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In the following example, a maize breeder is planning to measure the height of 5 plants per plot at maturity.
Click Actions > Observation unit options > Create sub-observation units. Select Plants as the sub-observation units.
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Give the sub-observation data set a unique name. Specify 5 plants per plot. Leave PLANT_NO as the default numbering variable. Choose to sub-sample all study locations and Save.
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Select Click Add to add plant level trait details.
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In this sub-observation dataset, plant and ear heights (cm) will be measured from 5 representative plants in each plot. Each plant in the sub-observation dataset receives a unique OBS_UNIT_ID (see above for more info) suitable for barcoding individual plants within the plot.
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In the following example, a maize breeder is planning to gather ears of interest from experimental plots to take ear-specific measurements. The breeder doesn't know in advance how may many ears will be collected, but expects to collect no more than 7 per plot.
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Give the sub-observation data set a unique name.
Specify 7 ears as the maximum collected per plot.
Choose a numbering variable. In this case, Obs_NO. Note: custom sub-observations units will not have a corresponding numbering variable of Observation unit type until you create one in Manage Ontologies (see details below).
Choose to sub-sample both study locations.
Save.
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