Post-Harvest Handling and Transportation Methods that...

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Post-Harvest Handling and Transportation Methods that Allow Small-Scale Growers To Deliver Top-Quality Produce Jeff Kindhart, University of Illinois

Transcript of Post-Harvest Handling and Transportation Methods that...

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Post-Harvest Handling and Transportation Methods that Allow Small-Scale Growers To Deliver Top-Quality ProduceJeff Kindhart, University of Illinois

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Why are good post harvest practices important?

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High-quality, disease free produce

with a good shelf life is a result of

good production practices, proper

handling during harvest, and

appropriate post harvest handling

and storage. ---- ATTRA, Post

harvest handling of fruits and

vegetables

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Maintain Quality

Appearance

Texture

Flavor

Nutritive value

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Protect Food Safety

Maintain good sanitation

Avoid introduction of pathogens

Keep from spoilage

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Reduce Losses Between Harvest and Consumption

Improves efficiency

Improves profitability

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Process begins the moment produce is harvested

Avoid rough handling– Train workers – what and how

Use appropriate harvesting container

Try to avoid harvest in excessive heat

Keep product as cool as possible while awaiting transport to the packing shed – Shade

– Get to the shed

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Packing Methods

None ????

Field packing

Packing shed

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Field packing

Picking into final package

– Reduced handling and associated damage

– Reduces labor cost

– Strawberries and peaches

Self propelled field packing systems

– Peppers and snap beans

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Trip from field to packing shed

Slow down ---- smooth ride

Keep shaded if long trip or will sit out at shed before being packed

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Packing Shed

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Packing Shed

Roof with or without sides

Packing line

Cold storage area

Loading dock

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Packing line

Should be appropriate for size of your operation

Should be designed to work with commodity you grow

Vary widely by producer

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Components

Dump

Receiving line

Washer (waxer)

Inspection table

Sizer (label applicator)

Sorting tables

Boxing

Conveyors

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Cold Storage

Most important factor for maintaining quality

– Removes field heat

– Lowers respiration

– Reduces water loss

– Decreases sensitivity to ethylene

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Even after picking, strawberries remain alive and produce heat as a natural consequence of respiration. The amount of heat they produce depends on the storage temperature. At 32 F a ton of strawberries will produce approximately 3,300 Btu per day, whereas at 80 F, a ton will produce

41,800 Btu!

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Why cool?

Suppress enzymatic degradation and respiratory activity (softening)

Slow or inhibit water loss (wilting)

Slow or inhibit the growth of decay-producing microorganisms (molds and bacteria)

Reduce production of ethylene (a ripening agent) or minimize the product's reaction to ethylene.

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Lowest safe temperature

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Cold storage compatibility

Ethylene

– Producer

– Sensative

Similar temperature

Similar relative humidity

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Cold storage methods

Mechanical Refrigeration

Evaporative

Ice

Underground

High altitude

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Mechanical Refrigeration Cooling

Forced Air

Room Cooling

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Introduction to

Proper Postharvest Cooling and Handling Methods

Prepared by

M. D. Boyette, Extension Agricultural Engineering Specialist

L. G. Wilson, Extension Horticulture Specialist

E. A. Estes, Extension Marketing Specialist

Sponsored by the Energy Division, North Carolina Department of Commerce, with petroleum violation

escrow funds, in cooperation with the Agricultural Extension Service, North Carolina State University. Any

opinions, findings, conclusions, or recommendations expressed herein are those of the authors and do not

reflect the views of the Energy Division, North Carolina Department of Commerce.

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Room Cooling

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Forced Air Cooling

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COOL AND SHIP:

A LOW-COST, PORTABLE FORCED-AIR COOLING UNIT

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Transportation Methods

Open Vehicle

Refrigerated Vehicle

– Box Truck

– Tractor Trailer

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Resources

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Postharvest Cooling and Handling ofStrawberries

http://www.bae.ncsu.edu/programs/extension/publicat/postharv/ag-413-2/index.html