Leaf Porometer Operator’s Manual
3. The Menus
18
4. Repeat this until you reach the last character. If you wish
to stop before the end, you will still have to press Enter
until you reach the end of the row.
Averaging Readings
A leaf ’s stomatal conductance depends on the amount of
shade and sunlight it receives, the age of the leaf, and its
position on the plant. To obtain a plant’s stomatal conduc-
tance average, you must take a variety of readings from dif-
ferent positions on the plant. The average is proportional to
the type of readings taken. For example, if you know your
plant receives 70% sunlight, you might consider taking
seven readings from the sunny part, and three from the part
in the shade.
You can also obtain the average readings for a field of
plants. For example, if you had a field of corn, you might
decide to take a reading from the third leaf from the top on
each stalk of corn on that particular plot. These readings
together would give you the average for that field.
Measurement Troubleshooting
If the following screen appears before starting a reading:
