Anchor knot.

What is a good knot for securing an anchor line to an anchor?

Best to have the line attached to a short section of chain and the chain attached to the anchor with a shackle that has its pin wired so it cannot work itself loose. You will get triple the holding power with the length of chain.

yep. even just a foot of chain helps. you want the anchor to lay on its side and pull more horizontal the straight up or at a steep angle.

 

I use a bowline(?) it creates a nice loop that wont come loose.  And yes a length of chain.

Bowline.  At least 3x the water depth in anchor line.

I have used  chain and a Palomar knot and it worked great.  Easy to tie and it stays tied.

Anchor Bend:

http://www.netknots.com/rope_knots/anchor-bend/

Anchor Bend:

http://www.netknots.com/rope_knots/anchor-bend/

+1 Works well with paracord too!

Eye splice and chain.  Shackle to line and also anchor (wired)

You don't need a chain with a kayak. Just more of a mess. I have never used a chain and have held fast on a 7ft outgo. Large deployable anchor with a 5lb plug attached to it at the bottom. Bowline.

I've never used a chain when I anchor my kayak either.
Huge outgo in San Pablo several times. No problems.

I've never used a chain either.  I use parachord tied to bottom of anchor then fastened to the top using zip ties or wire tires....this way when it gets caught I don't have to go swimming!  Just give it a couple hard yanks and the zip tie will break pulling anchor up from bottom!  Presto....unstuck!  I've only anchored a few times...really don't get used that often.

I've never used a chain either.  I use parachord tied to bottom of anchor then fastened to the top using zip ties or wire tires....this way when it gets caught I don't have to go swimming!  Just give it a couple hard yanks and the zip tie will break pulling anchor up from bottom!  Presto....unstuck!  I've only anchored a few times...really don't get used that often.

Yep. Works like a charm.

A line splice will work wonders, as will most good knots.
As for the chain and digging, that would depend on if you are anchoring in current. If not, weight is more important than blade, and probably wont need as much rope.
When anchoring on a lake, I use a 10lb DR ball and about 30 % more rope than the depth.
 In the river, I use a blade anchor and about 3x more rope than the depth.
Hope this helps ;0)

Bowline


12# pyramid most of the time, no chain, 1.5-3x depth depending on current and the length it takes to hold my position


14# pyramid when the current is really ripping on the american, 3-4x depth (hasn't happened recently tho   )