Drip Irrigation

https://en.wikipedia.org/wiki/Drip_irrigation
http://www.leevalley.com/en/Wood/page.aspx?cat=2,2280&p=49657
http://www.thisoldhouse.com/toh/how-to/intro/0,,1088902,00.html
https://thewatermovement.wordpress.com/tag/drip-irrigation/

Video
https://www.youtube.com/watch?v=SSHimq_J33I