Changes

Manuals, videos, and links
* Manual: [http://www.bebuffered.com/downloads/sussman_contour_trenches.pdf Design Manual: Contour Trenches] - Using the "A" frame and how to make a contour trench.
* Large wiki on water use for agriculture: [http://web.archive.org/web/20151025174729/http://agropedia.iitk.ac.in:80/ Agropedia]
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