C9 Flashcards
Is this the correct order for RICE POST HARVEST SYSTEM?
Harvesting—-> Threshing—-> Drying—-> Storage—-> Milling
Yes
.Is the process of cutting and gathering of the rice panicles from the mother plant
It includes cutting, drying, bundling, hauling field and
hay stacking of the paddy
Rice harvesting
Ideal moisture content when harvesting rice
21-25%
Using sickles for cutting
Manual Harvest
Windrowing or in-field drying
Manual Harvest
The field condition when using the reaper must be the same with the field condition
for manual harvesting
A. Reaped height: __ to __ cm
B. Stalk height:__ to __ cm
Ɵ. Prostrate angle: __°C
A. Reaped height: 10 to 30
cm
B. Stalk height: 50 to 100
cm
Ɵ. Prostrate angle: 60°C
Drain the field well about
__ days before harvest.
10 days
How many safety pins that are used in the reaper?
two (2) safety pins are used
• Foot treading
• Impact “hampasan”
Manual Threshing
Types of Mechanical Threshing
Hold On Types
Throw-inTypes
Pedal Threshers (or
motorized) 200 to
300 kgs/h
Hold On Types or Throw-inTypes?
Hold on types
• High capacity
• Clean grains
• Low labor requirement
• Suitable for fresh or wet
palay
Axial Flow Thresher
Ave. postharvest losses of axial flow thresher
2.18%
Laborers needed for axial flow thresher
4-6 labores
It’s design is Peg-tooth/concave grate
Axial Flow Thresher
Combines the operations of harvesting and threshing
RICE COMBINE
HARVESTERS
Mobile grain-harvesting machine for cutting, picking, stripping or picking up crop, threshing, separating, cleaning and conveying grain into a grain hopper and depositing harvest residue onto the ground.
RICE COMBINE
HARVESTERS
• Self propelled (Crawlers or
wheel drive)
• Cutting knives
• Threshing system
• Bulk or bagged discharge
Tye ff. Are types of ___
Combine harvesters
Based on a study of PHilMech and PhilRice (2010), a total of
____% Grain losses incurred during the postharvest
activities
16.47% grain losses
Both drying and Milling have the highest recorded
losses with __% and __% share respectively
36% and 34%
- When starting the
threshing clutch lever, do it
slowly and move the
acceleration lever to ___
position.
LOW POSITION
When the reaping part is
clogged, _____ the
reaping clutch immediately.
Disengage
Condition: When Some of the Grains Remain Un-threshed
Check: check the ___ of the
engine
Remedy: Move the accelerator lever to FULL position.
RPM
When Grain Selection
Performance is Poor, Change the grain sieve net from 19 mm to ___ mm.
17 mm
When the Amount of Scattered
Grains is Large, Adjust the opening of the______ adjustment to weaken the wind force.
winnower
Three major types of maintenance:
• Preventive Maintenance
• Corrective Maintenance
Innovative Maintenance
are maintenance activities done to keep the machines free from breakdowns for assured operation
Preventive Maintenance
maintenance activities done to repair an existing breakdown.
The objective is to keep the down time to the minimum. Hence, repairs must be done
promptly.
Corrective Maintenance
already involves some kind of innovation to
repair an existing breakdown. Machining of machine parts to make the machine run again
is a good example of _____ maintenance
Innovative Maintenance
Major causes of machine breakdowns are as follows:
• Insufficient or incorrect initial instruction and preventive maintenance – ___%
• Improper use – ___%
• Parts life – 9%
• Others – 14%
• Insufficient or incorrect initial instruction and preventive maintenance – 44%
• Improper use – 23%
CLEAN MACHINE EVERY __ HOURS
50 hrs
CLEAN DURING REAPING PROCESS AND AFTER HARVESTING IS COMPLETE
T or f
T
Replace New Coolant every ___
years
2 yrs
If Crops are not threshed completely, we should Raise the harvesting speed slightly
T or f
T
