Quality System Procedure 142.1: Pedigreed Seed Crop Inspection Procedures - Appendices
Appendix III: Count Area Calculation

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The table below should be used to establish a count area for the detailed inspection. Inspectors must perform the area counts for the crops they inspect. The table shows the area that will contain approximately 10,000 plants when the number of plants per metre of row and the row spacing are known.

Approximate Area (in the nearest square metre) Required for 10,000 Plants as Determined by Plant Population and Row Spacing

Average No. of plants per metre of rowDistance between rows 15 cm (6")Distance between rows 18 cm (7")
16.593108
188498
19.57790
21.57283
236678
24.56272
265868
285564
29.55260
314957
334654
34.54452
364249
37.54047
39.53945
413743
42.53642
443440
463339
47.53237
493136
52.52934
55.52732
592630
62.52429
65.52327
692226
722125
75.52024
78.51923
821922
83.51821
88.51720
921719
951619
98.51618
101.51517
1051417
1081416
111.51416
1151316
1181315
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