Soil characteristics Climatic condition Rainfall Base period Type of crop Topography of agricultural land Method of ploughing Method of irrigation Water tax 3 Briefly explain about irrigation efficiencies? Water conveyance efficiency 2. Water application efficiency 3. Water use efficiency 4.
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Irrigation is defined as the science of artificial application of water to the land in accordance with the crop requirements. The area where irrigation is must for agriculture is called arid region. The area in which inferior crops can be grown without irrigation. The time period that elapses from the instant of its sowing to the instant of its harvesting is called crop period.
The time between the first watering of a crop at the time of its sowing to its last watering before harvesting is called the base period. The time interval between two such consecutive watering is called frequency irrigation. It is the relationship between the volume of water and the area of crops it matures is called duty of water. Each crop requires a certain amount of water after a certain fixed interval of time, through its period of growth is called delta of a crop.
The kharif crops are rice,bajra,jawar,maize,cotton,tobacco, groundnut,etc. Rabi crops are wheat,barley,gram,linseed,mustard,potatoes,etc 15 Define irrigation efficiency?
It is the efficiency of water output to the water input,and is usually expressed as percentage. Precipitation falling during the growing period of a crop that is available to meet the evapo-transpiration needs of the crop, is called effective rainfall. It is defined as the storage irrigation scheme,which utilizes the water stored on the upstream side of a smaller earth dam 11 define tank banks? The earthen bunds,spanning across the steams are called tank bunds or tank banks.
UNIT-3 1 What is meant by canal escape? State diff types of spillways. What are the various types of dams? The major part of the water is achieved by a raised crest or a small part is achieved by raising shutters then this barrier is known as weir. Spillway is a structure constructed at a dam site for disposing the surplus water from upstream to downstream. What are the modes of failure in gravity dams? Any hydraulic structure, which offers water to the offtaking canal, is called diversion headwork.
Types of aeration tanks. Unit - 4 A canal is an artificial channel, generally trapezoidal in shape constructed on the ground to carry water to the fields either from the river or from a tank or reservoir. What are the types of canals? Alluvial canal Non-Alluvial canal 3. What is alignment of canals? Watershed canal contour canal Side slope canal 4.
What is distribution system of canal irrigation? Main canal Branch canal Minor canal Major canal Water courses 5.
Define tank banks? The earthen bunds, spanning across the steams are called tank bunds or tank banks. What is called alluvial soil? The process of silt deposition may continue over long periods in the formation is called alluvial soil.
What is called Non-alluvial soil? Mountainous regions may go on disintegrating over a period of time, resulting formation of a rocky plain area called non-alluvial soil. What is called Watershed canal? The dividing ridge line between the catchment areas of two streams is called Watershed canal. List out the alignment of a fields canal?
They should be laid along field boundaries. They should be capable of supplying sufficient water to tail Separate field channels should be provided for high and low lands. Define cross drainage works? Define aqueduct and Write the different types of Aqueduct? Aqueduct is defined as the a drainage crossing in which the canal is carried over the drainage channel and the bottom at the canal trough or the covering over the drainage opening is above the high floods level in the drainage channel.
Define syphon aqueduct and the types of syphon aqueduct? Syphon Aqueduct: It is defined as a drainage crossing in which the canal is carried over the drainage channel preferably at right angle of the drainage discharge is carried under pressure through the structure. What do you meant by super passage? It is defined as a drainage crossing in which the drainage channel in a trough over the canal normally with full supply level at the canal below the bottom of the trough.
List out the collection at site data? Define canal regulators? Head regulators: The regulates or control the supplies to the off taking channel. They serve as a meter for measuring discharge entering into the off taking canal. Cross regulators: They effective regulation of the whole canal system can be done with the help of cross regulator. It helps in closing the supply to the discharge of the Parent channel. What are the remedial measures for losses?
What are the impact of water user association? What are the advantages of water user association? What is land management? The intensity of raising productivity per unit area per unit time needs to be increased which amounts to increasing croped area. What are the irrigation methods for cultivation? What are the uses of irrigation waters? What are the work of on farm development?
What is called optimum water depth? The quantity of water at which the yield is maximum, is called the optimum water depth. What is called optimum utilisation of irrigation? It generally means, getting maximum yield with any amount of water. Email This BlogThis! Where is the Menu? How to request Study Material?
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Irrigation is defined as the science of artificial application of water to the land in accordance with the crop requirements. The area where irrigation is must for agriculture is called arid region. The area in which inferior crops can be grown without irrigation. The time period that elapses from the instant of its sowing to the instant of.