Post harvest engineering - introduction - objectives - post harvest losses of cereals, pulses and oilseeds - importance - optimum stage of harvest. Threshing - traditional methods mechanical threshers - types-principles and operation-moisture content - measurement - direct and indirect methods - moisture meters - equilibrium moisture content. Engineering properties of agricultural produce.

Principles, air screen cleaners: types, adjustments. Cylinder separator, spiral separator, magnetic separator, colour sorter, inclined belt separator, length separators, effectiveness of separation and performance index. Different types of graders for cereals, pulses and oil seed crops. Drying: principles and theory of drying, thin layer and deep bed drying, hot air drying, methods of producing hot air, types of grain dryers, selection, construction, operation and maintenance of dryers, design of dryers

Material handling: belt conveyor, screw conveyor, chain conveyor, bucket elevators, pneumatic conveying. Direct and indirect types of damages, sources of infestation, traditional and modern types of storage structures: vertical, horizontal and underground storages, storage structure Designs

Paddy processing: parboiling of paddy, methods, merits and demerits, dehusking of paddy: methods, merits and demerits; rice polishers: types, constructional details, polishing, layout of modern rice mill, performance evaluation of modern mills. Wheat milling, pulse milling methods. Oil seed processing, Sugarcane crushing, extraction recovery and processing of jaggery. Principles and operation: maize sheller, husker sheller for maize, groundnut decorticator, castor sheller.

Physical and thermal properties of fruits and vegetables, maturity indices for fruits, cleaning and grading of fruits and vegetables. Electronic colour sorting of fruits and vegetables. Unit operation of fruit processing :blanching of fruits and vegetables ,thermal processing of fruit pulps. Controlled and Modified atmospheric storage and shrink film storage of fruits and vegetables