Er. Uttam Raj Timilsina(MSc.Engineering,IIT Roorkee)
Professor of Agricultural Engineering,Agriculture and Forestry University (AFU), Rampur, Chitwan, Nepal
uttamrajtimilsina@gmail.com
*All Right Reserved**
Uploaded and Shared by AgriYouthNepal
This is the powerpoint presentation related in the course of Farm Power and Machinery on B.Sc. Agriculture. It helps all to know easily about harvesting and threshing equipments related under that course. It also helps for the students of Agricultural Enginnering.
Er. Uttam Raj Timilsina(MSc.Engineering,IIT Roorkee)
Professor of Agricultural Engineering,Agriculture and Forestry University (AFU), Rampur, Chitwan, Nepal
uttamrajtimilsina@gmail.com
*All Right Reserved**
Uploaded and Shared by AgriYouthNepal
Threshing—It is the process of detaching the kernels from the ears/pods/ or panicles by a combination of impact and rubbing action.
It is accomplished either by treading the harvested crop under the feet of man or hooves of animals, and/or beating the harvested crop with stick or striking the harvested crop on hard and rough surface or using mechanical thresher.
This is the powerpoint presentation related in the course of Farm Power and Machinery on B.Sc. Agriculture. It helps all to know easily about harvesting and threshing equipments related under that course. It also helps for the students of Agricultural Enginnering.
Er. Uttam Raj Timilsina(MSc.Engineering,IIT Roorkee)
Professor of Agricultural Engineering,Agriculture and Forestry University (AFU), Rampur, Chitwan, Nepal
uttamrajtimilsina@gmail.com
*All Right Reserved**
Uploaded and Shared by AgriYouthNepal
Threshing—It is the process of detaching the kernels from the ears/pods/ or panicles by a combination of impact and rubbing action.
It is accomplished either by treading the harvested crop under the feet of man or hooves of animals, and/or beating the harvested crop with stick or striking the harvested crop on hard and rough surface or using mechanical thresher.
Er. Uttam Raj Timilsina(MSc.Engineering,IIT Roorkee)
Professor of Agricultural Engineering,Agriculture and Forestry University (AFU), Rampur, Chitwan, Nepal
uttamrajtimilsina@gmail.com
*All Right Reserved**
Uploaded and Shared by AgriYouthNepal
Er. Uttam Raj Timilsina(MSc.Engineering,IIT Roorkee)
Professor of Agricultural Engineering,Agriculture and Forestry University (AFU), Rampur, Chitwan, Nepal
uttamrajtimilsina@gmail.com
*All Right Reserved**
Uploaded and Shared by AgriYouthNepal
Primary & Secondary tillage Implements and their usesSazib akan
Tillage is the manipulation of the soil into a desired condition by mechanical means; tools are employed to achieve some desired effect (such as pulverization, cutting, or movement). cultivator. agricultural technology: Fallow system and tillage techniques. cereal farming: Seedbed preparation.
The main purpose of this presentation is give knowledge and mechanism and also parts of combine harvester. When we are Agricultural engineers and then combine harvester is very important for us.
Introduction
Crop planting operation is the art of placing seed in the soil to obtain good germination and crop stands.
A perfect sowing gives
Correct amount of seed per unit area.
Correct depth of sowing
Correct spacing between row-to-row and plant to plant.
Correct seed rate
INTRODUCTION
Tillage may be defined as the mechanical manipulation of soil for nurturing crops.
The objectives of soil tillage are:
To develop a desirable soil structure for a seedbed
To control weeds or remove unwanted crop plants.
To manage plant residues.
To minimize soil erosion by following such practices as contour tillage
To establish specific surface configurations for planting, irrigating, drainage, or harvesting operations.
To incorporate and mix fertilizers, manure, pesticides
Harvesting operations are one of the farm field operation in which seeds are separated from the stalk on which they grow. This is done when crops are ripened and reached maturity.
In order to achieve increased yield, the crops that are cultivated should be harvested at appropriate harvest time and moisture content. Both delayed and early harvesting results in decreased yield.
Definition
The operation of cutting, picking, digging or any combination of these for removing the whole crop or edible part of the crop from either under the ground or above the ground is called harvesting.
Lawn Mower Machine
For cutting a grass surface to the perfect height, a lawn mower machine uses several blades. The grass height can be adjusted by the operator according to their requirements.
Power Weeder Machine
Power Weeder are used to remove weeds, stir and pulverise the soil, and loosen it after the crop has started to grow. These machines are commonly used to weed orchards, sugarcane fields, cotton fields, tomato fields, rose nurseries, tobacco, soya, tropiyoka, floriculture, coconut and cashew plantations, and so on.
Er. Uttam Raj Timilsina(MSc.Engineering,IIT Roorkee)
Professor of Agricultural Engineering,Agriculture and Forestry University (AFU), Rampur, Chitwan, Nepal
uttamrajtimilsina@gmail.com
*All Right Reserved**
Uploaded and Shared by AgriYouthNepal
Er. Uttam Raj Timilsina(MSc.Engineering,IIT Roorkee)
Professor of Agricultural Engineering,Agriculture and Forestry University (AFU), Rampur, Chitwan, Nepal
uttamrajtimilsina@gmail.com
*All Right Reserved**
Uploaded and Shared by AgriYouthNepal
Primary & Secondary tillage Implements and their usesSazib akan
Tillage is the manipulation of the soil into a desired condition by mechanical means; tools are employed to achieve some desired effect (such as pulverization, cutting, or movement). cultivator. agricultural technology: Fallow system and tillage techniques. cereal farming: Seedbed preparation.
The main purpose of this presentation is give knowledge and mechanism and also parts of combine harvester. When we are Agricultural engineers and then combine harvester is very important for us.
Introduction
Crop planting operation is the art of placing seed in the soil to obtain good germination and crop stands.
A perfect sowing gives
Correct amount of seed per unit area.
Correct depth of sowing
Correct spacing between row-to-row and plant to plant.
Correct seed rate
INTRODUCTION
Tillage may be defined as the mechanical manipulation of soil for nurturing crops.
The objectives of soil tillage are:
To develop a desirable soil structure for a seedbed
To control weeds or remove unwanted crop plants.
To manage plant residues.
To minimize soil erosion by following such practices as contour tillage
To establish specific surface configurations for planting, irrigating, drainage, or harvesting operations.
To incorporate and mix fertilizers, manure, pesticides
Harvesting operations are one of the farm field operation in which seeds are separated from the stalk on which they grow. This is done when crops are ripened and reached maturity.
In order to achieve increased yield, the crops that are cultivated should be harvested at appropriate harvest time and moisture content. Both delayed and early harvesting results in decreased yield.
Definition
The operation of cutting, picking, digging or any combination of these for removing the whole crop or edible part of the crop from either under the ground or above the ground is called harvesting.
Lawn Mower Machine
For cutting a grass surface to the perfect height, a lawn mower machine uses several blades. The grass height can be adjusted by the operator according to their requirements.
Power Weeder Machine
Power Weeder are used to remove weeds, stir and pulverise the soil, and loosen it after the crop has started to grow. These machines are commonly used to weed orchards, sugarcane fields, cotton fields, tomato fields, rose nurseries, tobacco, soya, tropiyoka, floriculture, coconut and cashew plantations, and so on.
The process involved in sugarcane harvesting is base cutting of sugarcane, detopping, detrashing, bundle making and transporting the harvested cane to sugar mills.
Manual sugarcane harvesting is a very labor-intensive and laborious activity.
About 850-1000 man working hours per hectare is required for harvesting of sugarcane manually. Detopping and detrashing of crop itself takes about two-third of manpower required for harvesting. Delayed harvesting affects the quality of sugarcane, yield, juice quality and sugar recovery.
Mechanical harvesting also makes green cane harvesting possible, which reduces Green House Gas emissions. Sugarcane harvester should be capable to perform the following sequence of functions:
1- Gather and feed the cane toward the functional mechanisms
2- Cut the base of cane stalk.
3- Cut the green top of the cane stalk.
4- Feed cane stalks inside the machine.
5- Chop cane stalks into billets.
6- Blow out green tops and dry leaves.
7- Elevate chopped cane up to be loaded on a vehicle.
Threshing – traditional methods mechanical
threshers – types-principles and operation-moisture content –measurement –direct and indirect
methods – moisture meters – equilibrium moisture content.
Harvesting
For paddy, harvesting refers to the cutting and gathering of panicles attached to the stalks.
Harvesting at the right time and in the right way maximizes grain yield and minimizes grain losses and quality deterioration.
Once the plants have reached full growth (approximately three months after planting) and the grains begin to ripen-the tops begin to droop and the stem yellows-the water is drained from the fields.
As the fields dry, the grains ripen further and harvesting is commenced.
Stage of harvest :
Many factors must be considered to obtain optimum rice harvest.
The grain must be mature, high in quality and have proper moisture content.
Field should be sufficiently dry to support harvesting and transport.
Timely harvesting ensures good grain quality, high market value and improved consumer acceptance.
The right stage for harvesting is when about 80% panicles have 80 % ripened spike lets and their upper portion is straw colored. The grain contains about 20% of moisture.
Rice should be harvested when the grains on lower part of the panicle are in hard dough stage.
Maturity may be hastened by 3-4 days by spraying 20 % NaCl a week before harvest to escape monsoon rains
Harvesting methods :
Depending on the size of the operation and the amount of mechanization, rice is either harvested by hand or machine. The different harvesting systems are as follows:
Manual harvesting
Manual harvesting makes use of traditional threshing tools such as threshing racks, simple treadle threshers and animals for trampling or by hand using sharp knives or sickles. Gives 55-60 % grain recovery.
Manual harvesting and machine threshing
Rice is manually threshed, then cleaned with a machine thresher.
Machine reaping and machine threshing
A reaper cuts and lays the crop in a line. Threshing and cleaning can then be performed manually or by machine.
Combine harvesting
The combine harvester combines all operations from paddy harvesting to rice extraction - cutting, handling, threshing and cleaning. Gives 50 % recovery.
Average yield :
A well-managed crop of mid-late duration varieties yield about 60-70 quintals/ ha.
Short duration varieties yield about 45-55 quintals.
About 40-60 quintals/ ha of fodder also becomes available per season.
Top
Post Harvest Technologies
Threshing
Threshing is the process of beating paddy plants in order to separate the seeds or grains from the straw.
To maintain the high quality of the harvested grains, it should be threshed immediately after harvesting.
Avoid field drying and stacking for several days as it affects grain quality due to over drying. Stacked grains of high moisture content results in discoloration or yellowing.
Threshing can be done manually or mechanically
Manual threshing
The manual methods of thr
We've compiled a list of modern farm tools and their agricultural applications. Give yourself some time to learn about agricultural equipment that will make your life much easier and save you a lot of time on the farm. Farm Equipment and Their Uses can also be found here.
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Harvesting machines
1. Harvesting Machines
Prepared by
Er.Uttam Raj Timilsina(MSc.Engineering,IIT Roorkee)
Professor of Agricultural Engineering,AFU
uttamrajtimilsina@gmail.com, 9841684994
For
Batch 2069/2070,BSc.Ag,4th semester(071/7/16-071/10/15)
Course Code:AEN-301,Farm Power and achinery(1+1
2. Indigenous harvesting tool used in Nepal
Harvesting equipments for different crops
Mowers-Types ,working principle and
constructional details
Reapers and reapers binders-Types,working
principles and constructional details
Potato digger-working principles and
constructional details
3. Indigenous harvesting tools used in Nepal:-
Harvesting of field crops is one of the most abour
consuming operarion of farming in Nepal.Harvesting of
almost all cereals crops,potato,sugarcane and other crops
in Nepal is being done manually by using most popular
hand tools like CommonSickles Serrated Sickles and
Spades.By experiences as well as field research, It is
realized that harvesting manually by using sickles it takes
about 170-200 man hours to harvest 1 ha of paddy crop.
Due to high labor demand at the time of harvesting, the
entire harvesting operation continues for weeks
together,resulting grain losses to the extent of 5-15 % due
to over drying of crop in the field .
4. Harvesting Machines
Use of mchanical devices or machines like
reapers,mowers potato diggers combine
harvester are initiated to harvest cereals crops
like paddy and wheat being feasible in Terai areas
of Nepal but the application of such machines is
not being feasible in rest areas of hills and
mountains.Therefore harvesting of cereals
crops,potato,sugarcane by using hand tools like
sickles spades in hill and mountain is a
compulsion without other alternatives of
machine use.
20. Harvesting Equipment
• Crop harvesting equipment:-In developed countries farming
systems is fully or partially mechanized with the use of
seeding,planting , harvesting and threshing
macnineries/equipments.The use of such equipments is supported
by commercial farming principle ,economy and technologies in
developed countries like as the use of following harvesting
equipments
Cereal crops harvesters like Rice/Paddy Harvester ,Wheat,Barley
Harvester,Maize harvester as well as Combine Harvester
Sugarcane Harvester
Root crops harvester like Ground nut harvester,Potato Harvester
Cotton Harvester
Forage crops harvester
Fruit crops Harvester
40. Harvesting Machines(HM)
• Constraints of harvesting:- The overall
constraints of field crops harvesting in Nepal by
mechanical equipments are categories as:
Farmer Constraints:- Which are listed as
-Low income
-Low investing capicity,
-Reluctance to change traditional methods,
-Poor mechanical aptitude,and
-Desire to save straw for other use
41. HM
Farm Constraints:-Which are listed as:
-Small farm holdings
-Very small plots size with high bunds
- Poor water control or muddy field
-Inadequate ground support for harvesting
equipment
-Lack of access road to the field
42. Harvesting Machines(HM)
Crop Constraints:-Which are listed as :
-Excessive moisture content at harvesting time
-Uneven ripening
-Severe lodging and high shattering tendency
of local and tall varities
-Low grain/panicle-straw ratio
-
43. HM
Equipments constraints:- which are listed as:
-Lack of functionality of machines regarding
operation and maintenance skills
-Difficult to change the operational practices of
farmers for operating indigenous tools
-High cost of imported equipments
44. HMT
• Harvesting tools and machineries:-
Manuals Tools
- Differents types of sickles like serrated sickles,plain
sickles
-different types of spades like hoe type spades,flat
type spade etc
Animal drawn machines-
-Mowers
-Diggers
46. • Mowers:- Mowers are designed to cut meadow grasses and fodder
crops/forage crops.Depending upon the source of power used
mowers are classifed as:-
Animal Drawn Mowers,Trailed type
Tractor drawn Mowers
-Trailed type with ground wheels
-Semi mounted type with ground wheels
-Tractor mounted type:-Rear mounted mowers, front mounted
mowers,side mounted mowers,Central or mid mounted mowers
Depending upon the mode of construction as well as working
action these mowers are classified as:-
- Cutter bars type or finger bar type used for fodder or forage crop
harvesting
-Rotary blade type or rotary grass cutters used for lawn
maintaining ,lawn grass cutting
47. HM
• Main parts of cutter bar mowers:-
Cutter bars or finger bars unit:-It is the main part of
mower.The main function of this unit is to cut crops
and separate it from uncut portion.The knife moves
back and forth over the guard surface to cut plants in
both direction due to shearing action .It consists of
parts as knife of triangular section, inside shoe,out
side shoe,guards,ledger plate,wearing plate, knife
clips,and grass board.The knife is the most important
part of the cutter bar.The types of knife are smooth
cutting edge types,top serrated cutting edge
type,bottom serrated cutting edge type.
48. HM
Power transmitting unit:- The main function of this unit is
to receive and transmit motive force. It consists of main
axle,spur gears ,bevel gear,crank shaft, crank wheel and
pitman (connecting rod).The main axle receives power
from PTO shaft of tractor in case of tractor mounted type
and one of the transport wheel in case of trailed type.The
reciprocating(back and forth) motion is transmitted to the
pitman which in turns operates the knife on the cutter bar
by converting rotary motion to reciprocating motion by
means of dynamically balanced devices.The knife makes
about 1600 cutting stroke/minute.In order to engage or
dis-engage the driving unit a clutch is provided on the
counter shaft so that operator can operate it by foot from
the seat.
49. HM
Frame or body of the mower :-It support all moving parts
of the mower and provides penings for main
axle,countershaft,crankshaft as well as also provides space
for gears ,clutch and bearings.
Transport wheels-The transport wheel transmit power to
the cutter bar knife.It is so arranged that when the wheel
move forward the rachet and powl(gear box mechanism)
mechanism comes into play to drive the main axle.
Auxillary parts:-In tractor drawn mower hand liver is
provided to regulate,and adjust the cutter bar height as
well as stopping and starting of mower in action from
operator seat.Similarly in animal drawn mower foot lift is
provided so that the cutter bar can be raised when turning
at corners or to avoid obstructions.A hand liver is also
provided to adjust the height of cut.
50. HM
• Rotary Mower:-These are the mowers which have knives rotating
about a substantially vertical spindle.Rotary mowers mostly are
used in lawn or orchard to cut grass to maintain the lawn,orchard
and play ground.Rotary mowers are of two types:-
Drum type mowers:- These are driven from the top by a shaft and
gears or V-belts having numbers of rotary blades or knives moving
inside the drums.Drum mowers with 3-4 double edges blades or
knives carriers are of single drums or double or multi drums with
more coverage of grass cutting areas in a single operation.
Disc mowers:- Disc mowers are smaller in size than drum mowers.
Rotating discs with sharp serrated cutting edges are fitted with
vertical spindle.When disc rotate with high speed the cutting action
take place with serrated edge of the disc.
67. HM
• Reapers:-The working principle of reapers is same as like cutter
bar mowers.Reapers are used to harvest cereal crops like rice and
wheat.The size of machine varies from 1.8-2.1 meter depending
upon the size of a prime mowers.They are mostly power tiller
operated as well as tractor operated and self propelled reapers
powered by 6 hp diesel engine.The cutter bar receives power
from that engine for crop harvesting operation.Reaper consists of
a cutter bar,crop row divider called reel and conveyor belt,star
wheel etc. The reel direct the crop towards cutter bar where it is
cut.The star wheel lift the cut crops up and turn it at 90 degree.
69. Mostly the reaper are mounted on front, rear but side
as well as mid side of tractors or hand tractors. The
tractor front mounted machine s having cutter bar
length of 1.9-2.1 meter are operated at the forward
speed of about 3 km/hr.The cut crops are carried along
by belts to the entire width of machine before being
placed on the ground with reaper winder or without
winder.The reaper have the hydraulic lifting and
lowering mechanism of cutter bar as cutting height
adjustment of crops.Reaper is generally used to cut
plant leaving crop stubble to a height of about 8 cm on
ground.Reapers are available
70. HM
• Harvesting devices for root crops: The harvesting
devices or use of equipments for root crops like potato
diggers or potato harvester,groundnut diggers or
harvester is beneficially increasing trends.
Potato diggers:- It is realized that in some
circumstances the cost of harvesting of potato
manually is higher than the market price of potato in
terms of commercial potato farming.So it is need to
create a situation of profitable potato farming by the
use of potato farming equipments like potato
planter,potato diggers or potato harvester in case of
large scale potato farming.
71. HM
Types of potato diggers:-
-Animal drawn potato diggers-single row diggers
-Tractor drawn potato diggers-Double row or multi row diggers
Potato diggers consists of parts like digger blade,conveyor,shaker
belts ,elevators,graders and other associaries.The ridge bottom
and replaceable bar point share,shovel type share are in common
use in potato digger.The digger share uplift the whole mass of soil
containing potato tubes then passes this mass to conveyor and
shaker belts where seperation of potato tubes from soil takes place
by falling soil mass to ground and conveying the potato tubes
either to fall down to ground surface or to store in container by the
use of elevator.