Is this edible?

[Cooper horn]

We have some big agave cacti and yucca in our front yard and I was wondering if they were edible? Any input is appreciated.

 

[wellington]

Both safe in moderation
https://www.thetortoisetable.org.uk...actwords&searchtxt=Yucca&x=0&y=0#.WxR-V0FOnv4

 

[Cooper horn]

Thank you