This glossary provides definitions of important terms used in the descriptions of ISciences' capabilities and products.

Evapotranspiration deficit is the difference between the amount of water that would be transpired or evaporated if water supply was unlimited (potential evapotranspiration), and the amount of water that is actually transpired or evaporated (estimated from temperature, precipitation, change in soil moisture, and soil characteristics). Large values relative to the norm indicate likely vegetative stress unless the difference is made up using irrigation.

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