Group Title: Citrus Station mimeo series - Florida Citrus Commission ; 60-16.
Title: Internal fruit quality factors of navel orange
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Full Citation
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Permanent Link: http://ufdc.ufl.edu/UF00072405/00001
 Material Information
Title: Internal fruit quality factors of navel orange in survey groves during 1954-1957
Series Title: Citrus Station mimeo series
Physical Description: 2 leaves : ; 28 cm.
Language: English
Creator: Deszyck, E. J
Ting, S. V., 1918-
Citrus Experiment Station (Lake Alfred, Fla.)
Florida Citrus Commission
Florida -- Citrus and Vegetable Inspection Division
Publisher: Florida Citrus Commission
Place of Publication: Lake Alfred FL
Publication Date: 1960
 Subjects
Subject: Oranges -- Varieties -- Florida   ( lcsh )
Oranges -- Quality -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
 Notes
Statement of Responsibility: E.J. Deszyck and S.V. Ting.
General Note: Cover title.
General Note: "June, 1960."
General Note: "Cooperative research of the Florida Citrus Commission, the Citrus and Vegetable Inspection Division of the Florida Department of Agriculture, and the Florida Citrus Commission."
Funding: Citrus Station mimeo report ;
 Record Information
Bibliographic ID: UF00072405
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 75207092

Full Text








(* -*)


June, 1960


Citrus Station
Mimeo Series 60-16


INTERNAL FRUIT QUALITY FACTORS OF NAVEL ORANGE



In Survey Groves During 1954-1957



E. J. Deszyck and S. V. Ting


Cooperative research of the Florida Citrus Commission, the Citrus and
Vegetable Inspection Division of the Florida Department of Agriculture,
and the Florida Citrus Experiment Station.








INTERNAL FRUIT QUALITY FACTORS OF NAVEL ORANGE


In Survey Groves During 1954-1957


Eo Jo Dessyck and So V. Ting


This report presents to the cooperating growers the internal fruit
quality results obtained in a survey of Navel orange groves. The infor-
mation gives the grower a picture of the variations in soluble solids,
acidity, ratio of soluble solids to acid and juice content in individual
groves, grouped according to fruit size, rootstock, and seasons. Also,
the material. serves as a reference for the fresh fruit industry and the
researcher interested in quality of Navel oranges.

This survey was conducted during the 1954-1957 seasons under the
direction of Dr. L. G. MacDowell, Florida Citrus Commission, in cooperation
with the Citrus Experiment Station and the Citrus and Vegetable Inspection
Division of the Florida Department of Agriculture.

Some of the conditions pertaining to the groves in this survey are
briefly presented. All groves were selected on a voluntary basis. Most
of the groves were located in central Florida with only three groves located
on the East Coast. During 1956-1957, 30 groves were included, but fewer
groves were available during the earlier seasons. The total area of the
groves covered approximately 400 acres. Two out of every three groves was
on sour orange rootstock and covered ten acres or less The age of about
one-third of the groves ranged from five to ten years. Most common tree
setting was 25 ft. x 25 ft. Fertilizer was applied in the spring and fall
in more than half the groves; in one-third of the groves it was applied at
two pounds each of nitrogen and potash to every tree during any season.
During the survey period, 1954-1957, the weather was extremely dry.

In each grove, the inspectors tagged six trees from which theycc611eeted
fruit samples biweekly from September to March of each season. During the
survey they collected nearly 2000 samples representing more than 20,000
individual fruit.

The assembled results are tabulated according to season, size, rootstock
and grove number. Each result represents the average for the season con-
sisting in most cases of 12 to 13 samples of 12 fruit each. Acidity and
soluble solids or Brix are expressed as percentages in the juice, and juice
content is expressed as milliliters in 12 fruit.


Acknowledgments

The authors express their sincere appreciation to the many production
managers and independent growers for their generous cooperation in supplying
groves and records which made this study possible. They also thank Miss Mary
Dobbings, Florida Citrus Commission, for assisting in the tabulation of the
data; to Mr. G. Eo Copeland, Director of the Citrus and Vegetable Inspection
Division for providing the services of four inspectors; and to Messrs. Ro C.
Boney, G. G. Byrd, R. R. Mays and 0. A. Wilkinson for collection of the fruit
samples.


250 6/17/60 EJD










Relationship between degree of gelation in commercial frozen
orange concentrates after storage for 24 hr. at 800F. and
change in relative serum viscosity after rapid method


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GEL NUMBER 24 HR. AT 800F.

Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida. 997 9/21/60 KCL


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