Aiyappa M.N and et.al <br/><br/>
IOT based soil NPK level, temperature, moisture and PH detection and analysis system using solar energy 

 - Ponnampet  Coorg Institute of Technology  2022 
<br/><br/><label>Subjects--Personal Names: </label><br/>Electronics and communication engineering
<br/><br/><label>Dewey Class. No.: </label>621.381 AIY