Irrigation Agronomy Test 2 — Agri Master Mind

Crop with highest percent irrigated area is
  • Sugarcane
  • Rice
  • Wheat 
  • Mustard
Negative pressure in root is associated with 
  • Negative Transpiration
  • Passive Uptake
  • Active Uptake
  • None
The water held in soil with energy status > -0.1 bar is
  • Gravitational Water
  • Capillary Water
  • Hygroscopic Water
  • Available Water
Irrigation should be applied at 
  • 5% DASM
  • 15% DASM
  • 50% DASM
  • 25% DASM
Effective rainfall for semi-arid and arid area is considered to be
  • <50%
  • 50%
  • 70%
  • 100%
The easiness with which porous medium transmits fluid is called as
  • Infiltration
  • Percolation
  • Seepage
  • Permeability
Moisture sensitive period for tobacco is
  • Seedlings stage
  • Tillering stage
  • 50% Flowering
  • Entire crop period
Sprinkler system of irrigation is installed for 
  • Sandy Soils 
  • Saving crop against frost damage
  • Undulated topography
  • All of the above
In general, the bulk density of soil 
  • Decrease with profile depth
  • Remains constant
  • Increases with profile depth
  • Either increase or decrease
In absolute sence which country range first in total water footprints...
  • USA
  • India
  • China
  • Japan
Calculate Water Distribution Efficiency, if the depths of irrigation water are 1,2.5,3 and 0.5 
  • 50
  • 60
  • 70
  • 40
If two or more crops are to be grown together, the design depth should be of the crops 
  • Average  depths of roots 
  • Root depth of crop having shallow roots 
  • Root depth of crop having deep roots
  • Cannot be measured
Which type of evapotranspiration depend on climatic factors only..???
  • PET
  • Actual Evapotranspiration
  • Reference Evapotranspiration
  • Crop Evapotranspiration
The relationship between ET and Crop Yield in legumes is .....
  • Linear
  • Quadratic
  • Asymptotic
  • Curvilinear
Which of the following source of irrigation is maximum used in India?
  • Tube well
  • Open well
  • Canal 
  • Tank
If RSC value is ____, then it can be safely used for irrigation
  • <1.25 meq/L
  • 1.25 -2.50 meq/L
  • >2.5 meq/L
  • None of the above
If irrigation has to be applied at IW/CPE ratio of 0.5 and value of CPE is 6 cm, calculate depth of irrigation water to be applied
  • 3 cm
  • 12cm 
  • 4.5cm 
  • 6cm
If boron concentration in  irrigation water is 5-10 ppm is called as
  • Normal Water
  • Low boron water
  • Boron Water
  • High boron Water
The B.D. of a soil with P.D. 2.65 g/cc and pore space 40% would be 
  • 1.29 g/cc
  • 1.45g/cc
  • 1.59g/cc
  • 1.72g/cc
The grain yield of maize 5000kg/ha and ET was 40 cm. Calculate water use efficiency of maize
  • 10.5
  • 15
  • 12.5
  • 18.5
The unit of Water use efficiency is
  •  Q/ha mm
  •  kg/ha cm
  • Kg/ha mm
  • kg/ha m
The sorption and desorption curves depict the phenomenon 
  • Available Water
  • Crop coefficient
  • Hysteresis
  • Ratio of E.T:PET
Under moisture stress, the amino acid accumulated in the plants is 
  • Cysteine
  • Proline
  • Lysine
  • Tryptophane
Which of the following devices is used for water budgeting?
  • Tensiometer
  • Lysimeter
  • Hygrometer
  • Infiltrometer
The free energy of water in unsaturated soil is  
  • Zero 
  •  less than zero
  • one
  • More than one
Bio- drainage refers to 
  • Drainage by fast growing trees 
  • Drainage by microbes 
  • Drainage by pumps
  • None of the above
When FYM is added to the soil its
  • Bulk density will decrease
  • Bulk density will increase
  • Bulk density will not change
  • Porosity will decreas
Water application efficiency is defined as the ratio between
  • Quantity of water delivered to the farm and total quantity delivered at the reservoir
  • Quantity of water delivered to the farm and total quantity delivered at the field
  • Quantity of water stored in the root zone and water delivered to the farm
  • Average numerical deviations in depth of water stored from average depth stored during irrigation
Most common method of irrigation worldwide is
  • Drip irrigation
  • Sprinkler irrigation
  • Surface flooding irrigation
  • Sub surface irrigation
A canal irrigate 25,000 ha area with a discharge of 5 cumec. Calculate duty of water of canal.
  • 2000
  • 3000
  • 4000
  • 5000
The consumptive use of water for a crop. 
  • is measured as the volume of water per unit area
  • Is measured as the depth of irrigation water
  • May be supplied partly by rainfall and partly by irrigation
  • All are correct
The depth of water that a drainage system removes from its entire drainage area in 24 hrs is..
  • Leaching coefficient
  • Irrigation coefficient
  • Drainage coefficient
  • Drainage constant
The field capacity of a soil is 25%, its permanent wilting point is 15% and specific dry unity weight is 1.5. If the depth of root zone of a crop, is 80 cm, the storage capacity of the soil, is
  • 8 cm
  • 12 cm
  • 10 cm
  • 15 cm
If water table is comparatively high, the irrigation canal becomes useless, due to
  • Large amount of seepage
  • Water logging of the cultivated areas
  • Uncertain water demand
  • All of the above 
Soil with shallow depth and low organic matter content needs
  • Frequent irrigations
  • Heavy irrigations
  • Deficit irrigations
  • Differed irrigations
Which among the following is a controlled flooding?
  •  Furrow flooding
  •  Boarder flooding 
  •  Basin flooding  
  • All of the above
The unit of duty is
  • Cumec/ha m2 
  • ha/cumec 
  • Cumec/ha
  • Cumec/ha m3
Intermittent on and off system is followed in __________irrigation system
  • Check flooding
  • Flat bed irrigation 
  • Surge irrigation
  •  level border
Pick up the incorrect statement from the following. Culturable commanded area is the gross area of an irrigation canal system less
  • Population area
  • Alkaline area
  • Forest area
  • Fallow land
Flooding method of irrigation is suitable for
  • Groundnut
  • Rice
  • Maize
  • Sunflower
Irrigation canals are generally aligned along
  • Ridge line
  • Contour line
  • Valley line
  • Straight line
Which of the following is correct?
  •  WR = CU= ET
  •  WR= IR+ ER+ Soil profile moisture 
  • IR = WR – ER – Soil profile moisture
  • All of the above
Irrigation pottential given by
  • Brigg and shantz
  • Larsen
  • Buckinghum
  • Michel L
Irrigation scheduling is the process of determining
  •   The correct frequency and duration of watering
  • Irrigation efficiency 
  •  Irrigation frequency
  • When to irrigate and how much water to apply
Most critical stage of wheat for moisture stress is
  •  Seedling 
  • Crown-root initiation 
  •  Jointing
  • Flowering 
Which of following crops relative more tolerant to salinity?
  • Rice
  • Barley
  • Green gram
  • Coriander
 The unit of cumulative infiltration is 
  • Cm2/day 
  • Cm2
  • Cm/day
  • Cm
One ha-cm water is equal to  
  • 1000 litre
  • 10000 litre
  • 100000 litre
  • 1000000 litre
General depth of irrigation in India
  • 0.8 cm
  • 8 m
  • 1 cm
  • 100 cm
Once cumec of water is pumped into a farm distribution system. 0.8 cumec is delivered to a turnout, 0.9 kilometres from the well. Compute the conveyance efficiency.
  • 80 %
  • 70 %
  • 90%
  • 60%
10 cumecs of water is delivered to a 32-hectare field, for 4 hours. Soil probing after the indicated that 0.3 metres of water has been stored in the root zone. Compute the water application efficiency.
  • 57%
  • 87%
  • 77%
  • 67%
The process of distribution of irrigation water
  • Rostering
  • Irrigation manipulation 
  • Irrigation period
  • Irrigation intensity 
Range of High SAR
  • 10 - 18
  • 18 -26
  • > 26
  • None
A land is known as waterlogged
  • When the permanent wilting point is reached
  • When gravity drainage has ceased
  • Capillary fringe reaches the root zone of plants
  • None of the above
Micro leaching process occured in which irrigation method
  • Sprinkler 
  • Drip
  • Flooding 
  • Furrow
Sprinkler method of irrigation is not suitable for
  • Wheat 
  • Cotton 
  • Jute
  • None
A hyetograph is a graphical representation of
  • Rainfall intensity and time
  • Rainfall depth and time
  • Rainfall duration and time
  • Cumulative rainfall and time
Water from precipitation that is stored in the root zone of the soil and evaporated, transpired or incorporated by plants is referred as 
  • Blue water footprints
  • Grey water footprints
  • Rainbow water footprints
  • Green water footprints
In surface irrigation, which phase is sensitive to runoff loss? 
  • Ponding phase
  • Depletion phase
  • Advance phase
  • Runoff phase
The earthen embankments constructed parallel to the river banks at some suitable distance for flood control, are known as
  • Floods walls
  • Dikes
  • Levees
  • Both (b) and (c)
The maximum permissible slope per cent for furrow irrigation (short, near horizontal furrows) is
  • 0.1%
  • 0.5%
  • 1%
  • 5%
Water day celeberated at 
  • 22 march 
  • 23 march
  • 22 September 
  • 1 May
Device used for measuring water flow in pipes
  • Venturi meter
  • Weir
  • Parshall flume
  • Cutthroat flume
 Longest river of western Asia called  Euphrates originated from
  • Turkey
  • Egypt
  • Iraq 
  • Jordan
Which one of the following states has the largest area under canal irrigation?
  • Andhara Pradesh
  • UP
  • Maharastra
  • MP
Which of the following statements are correct? (a) Low head bubbler irrigation is a modified method of sprinkler irrigation. (b) Micro spray irrigation is a modified method of sprinkler irrigation. (c) Water application efficiency is usually higher in clayey soils than sandy soils. (d) In sprinkler irrigation system water is applied at lower rates than soils in filterability to prevent ponding and surface run off.
  • Only A
  • Only B
  • A and B
  • C and D
In India, approximately how much nation’s total electricity consumption goes toward pumping groundwater for irrigation
  • 1/5 
  • 1/4
  • 1/6
  • 1/8
Which of the following crops has high Transpiration ratio ?? 
  • Cotton 
  • Potato
  • Millets
  • Sorghum
Upper limit of available Water in soil is 
  • 0 bar 
  • -1/3 bar 
  • -15 bar 
  • -31 bar
Author of " Irrigation: Theory and practice
  • S.R. Reddy
  • A. M. Michael
  • Rajendra Singh
  • Majumdar
IWMI located  at 
  • Srilanka
  • Germany
  • Qutar
  • Canada
Negative pressure pottential of soil water is caused due to 
  • Weight of water column resting below the water table
  • Capillarity forces
  • Adsorptive forces
  • Both  B and C
Expression of soil water pottential in terms of energy per unit weight is
  • Dynes/cm2
  • Bar
  • Jule/kg
  • Cm
PF 4 is equivalent to
  • 10 cm of water column height
  • 10000 cm 
  • 1000 cm
  • 100000 cm
Assertion (A): Irrigation period should not exceed irrigation interval Reason (R): If irrigation period exceeds irrigation interval then there will be a problem in providing irrigation in command area.
  • Both A and R are true and R is the correct explanation of A
  • Both A and R are true and R is not the correct explanation of A
  • A is true but R is false
  • A is false but R is true
  • Both A and R are false
Assertion (A): Soil water moves from higher potential to lower potential Reason (R): Soil water moves from higher tension to lower tension
  • Both A and R are true and R is the correct explanation of A
  • Both A and R are true and R is not the correct explanation of A
  • A is true but R is false
  • A is false but R is true
  • Both A and R are false
Assertion (A): Potential of soil water at saturation is -0.1 bar Reason (R): Value of pF at field capacity is 2.54.
  • Both A and R are true and R is the correct explanation of A
  • Both A and R are true and R is not the correct explanation of A 
  • A is true but R is false
  • A is false but R is true
  • Both A and R are false
Assertion (A): Electrical resistance block is based on principle of dielectric constant of water varied by soil moisture Reason (R): Time domain reflectometry is based on principle of Wheat-Stone bridge.
  • Both A and R are true and R is the correct explanation of A
  • Both A and R are true and R is not the correct explanation of A
  • A is true but R is false
  • A is false but R is true
  • Both A and R are false
Assertion (A): The dissimilarity of SMCC curve prepared through sorption and desorption is called as hysteresis Reason (R): Geometric non-uniformity of individual pores, se=welling and shrinkage, entrapped air and contact angle cause hysteresis.
  • Both A and R are true and R is the correct explanation of A
  • Both A and R are true and R is not the correct explanation of A
  • A is true but R is false
  • A is false but R is true
  • Both A and R are false
IW/CPE ratio is given by
  • Ramdas
  • Parihar et. al
  • Dastane
  • None of the above
The Concept of Effective rainfall is given by
  • Parihar
  • Dastane 
  • Ramdas
  • None of the above
The term hysteresis is given by 
  • Hendrickson
  • Heins
  • Briggs
  • K. Tan
If cell A has the values of OP= 35 atm and TP = 22 atm and Cell B has values of OP= 40 atm and TP= 22 atm, water movement will be from
  • Cell A to Cell B
  • Cell B to Cell A
  • No movement
  • None of these
Darcy's law fails when the Reynolds number for the flow exceeds
  • 2300
  • 2000
  • 1
  • 4000
Soybean is
  • Deep rooted
  • Shallow rooted
  • Shallow rooted
  • Moderately rooted