Patent ID: 9075008
Filing Date: 2015-07-07
Classification: G01J,G01N

Abstract:
1. A method of treating plants, comprising: measuring optical properties of a plant using at last three spectral bands; calculating in a computational device at least two difference vegetative indexes using the optical properties, each of the at least two vegetative indexes correlating to one or more plant growth parameters; calculating in the computational device a water invariant chlorophyll index from the at least two difference vegetative indexes using the at least three spectral bands; and treating one or more of the plants based on the water invariant chlorophyll index; wherein the water invariant chlorophyll index comprises a ratio of two of the difference vegetative indexes each using the at least three spectral bands and wherein the difference vegetative indexes and the at least three spectral bands are selected to minimize effect of water stress when making a chlorophyll type measurement.