In scientific classification of biota, a subphylum is a taxonomic rank in zoological nomenclature. The taxonomic rank of 'subdivision' in fungi and plant taxonomy is equivalent to 'subphylum' in zoological taxonomy.
Another general rule is that your driveway should be around 10 to 12 feet wide, and a few feet wider at the curves. If you have space, itâs always a good idea to provide a larger area at the top for turning around or for additional parking when needed. A 12âx18â space or larger is ideal for this.
Gravel is a good choice for driveways. A gravel drive should have a first layer of baseball-sized stones at least 4 inches deep. According to Tim Carter of AskTheBuilder.com, each layer thereafter should be 4 inches thick and in gradually smaller stone. Compact each layer with a tamping machine, and cover with the final layer of crushed gravel for a depth of about 12 inches.