noun
definition
The act or process of irrigating, or the state of being irrigated; especially, the operation of causing water to flow over lands, for nourishing plants.
Examples of irrigation in a Sentence
Irrigation works have been carried out in various parts.
The method of this irrigation is peculiar.
Irrigation benefits a sandy soil, draining a marshy soil.
But where irrigation is employed the yield of crops is excellent.
The agriculture of the region bordering the Tigris and Euphrates, like that of Egypt, depended largely on irrigation, and traces of ancient canals are still to be seen in Babylonia.
The Nerbudda is nowhere utilized for irrigation, and navigation is confined to the lower section.
He couldn't develop new irrigation techniques, invent new machinery, or create new fertilizers.
Both draining and irrigation are noticed, though the latter but slightly.
The rainfall is uncertain and low, however, never exceeding 40 in., and on the supply of water by irrigation the future of the industry mainly depends.
In this region irrigation is widely used.
If you look back across the span of time, you see wood plows being used in 4000 BC, then irrigation five hundred years later.
Except on the scattered oases, where irrigation from springs and mountain streams has reclaimed small patches, the desert is barren and forbidding in the extreme.
Through this part of its course the current of the river, except where restricted by floating bridges - at Feluja, Mussaib, Hillah, Diwanieh and Samawa - does not normally exceed a mile an hour, and both on the main stream and on its canals the jerd or oxbucket takes the place of the naoura or water-wheel for purposes of irrigation.
There are several lakes of great depth and streams well fitted for the purposes of irrigation, of which full advantage is taken by the natives.
Because of this extreme aridity, agriculture in Nevada is dependent on irrigation.
Among a variety of premiums awarded by the state are those for the best cultivated estates and for irrigation works, and to the owners of the best stallions and brood-mares.
The problem for the agriculturist here is not irrigation, but drainage and keeping down spontaneous growths.
Irrigation is used to a large extent.
The steppes along the bottom of the principal valley are for the most part too dry to be cultivated without irrigation.
The benefits of canal irrigation were introduced in the 'seventies, and the revenue thus doubled.
The estimate premised a cost of £50,000, the irrigation of 42,000 acres, and the reclamation of io,000.
They had also much skill in the construction of works for the supply of drinking water on a large scale and for irrigation.
The Panlaung and Zawgyi rivers from the Shan States flow through the district and are utilized for the numerous irrigation canals.
Irrigation is rudimentary, for no system exists for raising the water of the innumerable canals on to the fields.
In 1905 the government started preliminary surveys for a system of irrigation.
Moreover, a college under the control of the Ministry of Lands and Agriculture, which was founded in 1909, provides locally courses of instruction in these subjects and also in irrigation engineering, sericulture and surveying.
Philo, De posteriori Caini, § 3, explains the name as meaning iroru ryos,"watering" or "irrigation," connecting it with the Hebrew root Sh Th Josephus, Ant.
On the lower courses of the Habra and the Sig, barrages have been built for irrigation purposes.
At Saint Martory it gives off the irrigation canal of that name.
Agriculture was formerly developed on the Tekez, as is testified by old irrigation canals.
The western portion of the state is a plain watered by the Zarafshan and by countless irrigation canals drawn from it.
A large part of the country is too arid for agriculture, and even with irrigation the water supply is sufficient for only a small part of the dry area.
Land suitable for cultivation is found only in oases, where it is watered by irrigation canals, but these oases are very fertile.
Irrigation, careful husbandry and railroad communications have much developed the resources of their country, in themselves excellent; and there are many manufacturing towns and industrial establishments.
Then, there are the mangrove-fringed coasts and the dripping wooded slopes where rare orchids thrive, and above these, on the inland side of the sierra, a treeless, sun-scorched table-land where only the cactus, yucca, and other coarse vegetation of the desert can thrive without irrigation.
The Mexicans understood digging channels for irrigation, especially for the cultivation of the cacahuatl, from which they taught the Europeans to prepare the beverage chocollatl; these native names passed into English as the words cacao, or coco and chocolate.
The remainder of the residency is well-watered and fertile, important irrigation works having been carried out.
The open valleys between the spaced ranges offer many tempting sites for settlement, but in the south irrigation is needed for cultivation.
The ranges of the Rocky Mountains in their turn receive some rainfall from the passing winds, but it is only after the westerlies are reinforced by a moist indraft from the Gulf of Mexico and the Atlanticthe result of summer or of cyclonic inflowthat rainfall increases to a sufficient measure on the lower lands to support agriculture without irrigation.
The wall is nearly encircled by a stream of water, artificially diverted from the small rivulets which flow through the precincts, furnishing the establishment with an abundant supply in every part, for the irrigation of the gardens and orchards, the sanitary requirements of the brotherhood and for the use of the offices and workshops.
Weirs are essential for raising the head of water for water-wheels at mills, and for diverting some of the flow of a river into irrigation canals; but they have received their greatest and most varied extension in the canalization of rivers for navigation.
There are three distinct classes of weirs, namely, solid weirs, draw-door weirs, including regulating sluices for irrigation, and movable weirs, which retain the water above them for navigation during the low stage of the river, and can be lowered or removed so as to leave the channel quite open in flood-time.
The barrage at the head of the Nile delta, and the regulating sluices across the Nile at Assiut and Esna in Upper Egypt below Assuan, are examples of draw-door weirs, with their numerous openings closed by sluice-gates sliding on free rollers, which control the discharge of water from the river for irrigation.
The precipitation in southern Saskatchewan and Alberta is much more variable than farther east and north, so that in some seasons crops have been a failure through drought, but large areas are now being brought under irrigation to avoid such losses.
The interior plateau may be described as arid, so that irrigation is required if crops are to be raised.
In some parts of the semiarid districts in the interior of the province irrigation is being successfully practised for the purpose of bringing land under profitable cultivation for fruit.
No special tillage is required, but weeding and irrigation are requisite.
In tropical countries drought is the commonest cause of a failure in the harvest, and where great droughts are not uncommon - as in parts of India and Australia - the hydraulic engineer comes to the rescue by devising systems of water-storage and irrigation.
Irrigation is better able to bring fertility to a naturally arid district than to avert the failure of crops in one which is naturally fertile.
The sum of 12 crores is regularly set aside for this purpose, and is devoted as a rule to the construction of protective irrigation works, and for investigating and preparing new projects falling under the head of protective works.