The cultivable part extends along the river line for a distance of about 10 m.
At the time of the French occupation of Egypt in 1798, it was found that the cultivable soil covered 4,429,400 acres, but the quantity actually under cultivation did not exceed 3,520,000 acres, or six-elevenths of the entire surface.
Throughout Egypt the cultivable soil does not present any very great difference, being always the deposit of the river; it contains, however, more sand near the river than at a distance from it.
Land which is neither cultivable nor under forest (marsh land or, in the northern mountainous districts, land above the upper limit of the forests) amounts to 61% in the far north and 36% in the Smaland highlands, but only to 15% in the central plains and in Skane.
From the region of the steppes the Aryans must have penetrated into the cultivable land of Eastern Iran: thence one part spread over the district of the Indus, then on again to the Ganges; another moved westward to Zagros and the borders of the Semitic world.