Resources and extra info

General or very broad resource places:
http://www.uq.edu.au

Slide 17 - Gericke

A fantastic 15 minute film on his research - from the 30s
https://www.youtube.com/watch?v=iIAqF1Xbgs0

Slide 27 - NASA CELSS

The NASA spinoff
https://spinoff.nasa.gov/Spinoff2010/er_1.html

Slide 31 - GE Mirai farm

National Geographic article
http://news.nationalgeographic.com/news/2014/07/140717-japan-largest-indoor-plant-factory-food/

Slide 34-37
The roots, three parts, the bottom part likes water, the top part likes air, all parts need oxygen for exchange of gases and all part os the roots need darkness.

Slide 40-43 - The water
The water is important, you need to take notice to what is in the water to begin with. Measure EC and pH in the water before adding nutrients, and during your growing period.

Slide 42 - pH
Too high or too low pH will lock out some nutrients from the plants. 
pH correction is often an issue important in industrial waste treatment, and off for pool owners =)

Links to project with automatic pH correction
https://www.youtube.com/watch?v=t44qGxZ0oHs
http://www.simplyhydro.com/free6.htm

Slide 43 - EC TDS
EC measures the precense of nutrients in the water (amount of ions (dissolved salts) it can NOT measure what nutrients are there. To do this you need some kind of spectral analysis, there is a tool called colorimeter that might be useful. it is as far as I know not available to anything but a VERY professional price. 

A very fast explanation of the differences
https://www.youtube.com/watch?v=uI9D-ONNdHg

Conversion between PPM and EC
http://www.lenntech.com/calculators/conductivity/tds-engels.htm

Slide 54 - PAR value

PAR value explained
http://www.osmobot.com/blog/what-is-par-and-why-should-you-care

A commercial site but with some lamp types and expected PAR values
http://www.horizenhydroponics.com/Plant_Grow_Lights_PAR_Testing.html

Slide 56 - Light

A resource on light spectrum and lamp types
http://howtogrowmarijuana.com/wp-content/uploads/2011/01/marijuana-cannabis-grow-light-spectrum.jpg

Slide 64 - NFT

NFT - automated
https://hackaday.io/project/2822-fully-automated-nutrient-film-hydroponics