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Indian Forest Services (Main)
Examination-2025 DJSM-U-AGRE
AGRICULTURAL ENGINEERING
PAPER—I
Time Allowed : Three Hours Maximum Marks : 200
QUESTION PAPER SPECIFIC INSTRUCTIONS
Please read each of the following instructions carefully before
attempting questions
There are EIGHT questions in all, out of which FIVE are to be attempted.
Question Nos. 1 and 5 are compulsory. Out of the remaining SIX questions, THREE are to be
attempted selecting at least ONE question from each of the two Sections A and B.
Attempts of questions’ shall be counted in sequential order. Unless struck off, attempt of
a question shall be counted even if attempted partly. Any page or portion of the page left blank
in the Question-cum-Answer Booklet must be clearly struck off.
All questions carry equal marks. The number of marks carried by ೩ question/part is indicated
against it.
Unless otherwise mentioned, symbols and notations have their usual standard meanings.
Assume suitable data, if necessary, and indicate the same clearly.
Neat sketches may be drawn, wherever required.
Answers must be written in ENGLISH only.
DJSM-U-AGRE/47 1 ৮০১০৭
(b)
(6)
(0)
(૭
(b)
(c)
(0
SECTION—A
Discuss the major types of precipitation storm.
Discuss the impacts of soil erosion on water quality.
Discuss the basic assumptions and steps involved in the development of unit
hydrograph.
Discuss the requirements and essential features of trickle spillway and flood
spillway in an earth dam.
Explain the application of GIS in the area of water resource development and
management.
Explain the functional relationship of length of slope and degree of slope in the ৷
process of soil loss by water erosion. Discuss the methods of estimation of
erosivity from rainfall data.
What are the factors that influence soil erodibility by wind? Discuss the
impacts of different types of water erosion.
(0 A watershed has an area of 1000 hectares and an average slope of 1-5%.
The average 30-year, 24-hour duration rainfall is 76:2 mm, while the
runoff volume calculated by the curve number technique is 31:4 mm. The
length to width ratio is 35:1. Determine time to peak and peak
discharge.
(ii) Determine the size of each side of a square box inlet for a drop spillway to
handle a peak flow of 3-2 cumecs over a fall of 1-5 m, if the energy head to
10
15
fall ratio is not to exceed 06 at any time. 10+5=15
What are the principles and objectives of watershed management? Discuss the
criteria used for prioritizing watersheds.
Discuss in brief about compartmental bunding, intra-plot water harvesting,
ridge furrow planting and field bunding methods used for in situ water
harvesting and moisture conservation. Enlist the ex situ methods of water
harvesting.
Write down the principles to be adopted while calculating the spacing of bunds
(contour and graded bunds). Also, calculate the height of the bunds, if the
distance between the bunds is expressed by L, vertical interval between the
bunds is expressed by V, width of water spread is expressed by W and land
slope is expressed by S percent. Assume the maximum rainfall amount which
has to stand behind the bund as 15 cm.
DJSM-U-AGRE/47 2
15
10
15
4. (a)
(৮)
(c)
धि
(0
(0)
(6)
(b)
Discuss the classification of remote sensing based on platform, energy source,
regions of electromagnetic spectrum and number of bands. 15
Discuss the importance and requirement of ground truthing in remote sensing.
Explain the various parameters of ground truthing used for remote sensing of
land cover types. 15
Write short notes on the following :
(9 Remote sensing data products
(1) Digital elevation models
(iii) Types of cameras for aerial photography
(iv) Forest cover mapping using remote sensing
(v) Application of remote sensing for crop water stress monitoring த்து
x5=
SECTION—B
Discuss the important factors affecting planning and design of minor irrigation
projects. 8
Discuss the subsurface vertical distribution of groundwater with an emphasis
on different types of subsurface water. 8
Discuss the critical differences between crop water requirement and irrigation
water requirement. 8
An agricultural area of 1 hectare needs to be drained of excess water. The soil
contains 47% pore space and the soil moisture content after gravitational
drainage is 39% (by volume). Find the void ratio, drainable porosity and
drainable water volume from the area. The effective root zone depth of the area
is 09 m. 8
With a neat drawing, explain the stanchion barn for housing of dairy animals.
Mention its specific advantages. 8
List the different methods of water flow measurement on an agricultural farm
for an underground/overground pipeline and for open channel network. Also,
briefly discuss their principles of measurement. 15
(૪ Discuss the different types of drip irrigation systems based on installation
method, emitter discharge rate and wetted soil surface area. 7
(1) A sprinkler irrigation system is to be installed in an area of 20 hectares.
The crop to be irrigated is wheat with gross application depth of 20 cm.
The irrigation interval is 10 days with 12 operating hours per day.
Determine the sprinkler irrigation system flow capacity in litres per
second. 8
DJSM-U-AGRE/47 3 [ P.T.O.
(c) Write short notes on the following :
(0 Warabandi system of water allocation
(ii) Conjunctive use of surface and groundwater
(iii) Soil moisture characteristic curve
(iv) Fertigation equipment
(v) Reference evapotranspiration
+ ৮ 7 2x5=10
7. (a) Discuss the advantages and limitations of surface drain and subsurface drain.
Explain and discuss the information required to design and for the installation
of subsurface drainage systems. 15
(b) Discuss the characteristics of saline, sodic and saline-sodic soils. Explain the
principles and approaches of saline soil management. 15
(© What are the requirements of good water supply distribution system for
farmstead? Briefly discuss about the different water distribution systems
commonly adopted in farmstead. 10
8. (a) Write short notes on the following :
(0 Electric farm fencing
(ii) PUSA storage bin
(iii) Advantages of greenhouse cultivation
(iv) Requirements of good storage structures
(v) Classification of lime used in farm housing
3x5=15
ہما (9 Write briefly about the various aspects of selection and design of
greenhouse. 10
(ii) Briefly describe the different types of silos which can be used to store
animal feed/forage. 5
(c) What are the advantages of deep litter poultry housing? Draw a neat sketch to
accommodate 1000 birds. Take floor area of 0-36 sq. m per bird. 10
kkk
DJSM-U-AGRE/47 4 26BS—246
