Or more below the surface one wind-mill often supplies sufficient water to irrigate ten acres.
The central agricultural provinces are traversed by several important rivers, all of them rising on the western slopes of the snow-clad Andes and breaking through the lower coast range to the Pacific after being extensively used to irrigate the great central valley of Chile.
The fifth project, the Bowman, was to irrigate 10,000 acres in North Dakota and the northwestern part of South Dakota by storing the waters of the North Fork of Grand river.
It was designed to command an area of about 22 million acres, and to irrigate annually rather less than half that area.
Some farmers on tile uplands between the valleys in western Nebraska irrigate by means of wind-mills, and although the underground water is 175 ft.
Ajmere is almost totally devoid of rivers, the Banas being the only stream which can be dignified with that name, and it only touches the south-eastern boundary of the district so as to irrigate the pargana of Samur.
The Periyar irrigation project conducts water through the ghats in a tunnel to irrigate the Madras district of Madura, for which compensation of Rs.
Among them are: the Huntley project in Yellowstone county, begun in 1904 and practically completed in 1908, covering land formerly in the Crow Indian reservation, the irrigable area being 28,921 acres; the Lower Milk river project (and the subsidiary St Mary project), in Chouteau, Valley and Teton counties, by which the water of St Mary river 1 is stored and diverted to the headquarters of the Milk river to irrigate an area of 300,000 acres; the Sun river project (Teton, Lewis and Clark, Chouteau and Cascade counties), by which, as the ordinary flow of that river is already utilized for irrigation, the flood waters are stored and carried to the higher bench lands of the district; in Montana (Dawson county) and North Dakota (McKenzie county), the Lower Yellowstone project; and the Blackfeet project, to irrigate the Blackfeet reservation in Teton county.
A much greater scheme than any of the above is that of the Sind Sagar canal, projected from the left bank of the Indus opposite Kalabagh, to irrigate 1,750,000 acres at a cost of Bx.6,000,000.
Another great canal scheme for the Punjab proposed to take off from the right bank of the Sutlej, and to irrigate about 600,000 acres in the Montgomery and Multan districts, at a cost of Rx.
Two of these projects had been begun by 1909: the Umatilla project in Umatilla county, to irrigate 20,440 acres with water diverted from the Umatilla river by a dam (98 ft.
The total length of the main canal is 213 m., navigable throughout, and designed to irrigate 1,500,000 acres.
Above Echo, with a reservoir of 1500 acres, was authorized in 1905 and was 851% finished in 1909; the Klamath project, to irrigate 181,000 acres in Klamath county, Oregon (about 145,000 acres) and Siskiyou and Modoc counties, California, by two canals from Upper Klamath Lake and by a storage dam (33 ft.
Up to 1906 dependence was mainly upon the streams, which it is estimated might furnish 3 or 4 million acre-feet - enough to irrigate between 10 and 15% of the arid section - were all the water available, and the land I Data of the State Bureau of Labor and Industrial Statistics, which are lower than those of the state Board of Agriculture, and (in census years) the Federal Census.
Whatever may be the command of water, it is unwise to attempt to irrigate too large a surface at once.
We irrigate chiefly in the colder and wetter half of the year, and we " saturate " with water the soil in which are growing such plants as are perfectly content with earth not containing more than one-fifth of its weight of moisture.
In Upper Burma three productive irrigation works were planned at the opening of the century - the Mandalay, the Shwebo, and the Mon canals, of which the first was estimated to cost -Rx.323,280, and to irrigate 72,000 acres.
The Washburn project was to irrigate 5000 acres in McLean county with water pumped from the Missouri river.
Thus, water, moisture, weep, tears, inundate, irrigate," &c. The word a can also mean " shining, glistening," an idea evidently developed from the shining rippling of water.
With a shaduf it is only possible to keep about 4 acres watered, so that a great number of hands are required to irrigate a large surface.
It reclaims 360 acres, and was estimated to irrigate 4320.
The rivers of the province of Coquimbo - the Elqui or Coquimbo, Limari and Choapa - exist under less arid conditions, and like those of the province of Aconcagua - the Ligua and Aconcagua - are used to irrigate a much larger area of cultivated territory.