Pioneer Technical Insight
 330
MEASURING MAIZE PLANT POPULATION
WHY MEASURE PLANT POPULATION?
Plant population may be measured to determine the accuracy of planting and to determine the magnitude of population loss due to flooding, insect pressure or animal damage.
HOW TO MEASURE PLANT POPULATION
1. Determine the length of a row that must be measured. The length of row per acre or hectare varies depending on the row spacing. The conventional row spacing is 30’ (76.2 cm). The narrower the row spacing, the longer the length of row per hectare. The amount of row that must be measured to give one thousandth of an acre is shown in Table 1.
Table 1: Length of row per thousandth of an acre for a range of row spacings
* To convert measurements to a per hectare basis, multiply by 2.471.
2. Draw a line across all the planter rows (e.g. for a six row planter, place a line across six rows). Measure the amount of distance to give 1/1,000th of an acre (Table 1) and draw another parallel line across the same six rows.
3. Count the number of plants between the two lines for each of the rows. Determine the average plant population by adding together the total number of plants per row and dividing by the number of rows that were measured.
APPROXIMATE SEED SPACINGS
The following table gives the approximate spacing between seeds for a range of planting populations.
Table 2: Seed spacings (cm) for a range of row widths and planting populations
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The information in this publication is general in nature only. Although the information in this publication is believed to be accurate, no liability (whether as a result of negligence or otherwise) is accepted for any loss of any kind that may arise from actions based on the contents of this publication.
© 2010, Genetic Technologies Limited. No part of this publication can be reproduced without prior written consent from Genetic Technologies Limited.
Revised: May 2010
Expires: September 2012
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