Great day plowing 1940 9N

Hooked up the Dearborn two bottom plow to my tired 1940 9N and was surprised what a great job it did. Figured it would struggle seeing engine has not been apart for at least the 45 years my Dad has had it. Did put a crack in the plow share up toward the front. Was hitting a few old tree roots. Tractor muscled right through them. One gave quite a jolt so figured that might have been the one that cracked it. Any secret to welding this up?

Shares and mold boards are an interesting
type of steel.
Most steels made for high abrasion
resistance are fairly brittle.
Most steels with high strength won't have
the required abrasion resistance.
In moldboards, etc you have a combination of
both.
I guess if it were me, I would weld it for
strength - so it won't become brittle and
crack again. It won't take any special rod
to do it. Good old 7018 would be fine.
But I would vee it out so I had 100%
penetration. Then I would preheat it to
around 800 degrees.
I would probably weld it in place. Nice to
weld stuff like that from both sides but if
you remove it it will warp. Your root pass
is important - so do your best to dig that
rod in there but not blow through.
Grind out any imperfections before you make
another pass. Don't get it too hot either.
Let it cool for a few minutes between
passes.
Just let it air cool afterwards.
Welding will soften it so it will abrade
quicker. Bur as little as these old
implements get used anymore you probably
won't ever wear it out.
Usually I would do a little job like that
just for fun and maybe some pale ale. But my
torch and welder are in storage and I can't
for a while.