An Automatic Soil Testing Machine for Accurate Fertilization

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2019
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In this paper the aim is to propose a research and development project to prepare device that can test sample of soil from the field and testing the sample will give suggestion about required amount of fertilizer. The device will work as a datasheet for the users. In the soil sample our device will measure level of different nutrient in the soil NPK values using the Beer's law method. An Arduino is used for microcontroller. Different light colors light up watery soil solution under test. Light gets bounce back from solution. It depend upon its absorbent reflectance of soil. Reflected light is received by another Light Depending Resistor (LDR) which is converted into electrical signal. With Help from Microcontroller our device can measure soil nutrients.
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Electrical and Computer Engineering
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North South University
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