For measuring uniform flow of water, weirs used are

1 Answer

Answer :

Ans.Rectangular and Trapezoidal weir

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Description : The most common water flow measuring device which measures water flow in open conduit is

Last Answer : Ans.Parshall/Venturi flume

Description : Why does the v notch give more accurate flow measurement than any other weirs?

Last Answer : Need answer

Description : Which of the following crop geometry ensures uniform solar radiation availability to crop?

Last Answer : Ans.Square

Description : Which organ gets affected in Weirs disease? (1) Liver (2) Lung (3) Heart (4) Kidney

Last Answer : (4) Kidney Explanation: Weil's disease is a severe form of leptospirosis, a type of infection caused by Leptospira bacteria. The classic form of severe leptospirosis is known as Weil's disease, which is characterized by liver damage (causing jaundice), kidney failure, and bleeding.

Description : Sharp crested weirs are generally used (A) For large flows (B) For small flows (C) For streams carrying high sediment loads (D) For rivers carrying floating debris

Last Answer : Answer: Option A

Description : The flow of excess water from the field after saturation of soil.

Last Answer : Ans.Runoff

Description : Horizontal flow of water in irrigation channels or through canals is known as

Last Answer : Ans.Seepage

Description : Detachment and transportation of top soil particles by wind and or by water is known as.

Last Answer : Ans.Soil erosion

Description : What is the concentration of solution in ppm if 2 kg of 2,4-D is mixed with 1000 lit of water?

Last Answer : Ans.2000

Description : The chemicals used to check transpiration losses of water

Last Answer : Ans.Antitranspirents

Description : Which is accumulated in the leaves of water stressed plants

Last Answer : Ans.ABA

Description : The moisture deficit condition, results when the amount of water vapour available in the soil is not sufficient to meet the demand of potential evapo-transpiration

Last Answer : Ans.Drought

Description : Water harvesting in situ is known as

Last Answer : Ans.Runoff farming (VII) Dryland Agriculture

Description : Salt content in irrigation water evaluated as best quality

Last Answer : Ans.0.2 to 0.5 g/lt

Description : The ratio of the crop yield to the total amount of water used for irrigation is called, measured in kg/ha-cm is

Last Answer : Ans.Water use efficiency

Description : What will be CPE value when irrigation is scheduled at 0.8 IW/CPE with 6.0 cm depth of irrigation water?

Last Answer : Ans.7.5 cm or 75 mm

Description : The period when water requirement is maximum is called as

Last Answer : Ans.Critical stages of water requirement

Description : Water requirement of maize and groundnut are

Last Answer : Ans.50-80 cm

Description : Water requirement of cotton crop

Last Answer : Ans.70-130 cm

Description : Water requirement of sugarcane

Last Answer : Ans.150-250 cm

Description : Water requirement of wheat, sorghum, soybean and tobbaco are

Last Answer : Ans.45-65 cm

Description : Water requirement of rice is

Last Answer : Ans.90-250 cm

Description : The consumptive use of water is equal to

Last Answer : Ans.ET + Mw

Description : The quantity of water needed for normal crop growth and yield in a period of time to a place and may be supplied by precipitation or by irrigation or by both.

Last Answer : Ans.Water requirement of a crop

Description : The process in which soil water lost from leaves of plants in the form of vapour and enters the surrounding atmosphere.

Last Answer : Ans.Transpiration

Description : A diffusive process by which liquid water in the form of vapour is lost in the atmosphere

Last Answer : Ans.Evaporation

Description : Capillary movement of water is complemented by

Last Answer : Ans.Root extension

Description : When water is held tightly as thin film around soil particles by adsorption forces and flows at gravity of > -31 bar, is called

Last Answer : Ans.Hygroscopic water

Description : The water, retained by the soil in capillary pores (micropores), against gravity (-1/3 to - 31 bar) by the force of surface tension

Last Answer : Ans.Capillary water

Description : The water, that moves downward freely under the influence of gravity (< 1/3 bar) beyond the root zone

Last Answer : Ans.Gravitational water

Description : The amount of soil moisture or water content held in soil after excess water has drained away is called

Last Answer : Ans.Field capacity (FC)

Description : The water content between Field capacity (-1/3 bar) to PWP (-15 bar) is called

Last Answer : Ans.Available water

Description : The saving of water in sprinkler and drip irrigation methods as compared to surface irrigation methods

Last Answer : Ans.25-50%and 50-70%water, respectively.

Description : Discharge rate of water per dripper is

Last Answer : Ans.1-4 litre/hrs

Description : Micro irrigation method, in which water is applied as drop form through emitters

Last Answer : Ans.Drip method

Description : The rate of water delivery in sprinkler system is

Last Answer : Ans.>1000 litre/hrs.

Description : Micro irrigation method, in which water is applied as spray

Last Answer : Ans.Sprinkler method

Description : Venturi meter is used to measure water, if

Last Answer : Ans.Water flow from the pipe

Description : Volumetric method of water measurement are

Last Answer : Ans.Furrows, Sprinklers and Drippers

Description : The process of determining when to irrigate and how much water to apply is termed as

Last Answer : Ans.Irrigation scheduling

Description : The quantity of water (gm) necessary for a plant to produce 1 kg of dry matter is known as

Last Answer : Ans.Transpiration coefficient

Description : The percentage of applied irrigation water stored in the soil and made available for consumptive use by the crop

Last Answer : Ans.Irrigation Efficiency

Description : The total depth of water (cm) required y a crop during its duration in the field

Last Answer : Ans.Delta

Description : Volume or quantity of water required for irrigation to bring a crop to maturity

Last Answer : Ans.Duty of water

Description : Downward movement of nutrients and salts from the root zone with the water

Last Answer : Ans.Leaching

Description : Vertical movement of water or downward movement of water from different soil layer is called as

Last Answer : Ans.Percolation

Description : First entry of water from the upper layer of soil is known as

Last Answer : Ans.Infiltration

Description : The artificial application of water to supply moisture essential to plant growth is termed as

Last Answer : Ans.Irrigation

Description : The deep water rice are

Last Answer : Ans.Punkaj, Jagannath

Description : A branch of agricultural science which deals with principles and practices of soil, water and crop management.

Last Answer : Ans.Agronomy