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Diploma in Agricultural Engineering: Tractor and Power Unit Notes

Institution: College

Course: Diploma in Agricultural Engineering

Content Category: Class Notes

Posted By: 35824167

Document Type: PDF

Number of Pages: 27

Price: KES 120
 
    

Views: 3614     Downloads: 26

Summary

Download comprehensive high quality class notes for Tractor and Power Unit, This notes is prepared for students doing Diploma in agricultural engineering course.The notes are well detailed with clear diagram illustrations of various work in the course.it is in pdf format and you can edit it where you want.
Brief overview
LESSON 1 FARM POWER
Farm Power is an essential input in agriculture for timely field operations for increasing production and productivity of land. Farm power is used for operating different types of machinery like tillage, planting, plant protection, harvesting and threshing machinery and other stationary jobs like operating irrigation equipment, threshers/ shellers / cleaners/ graders, etc.

SOURCES OF FARM POWER
There are different sources of farm power available in which are classified as
1. Human power
2. Animal power
3. Mechanical power (Tractors + Power tillers + Oil engines)
4. Electrical power
5. Renewable energy (Biogas + Solar energy + Wind energy)

HUMAN POWER
Human power is the main source for operating small implements and tools at the farm. Stationary work like chaff cutting, lifting, water, threshing, winnowing etc are also done by manual labour. An average man can develop maximum power of about 0.1 hp for doing farm work

ANIMAL POWER
Power developed by an average pair of bullocks about 1 hp for usual farm work. Bullocks are employed for all types farm work in all seasons. Besides bullocks, other animals like camels, buffaloes, horses, donkeys, mules and elephants are also used at some places. The average force a draft animal can exert is nearly one-tenth of its body weight.

MECHANICAL POWER
Broadly speaking, mechanical power includes stationary oil engines, tractors, power tillers and self-propelled combines. Internal combustion engine is a good device for converting liquid fuel into useful work (mechanical work). These engines are two types 1. Spark ignition engines (Petrol or Kerosene engine)
2. Compression ignition engines (Diesel engines)
The thermal efficiency of diesel engine varies from 32 to 38 per cent whereas that of petrol engine varies from 25 to 32 per cent. In modern days, almost all the tractors and power tillers are operated by diesel engines. Diesel engines are used for operating irrigation pumps, flour mills, oil ghanis, cotton gins, chaff cutter, sugarcane crusher, threshers, winnowers etc.



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