Group Title: Lake Alfred AREC Research report
Title: Packinghouse newsletter
Full Citation
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 Material Information
Title: Packinghouse newsletter
Series Title: Lake Alfred AREC Research report
Alternate Title: Citrus packinghouse newsletters
Packing house newsletter
Physical Description: v. : ill. ; 28 cm.
Language: English
Creator: Citrus Experiment Station (Lake Alfred, Fla.)
Citrus Experiment Station (Lake Alfred, Fla.)
Agricultural Research and Education Center (Lake Alfred, Fla.)
Citrus Research and Education Center (Lake Alfred, Fla.)
Indian River Research Education Center
Publisher: Citrus Experiment Station
Place of Publication: Lake Alfred Fla
Lake Alfred Fla
Publication Date: October 1971
Copyright Date: 1965
Frequency: irregular
completely irregular
Subject: Citrus fruits -- Harvesting -- Periodicals -- Florida   ( lcsh )
Citrus fruits -- Packing -- Periodicals -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
periodical   ( marcgt )
Additional Physical Form: Also issued on the World Wide Web.
Dates or Sequential Designation: No.1 (Sept. 1, 1965)-
Issuing Body: Issued by the Citrus Experiment Station (no. 1-38); Lake Alfred (Fla.) Agricultural Research and Education Center (no. 39-136); Lake Alfred (Fla.) Citrus Research and Education Center (no. 137-189); and the Ft. Pierce (Fla.) Indian River Research and Education Center (no. 190- ).
General Note: Title from caption.
General Note: Latest issue consulted: No. 202 (Aug. 1, 2005)
 Record Information
Bibliographic ID: UF00095555
Volume ID: VID00029
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 02430250
lccn - 2006229390

Full Text
Newsletter No. 40

October 15, 1971
850-WFW-Lake Alfred, Florida


Editor: W. F. Wardowski
Harvesting and Handling Section
University of Florida
Agricultural Research and Education Center
P. O. Box 1088
Lake Alfred, Florida 33850





*Anyone wishing to receive this newsletter
may send a dozen stamped, preaddressed
envelopes to the above address.

Newsletter No. 40 AREC-LA-71-44
October 15, 1971
850-WFW-Lake Alfred, Florida 33850

Harvesting and Handling Section



"What's in a name?" said Will Shakespeare, "For a rose by any other name
would smell as sweet." Maybe this is true of roses, but the whole modern
science of semantics is devoted to the proposition that it is not true in human
relations. Semantically, "automation" is a bad word, but "mechanization" is a
good word. To the boss, "automation" means hope of a magic button that he will
push and then go fishing. In the citrus industry, he will never get it; but
meanwhile, its hoped-for prospect lures him into passing over needed, necessary,
minor advances. To the worker, "automation" means that somebody wants to abo-
lish his job and thus throw him out of work. He is naturally antagonistic and
wants no part of it. "Mechanization" is the use of machines to extend the
abilities of people. To the manager, it means a prospect of making his workers
more productive, hence, more valuable. To the worker, it means a better way to
do the job with the prospect of him being a machine operator rather than a
laborer. The simple word "mechanization" gives a basis for dignified discussion
and mutually advantageous planning for research worker, employer, and worker
alike. Despite this, "automation" jars the eye or ear in every technical
magazine, grower publication, or discussions such as those occurring in connec-
tion with our recent Packinghouse Day. Please let us mechanize together.

W. Grierson
Agricultural Research & Education Center
Lake Alfred


Many packinghouses experience overheating problems with the degreening rooms
early in the degreening season. This often occurs when no heat is required to
attain the recommended 850F temperature. Although this problem has always
existed to some degree, it has become more common as more emphasis has been
placed on better insulated degreening room construction. Some other factors
contributing to this problem are (1) heat added through steam input necessary
for keeping the humidity up, (2) exposed and uninsulated hot piping within the
room, (3) high outside ambient temperatures, and (4) fruit temperatures above
850F initially.

A water-spray humidification system can help to reduce this overheating
problem. The heat added by steam humidification is eliminated. Also, for each
pound of water vaporized at 850F, 1045 Btu's of heat from the air is required
tending to lower the air temperature slightly.
These pneumatic atomizing spray nozzles are being used successfully as the
exclusive means of humidity control for several refrigerated Florida citrus
storage rooms. This humidifying system has been installed on a trial basis in
the Agricultural Research & Education Center, Lake Alfred, degreening rooms.


1. Line voltage cooling thermostat mercury switch or snap
action type to minimize relay contact chatter and with
2 to 30F adjustable or fixed differential.

2. Single pole single throw (SPST) switch for manually
selecting the water humidification system if desired at
temperatures below 850F.

3. SPST relay (equivalent to Potter Brumfield KA5AG
120 VAC Coil, 10 amperes contacts) and octal socket.
N.C. (normally closed); N.O. (normally open)

*4. 120 VAC solenoid valve on steam humidifier line.

5. 120 VAC solenoid valve on air supply line.

6. 120 VAC solenoid valve on water supply line.

7. Pilot lamp indicator for water humidification system.


1. Line voltage thermostat single pole double throw
contacts with 2 to 30F fixed or adjustable differ-
ential--mercury switch or snap action type to
provide positive switching action.

2. Single pole double throw switch for manually
selecting the water humidification system if temperatures below 850F.

*3. On-off type humidistat control.

*4. 120 VAC solenoid valve on steam humidifier line.

5. 120 VAC solenoid valve on air supply line.

S6. 120 VAC solenoid valve'on water supply line.

7. Pilot lamp indicator for water humidification

*8. On-off type humidistat control.

*These pieces of equipment are generally already installed for degreening rooms with automatic steam humidification

Figure 1. Wiring diagrams for control to automatically switch from steam to water humidification, plus option
of manual override to use water if desired at temperatures below 850F.

Newsletter No. 40

This installation is designed to automatically switch the humidification from
steam to water at temperatures above 850F. Although no degreening has yet been
carried out in this room, this system keeps the empty room humidity at the
desired level. No water droplet fall-out can be detected. The necessary controls
for automatically switching from steam to water are shown in Figure 1.
Both water and compressed air must be provided for this system. Two possi-
bilities are available when installing this humidification system. Both air
and water may be supplied under pressure or only air pressure can be supplied
with water being supplied by suction from a reservoir. The double pressure
system is recommended as opposed to the reservoir system, since the open reser-
voir is more likely to result in nozzle stoppages from mineral deposits and algae
Based on limited experience, three atomizing nozzles per 1000 field boxes of
fruit appears to be adequate. Spraying System's Company spray nozzle No. 26-B,
or equivalent, should be used. Both air and water supply lines should be equipped
with strainer, pressure regulator, and 120 VAC solenoid valve. Piping from
strainers forward to the nozzle should be copper tubing.
Addresses for Pneumatic Atomizing Nozzle sources will be supplied upon
request. Manufacturers, distributors, and dealers are urged to contact us to
make a more complete list.

Douglas L. Deason
Agricultural Researcn & Education Center
Lake Alfred


Roy Knowles, Harvesting Manager, Golden Gem Growers, told what a packinghouse
looks like to harvesting crews in his presentation, "Harvesting Labor and Realism"
at Packinghouse Day last month. That description is repeated for those who have
requested it:

"To them, a packinghouse is a fickle monster who demands their services in frantic
spurts--and doesn't give a hoot between spurts.

It's a monster who wants a lot of fruit before its ripe and
WHEN it gets ripe--it turns its head and won't eat--UNLESS its--
Xmas or raining!

When fruit is large--it wants little ones and when fruit is
little--it wants big ones.

When fruit is all gone--its gets REALLY hungry and demands to

When all systems are GO--it gobbles up what we bring him--
churns it around in his stomach--and with an angry--expensive
snort--eliminates about half of it."


October 15, 1971

Newsletter No. 40


Available from Harvesting & Handling Section, Agricultural Research and Education
Center, P. O. Box 1088, Lake Alfred, Florida 33850.

"Program and Abstracts for Tenth Annual Packinghouse Day", Mimeo Report AREC-LA
71-32. September 8, 1971.

"Program and Abstracts for Twenty-Second Annual Citrus Processors Meeting",
Mimeo Report AREC-LA 71-40. October 7, 1971.

"Hormonal regulation of citrus fruit and leaf abscission", by M. A. Ismail.
1970. Proc. Fla. State Hort. Soc. 83:256-259.

"The effects of post-bloom chemical sprays on grapefruit", by B. S. Buslig,
R. D. Carter, G. E. Good, and J. A. Attaway. 1970. Proc. Fla. State Hort. Soc.


October 15, 1971

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