Methodology for irrigation water uptake time estimation based on RGB colorimetric measurements of leaves (A visual-graphical observation)

Abstract

Abstract In the form of a sequence of actions, in a laboratory set of experiments, a methodology for measuring the absorption time of the irrigation water from greenhouse tomato plants is proposed. Based on pure scientific observation, before the actual measurements and during the experiment, a hypothesis is put forward, that in the experiment’s particular environmental conditions and this tomato variety, the water moves to the top of a plant for 1 to 2 hour (there is lack of information and measurements in this matter). Based on the same pure scientific observation was found, that the drier leaves darken and after the watering, they become lighter-green, which was later proven by the colorimetric measurements. It was also observed noticeable fading of leaf veins by watered plants, they become brighter, more protruding and are enlarged. After the experiment, it has been proven that water uptake time is 1 hour per 1-meter high plant and 1:30 hours water to be absorbed to the top of 1,60-meter high plant in described laboratory conditions. This is proven by leaves color lightening and the noticeably protruding of leaves veins.