Group Title: Citrus Station mimeo series - Florida Citrus Experiment Station ; 60-15
Title: Internal fruit quality factors of tangerine
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Full Citation
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Permanent Link: http://ufdc.ufl.edu/UF00072406/00001
 Material Information
Title: Internal fruit quality factors of tangerine in survey groves during 1953-1955
Series Title: Citrus Station mimeo series
Physical Description: 5 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 Experiment Station
Place of Publication: Lake Alfred FL
Publication Date: 1960
 Subjects
Subject: Tangerine -- 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 Experiment Station."
Funding: Citrus Station mimeo report ;
 Record Information
Bibliographic ID: UF00072406
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 75207879

Full Text











June, 1960


Citrus Station
Mimeo Series 60-15


INTERNAL FRUIT QUALITY FACTORS OF TANGERINE



In Survey Groves During 1953-1955



Eo 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.


,-I








INTERbAL fP.jIT Q4LITY W T '^RS OF TANGERINE


In S- ~i, Groves During 1953-1955


Eo J. Desayck and S. V. Ting


This report presents to the cooperating growers the internal fruit
quality results obtained in a survey of tangerine groves during the 1953-
1955 seasons. The inf,L.~k:: gives the grower an idea of the variation
in soluble solids, acidity, and ratio of soluble solids to acid in fruit
grown in individual groves, grouped according to rootstock, fruit size,
season and sampling period. The tangerine sampling was part of the state-
wide grapefruit survey conducted for four seasons under the direction of
Dr. L. G. MacDowell, the Florida Citrus Tei-.-i- 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.
During 1953 1954, 16 groves were .aah-. nine in Polk and three in
Orange and one each in He--i.:: Hig'ilindli.. Lake, and Pasco counties.
During 1?'4~-195? ., ,t;, groves were located in Orange with none in Hernando
and Pasco counties. Otherwise the number of groves was the same as during
the season earlier. i.2ly two=thirds of the :'ve. ranged from 11 to
25 years of age. The area covered by the groves amounted to approximately
200 acres, with most of the groves being a,. .-r: 20 acres. T,.elve groves
were on rough lemon rootstock but only four were on sour orange during
the first season and three during the last. There were two extremes in
the weather, since 1953-1954 was very wet and 1954-1955 was extremely dry.

In each grove the i:. -:i tagged six trees from which they collected
fruit Fsai3 -, biweekly from r..E .ei to MH.:h., A single fruit was picked
from each corner of a tree for a total of 24 fruit in a sample. During
the survey they collected approximately 500 amZrle:-. representing nearly
12,000 individual fruit.

The assembled results are tabulated according to season, sampling
periods, fruit size, rootstock and groves. Soluble solids or Brix and
acid are expressed as c ., t'gi.. in the juice. In Tables 1 and 2, each
value is the mean of all samples on a rootstock dfriin a sampling period,
while in Tables 3 and 4, each value is the mean.value of all sampling dates
for individual groves during a season.




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. E. Copeland, Director of the Citrus and Vegetable Inspection
Division for providing the services of four inspectors; and to Messrs. R. Co
Boney, G. G. Byrd, R R. RMays and 0. A. Wilkinson for collection of the fruit
samples.


250 6/17/60 EJD




Table 1. Seasonal changes in Brix, acid, and ratio of tangerine on two
rootstocks, for four sizes, during 1953-54.


Fruit Size
210 176 150 120
Sampling Period Brix Acid Ratio Brix Acid Ratio Brix Acid Ratio Brix Acid Ratio
% % % % % % % %


Rough Lemon*

Nov. 16-30 8.79 .86 10,5 8.77 .82 10.9 8.74 .77 11.4 8.83 .77 11.6
Dec. 1-15 9.11 .89 10.6 8.96 .81 11.3 8.80 .78 11.5 8.81 .73 12.3
Dec. 16-31 8.92 .76 11.8 9.08 .75 12.2 9,18 .70 13.3 9.17 .68 13.5
Jan. 1-15 8.90 .70 12.8 8.94 .67 13.3 8.99 .62 14.6 9.21 .60 15.4
Jan. 16-31 9.97 .64 15.6 9.69 .60 16.3 9.65 .59 16.4 10.01 .59 17.1
Feb. 1-15 10.95 .75 14.6 10.85 .68 16.0 10.95 .66 16.4 11.00 .63 17.6
Feb. 16-28 10.45 .63 16.8 10.47 .58 18.0 10.48 .59 17.7 10.45 .52 20.1

Sour Orange*

Nov. 16-30 10.15 1.29 7.9 10.77 1.18 9.2 10.58 1.13 9.4 10.45 1.06 10.0
Dec. 1-15 10.64 1,17 9.2 10.65 1.04 10.3 10.43 1.01 10.4 10.47 .94 11.2
Dec. 16-31 10.89 1.05 10.3 11.11 .90 12.6 10.86 .93 11.7 10.81 .89 12.2
Jan. 1-15 11.55 1.04 11.2 11.40 1.02 11.2 11.70 .96 12.2 11.00 .85 13.0
Jan. 16-31 13.85 1.04 13.4 13.50 .93 14.5 13.75 .97 14.2 13.60 .89 15.4
Feb. 1-15 13.70 1,00 13.8 13.60 .92 14.9 13.35 .91 14.8 12.75 .78 16.4


*Survey included 12 groves on rough lemon, and 4 on sour orange.







Table 2. Seasonal changes in Brix, acid, and ratio of tangerines on
two rootstocks, for four sizes during 1954-55.


Fruit Size
210 176 150 120
Sampling Period Brix Acid Ratio Brix Acid Ratio Brix Acid Ratio Brix Acid Ratio
% % % % % % % X


Rough Lemon*


Nov. 1-15
Nov. o41630
Dec. 1715
Dec. 16-31
Jan. 1-15
Jan. 16-31
Feb. 1-15
Feb. 16-28
March 1-15
March 16-31


9.83
9.91
10.07
10.77
11.24
11.57
12.22
12.26
12.38
12.80


1..42
1,20
1.08
1.05
.97
.91
.91
.87
.76
.73


7.0
8.4
9.5
10.4
11.7
12.8
13.6
14.2
16.3
17.5


9.83
9.93
10.03
10.55
10.97
11.27
11.95
12.52
12.00
12.50


1.29
1.16
1.06
.99
.88
.84
.84
.79
.68
.71


7.8
8.7
9.7
10.8
12.6
13.6
14.5
15.9
18.0
17.6


9.80
9.67
9.98
10.66
10.88
11.26
11.94
12.05
11.88
13.80


1.27
1.05
.96
.96
.87
,80
.81
.70
..67
.74


7.8
9.4
10.5
11.2
12.7
14.2
14.8
17.4
17.8
18.7


9.77
9.90
9.82
10.29
10.53
10.89
11.42
12.14
13.70
- C


1.24
1.00
.93
.88
.78
.71
.67
.65
.70


7.9
10.0
10.8
11.9
13.7
15.7
17.0
19.0
19.6


Sour Orange*


Nov. 1-15
Nov. 16-30
Dec. 1-15
Dec. 16-31
Jan. 1-15
Jan. 16-31
Feb. 1-15
Feb. 16-28
March 1-15
March 16-31


10.60
10.98
11.35
11.68
12.40
12.60
13.22
13.18
13.10
14.80


1.66
1.53
1.41
1.38
1.22
1.15
1.08
.99
.81
.90


6.4
7.3
8.1
8.5
10.1
11.3
12.2
13.4
16.2
16.5


10.60
10.88
11.08
11.67
12.33
12.56
13.52
13.28
13.80
13.75


1.65
1.41
1.34
1.24
1.11
1.03
1.06
.91
.71
.81


6.5
7.7
8.3
9.4
11.4
12.3
12.8
14.7
19.4
17.1


10.55
11.00
11.05
11.72
12.37
12.51
13.72
13.23
14.60
14.15


1.53
1.43
1.21
1.15
1.02
1.00
.98
.90
.77
.75


6.9
7.8
8.9
10.2
12.2
12.6
14.0
14.9
19.0
19.0


10.95
10.90

12.10
12.46
13.33
13.60
13.20
14.20


1.21
1.29

.94
.96
.90
.87
.62
.68


9.2
8.5

12.9
13.1
14.9
15.6
21.3
20.9


Survey included


12 groves on rough lemon, and 3 on sour orange.


------~-~









Table 3. Summary of fruit quality factors of tangerines grown on two
rootstocks, in four sizes in individual groves during 1953-1954.


Fruit Size
210 176 150 120
Grove No. Brix Acid Ratio Brix Acid Ratio Brix Acid Ratio Brix Acid Ratio
% % % % % 7% % %

Rough Lemon Rootstock

All 8.35 .83 10.1 8.28 .69 12.4 8.46 .71 12.0 8.85 .70 12.8
A12 9.22 .81 11.8 9.10 .74 12.6 9.26 .69 13.7 9.08 .64 14.5
A25 8.68 .79 11.5 8.72 .77 11.7 8.69 .69 13.0 8.67 .66 13.4
A26 9.42 .81 12.2 9.48 .74 13.5 9.68 .71 13.9 9.54 .69 14.4
A27 8.96 .77 11.8 9.09 .68 13.6 9.21 .69 13.8 9.38 .64 15.0
A28 9.61 .84 11.8 9.78 .80 12.5 9.61 .78 12.7 9.47 .72 13.5
A29 9.04 .77 12.2 9.01 .74 12.5 8.99 .71 13.0 9.28 .70 13.6
B10 8.97 .69 13.2 8.94 .68 13.6 8.66 .65 13.7 8.80 .64 14.2
B12 9.54 .69 14.0 9.41 .71 13.5 9.33 .64 14.6 9.39 .69 14.0
B18 8.80 .69 12.9 8.41 .66 12,8 8.58 .65 13.2 8.72 .58 15.1
C55 9.93 .89 11.6 9.99 .83 12.1 9.63 .75 13.2 9.95 .74 13.6
D6 9.59 1.04 9.3 9.34 .94 10.0 9.09 .85 10.8 9.14 .86 10.7

Sour Orange Rootstock

C46 11.92 1.13 10.8 11.80 1.01 12.1 11.82 1.00 11.9 11.66 .92 12.8
C47 11.05 1.16 9.6 10.95 1.06 10.4 10.59 1.02 10.4 10.10 .94 10.9
C62 9.63 1.00 9.6 10.28 .93 11.1 9.83 .89 11.1 10.18 .84 12.2
D9 9.35 1.36 7.0 10.59 1.18 9.1 10.54 1.15 9.2 10.79 1.11 9.8









Table 4. Summary of fruit quality factors of tangerines grown on two
rootstocks, in four sizes, in individual groves during 1954-1955.


Fruit Size
210 176 150 120
Grove No. Brix Acid Ratio Brix Acid Ratio Brix Acid Ratio Brix Acid Ratio
% 7. % % % % % %


Ronuh Lemon


10.36
11.38
10.95
11.55
11.21
11.24
11.16
10.13
11.80
9.93
11.90
11.00


1.02
1.18
1.04
1.16
.97
.98
.92
1.11
.87
.91
1.06
.78


10.4
9.9
10.9
10.3
11.9
11.7
12.3
9.1
13.7
11.0
12.1
14.4


10.30
11.24
10.93
11.59
11.23
11.26
10.79
9.77
11.38
9.83
11.69
10.73


.94
1.13
.99
1.12
.92
.91
.83
1.01
.79
.85
.99
.73


11.2
10.3
11.5
10.9
12.6
12.6
13.4
9.6
14.6
12.0
12.6
15.4


So~14 r Orany e


Rootstoek


10.16
11.16
11.09
11.35
11.00
10.93
10.54
9.47
11.33
9.84
11.95
10.85


.88
1.04
.95
1.00
.86
.83
.80
.91
.83
.81
.96
.71


11.8
11.2
12.0
11.9
13.4
13.5
13.5
10.4
13.8
12.4
13.3
15.9


9.91
10.93





9.58
11.02
9.62
11.58
10.37


.97
.98

=,=c



.91
.73
.68
.98
.70


10.4
11.8





10.7
15.3
14.5
12.8
15.4


11.95
12.75
12,05


1.34
1.21
1.21


9.3
11.2
10.6


12.01
12.41
12.17


1.23
1.13
1.12


10.1
12.0
11.4


12.02
12.79
12.19


1.18
1.05
1.05


10.7
13.0
12.3


11.75
12.51
12.95


1.02
.95
.94


11.8
14.3
13.9


All
A12
A25
A26
A27
A28
A29
B10
B12
B18
C55
C67


C46
C47
C62


--- ---- ------- -----------


Q^u-1- ,Q


---- -- --- ----------


Rootstock




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