Usually I burned dvd -r with

# wodim -dev='/dev/scd0' -tao iso_image.iso

I discovered dvd +r now, is there difference with 'wodim'
command line arguments ? Do they need to be fixated after
every partial burn or I have to fixate it just at the last
burning session ( when I fullfilled the dvd ) ?
Do you know what is the fixating command argument ?