I have been to funerals where the mourners shovel a little soil in, and the hired helped finish up, and I have been to funerals where the mourners did most of the work. I prefer the latter - it makes the situation more meaningful in my opinion.<quoted text>
And, vaults that are not waterproof in order to not impede decomposition.
What you have is about a gallon of Israeli soil next to the grave. The Rabbi takes a garden trowel and adds a scoop. Those who assist in the burial have a choice of a shovel of local soil or a scoop of Israeli soil. The cemetary crew then fills the remainder of the grave with local soil.
Some burial societies actually put the Israeli soil in the coffin.
I have also been to funerals where the mourners were prevented from filling in the grave by cemetary management because this is a UNION job (as well as prevented us from escorting the coffin into the grave as per custom). That pissed us of, but what you gonna do? The workers looked like people you dont want to be messing with..