75 r

6.     Lentil                                                           7.00r                       3.20 s, 4.00 r, 4.75 r

7.    Pigeon pea (Arhar)                                       9.50 r                      3.20 s, 4.00 r, 4.75 r

8.    Rajmash (Frenchbean)                                 11.00 r                     4.75 s  

Oilseeds

1.    Castor                                                         13.50 r                       4.40 s

2.    Indian Rape seed & Mustard                       2.75 r, 3.00 r,3.25 r    0.90 s, 1.00s, 1.10 s, 1.40 r

3.    Linseed                                                        4.00 r                         2.00 r

4.    Niger                                                           3.20 r                         1.20 s

5.    Rocket salad (Taramira)                               3.20 r                         1.10 s, 1.20 s

6.    Safflower                                                     7.25 r                         1.20 s

7.    Sesame                                                        2.40 r                        1.60 r, 1.90 r  

8.    Soyabean                                                     8.00 r                        4.00 s

9.    Sunflower                                                     9.00 r                        2.40 s

Fibres

1.    Cotton 

        Fuzzy                                                          14.30 r                       5.20 s  

        Delinted                                                        7.20 r                       3.90 s

2.    Jute

       Capsularis                                                      2.40 r                       1.20 r, 1.60 r

       Olitorius                                                         2.00 r                       0.80 r, 1.00 r

Forages

1.    Berseem

       Diploid                                                          2.00r                         1.00 s

       Tetraploid                                                      2.40 r                        1.20 s

2.    Forage sorghum                                            4.00 r, 4.75 r              2.10 s

3.    Guar (Cluster bean)                                       6.00 r                         1.80 s

4.    Guinea grass                                                  2.10 r                         2.40 x 0.65 m

5.    Indian clover (Senji)                                       2.10 r                         2.40 x 0.80 m

6.    Lucerne                                                         2.50 r                         0.70 s, 0.70 x 1.70 m

7.    Oats                                                              7.50 r                         2.00 s

8.    Setaria grass                                                  2.40 r                         1.90 s

9.    Sudan grass                                                    4.00 r                         1.20 s, 1.30 s

Vegetable crops

Cucurbits

1.   Ashgourd                                                         9.50 r                          6.40 r

2    Bittergourd                                                     11.00 r                          6.50 r

3.    Bottle gourd                                                  11.00 r                          6.50 r

4.    Cucumber                                                      8.00 r                            2.00 r, 2.50 r

5.    Indian squash                                                 9.50 r                            6.40 r

6.    Long melon                                                    5.00 s                            1.00 r

7.    Musk melon                                                   5.00 r                            1.00 r

8.    Pumpkin                                                       11.00 r                            6.50 r

9.    Ridgegourd                                                     9.50 r                            6.40 r

10.  Snake gourd                                                   9.50 r                            6.40 r

11.  Snapmelon                                                      5.00 s                           1.00 r

12.  Sponge gourd                                                  9.50 r                           6.40 r

13.  Summer squash                                               8.00 r                            2.00 r

14. Watermelon                                                     6.00 r                            1.80 s  

Fruit vegetables

1.    Brinjal                                                            4.00 r                            0.80 s  2.10 r

2.    Capsicum (Sweet pepper)                              4.00 r                            0.80 s, 2.10 s

3.    Chilli (Hot pepper)                                         4.00 r                            0.80 s 2.10 r

4.    Okra (Bhindi)                                                 6.00 r                            4.30 r

5.    Rat-tail Radish                                                4.50 r                            2.00 r 

6.    Tomato                                                          4.00 r                            0.80 s 2.10 r

Greens/Leafy vegetables

1.    Asparagus                                                     6.00 r                             2.40 r

2.    Celery                                                           1.80 r                             0.40 s, 0.65 x 0.65 m

3.    Fenugreek (Methi)

       Large & Medium                                           3.25 r                             1.20 s

       Small                                                             2.10 r                             0.69 x 0.69 m

4.    Lettuce                                                          2.30 r                             0.80 r

5.    Parsley                                                          2.75 r                             0.75 s

6.    Spinach beet                                                 5.50 r                             2.75 r

7.    Spinach

       Round seeded                                               5.00 r                             2.75 r

       Sharp seeded                                                8.00 r                             2.50 r

Cole crops

1.    Cabbage                                                        2.75 r                             0.90 s  

2.    Cauliflower                                                     2.75 r                             1.10 s

3.    Broccoli                                                         2.75 r                              1.10 s

4.    Chinese cabbage (Heading & non heading)     2.75 r                              0.90 s

5.    Knol-knol                                                       2.75 r                             1.10 s  

Bulb crops

1.    Onion                                                             3.80 r                             2.00 r

Root crops

1.    Carrot                                                             2.30 r                             1.00 r  

2.    Celeriac                                                           1.80 r                             0.40 s, 0.65 x 0.65 s

3.    Sugarbeet

       Monogerm                                                       9.00 r                             3.00 r

       Multigerm                                                        9.00 r                              2.50 s

4.    Gardenbeet                                                     9.00 r                              3.00 r

5.    Radish                                                             4.50 r                              2.00 r

6.    Turnip                                                             1.80 r                               1.20 r

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r = Screen with round perforations.

s = Screens with slotted (oblong) perforations.

m = Wiremesh sieves.