You should have at least 12 inches of soil for root growth and plant stability. The rest of the height is simply for the gardener's convenience. In your box, that means around 1 cubic foot of soil. The rest is up to you. For instance, some gardeners use yard waste (leaves, pine straw) as filler; some use rocks. It depends on how sturdy the sides are.
garden tools
Depends on the density of the sand.
"How many yards of soil would you need to buy in order to fill up a garden whose measurements are 25 feet long by 18 feet wide by 8 inches high?"
108 cubic feet.
2.37 cubic yards.
10 ft x 12ft x 72 inches/12 inches/foot = 720 cu ft There is 105 pounds of gravel per cu ft, or 105* 720 = 75,600 pounds At 2000 pounds per ton, that is 75600/2000 = 37.8 tons
2.37 cubic yards of dirt is needed to fill an 8'X4' that is 24" deep garden box. If the box is filled 12 inches, the amount of soil needed is 1.19 cubic yards and that should be deep enough for most vegetables.
.21 yards of sand will fill an area 115 inches by 67 inches to a depth of 2.5 inches.
The total volume is 1568 cubic inches, so 1000 cubic inches of dirt will fill about 2/3 of the container
how many minutes are needed to fill a tank 166060.8 cubic inches
108inches= how many yards
volume = 23 x 34 x 1/12 = 65.17 cubic feet which is 65.17/27 = 2.41 yards or 6516 pounds at 100 pounds per cubic foot