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How to make a measurement
1 .
Choose a plant in the right
growth stage (~BBCH 30 - 51).
The N-recommendations provided
by Yara are only valid for certain
crops and development stages.
Check the Yara app for more
information.
Tip: Make sure that the field has
enough sulfur. A lack of sulfur
will change the leaf color and the
N-Recommendation provided
might not be correct.
Tip: When measuring, avoid any
atypical areas of the field (e.g.
areas with distinctly different soil
properties, such as sand banks or
similar).
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2 .
Choose the youngest fully
developed leaf from your plant to
make a measurement.
Avoid grained or thick points of the
leaf, leaves with visible drought
stress or leaves rolled together.
3 .
Place the leaf inside the
measuring head, using the center
line as a reference to place the
leaf. The lens must be covered
completely. If necessary, the leaf
stopper can be moved a little to
adapt to the width of the leaf.
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