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Acknowledgements
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Background
Sensors
pH Probe Assembly
pH Probe Calibration
Teaching Materials
Acknowledgements
Acknowledgements
Grass Growing on Humus courtesy
Edafologia2.0
, 2016.
Tynes, M. (2015).
www.mastercomposter.com
. Retrieved August 7, 2017.
http://compost.css.cornell.edu/science.html
http://www.organicgardening.com/learn-and-grow/compost-questions