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Chlorophyll meter is a device that is introduced as a small portable handheld device.

Which is used for fast measurements. We have to close the device with the end of the clip which is at the top of the device on the leaf of our plant.

Within 1-2 seconds, the relative amount of chlorophyll (SPAD index) calculated from the ratio of red to infrared light passed through the leaf provides that to determine whether plant metabolism in a given medium relative to the reference value for a species or cultivar Works well, used.

The higher the control value, the weaker the plant. This device is often used to diagnose the need for nutrients because the chlorophyll content is related to the plant’s nitrogen content. The advantage of the device is that there is no need to remove the leaves from the plant (non-invasive method)