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Appendices: Appendix K. Hula Hoop Method for Determining Plant and Pest Populations

Author: OMAFRA Staff
Creation Date: 20 May 2009
Last Reviewed: 20 May 2009

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Pub 811: Agronomy Guide > Appendices > Appendix K. Hula Hoop Method for Determining Plant and Pest Populations

Excerpt from Agronomy Guide for Field Crops
Order OMAFRA Publication 811: Agronomy Guide for Field Crops

 

Inside Diameter
of Hoop in Centimetres
(inches)		 Square Area in
Metre2
(ft2)

Factor by Which to Multiply
the Number of Plants
Within the Hoop to Equal:
Plants per Hectare Plants per Acre
91 (36)
0.65 (7.0)
15,385
6,165
84 (33)
0.55 (6.0)
18,182
7,334
76 (30)
0.45 (4.9)
22,222
8,874
69 (27)
0.37 (4.0)
27,027
10,956
61 (24)
0.29 (3.2)
34,483
13,865

 

Inside dimensions of a square frame in centimetres (in.)

Inside Diameter
of Hoop in Centimetres
(inches)		 Square Area in
Metre2
(ft2)		 Factor by Which to Multiply
the Number of Plants
Within the Hoop to Equal:
Plants per Hectare Plants per Acre
50 x 50 (20 x 20)
0.25 (2.7)
40,000
16,133
100 x 100 (40 x40)
1.00 (11.1)
10,000
3,924

Count the number of plants that are found within the hoop or square and multiply that number by the pre-determined factor listed above to determine plant population per hectare or acre.

 

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