9 scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signaling, supervision, life-saving and teaching apparatus, instruments and electronic sensors, namely, instruments and sensors for measuring the chlorophyll content in plants, apparatus, instruments and sensors for measuring the fertilizer content of the soil, instruments and sensors for measuring precipitation and instruments and sensors for measuring the content of minerals in the soil; computer data processing hardware and computer software for controlling and regulating the dispersion of fertilizers; equipment for measuring, dosing and mixing of gases and fluids, namely, software for measuring, dosing and mixing of gases and fluids, electronic control panels, electronic sensors for measuring gases and fluids, automatic fertilizer injection devices that automatically inject a predetermined proportion of fertilizer fluids into an irrigation system; flow meters, flow and pressure switches for monitoring and controlling the flow of gases or liquid, pressure indicators and regulators for gas installations, and automatic metering valves with gas leak warning features; gas detectors for detecting the presence of gas; manometers; apparatus for recording, transmission or reproduction of sound or images; computer software, namely, software for measuring crop nitrogen requirements, software for measuring, varying and distributing of fertilizers, software for measuring chlorophyll content in plants, software for measuring fertilizer content of the soil, software for measuring the content of minerals in the soil, and software for measuring, dosing and mixing gas and fluids; computer application software for mobile phones and other portable electronic devices, namely, software for gas tank mixture and gas tank mixability identifications; computer software for measuring, dosing and mixing of gas and fluids