Vegetarian Newsletter
 Horticultural Sciences Department
A Vegetable Crops Extension Publication
  

Vegetarian 05-03
 March 2005

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Snack Food Association Potato Variety Trial, 2004

Cooperators:

Chad Hutchinson, Horticultural Sciences Department, University of Florida, Gainesville, FL.  Email: cmhutch@ufl.edu.
 Marion White, Mid-Florida REC, University of Florida/IFAS, 2725 Binion Road, Apopka, FL.  Telephone: 407-884-2034.

General Comments:

A goal of the Snack Food Association Trial is to identify a short-season processing potato variety with better production and quality characteristics than Atlantic, the current standard.  Chip quality was determined by personnel at Utz Quality Foods.

Planting Site:  University of Florida, PSREU Hastings Farm
 Planting Date/Harvest Date:  February 4, 2004; May 17, 2004
 Season Length:  103 days

Growing Conditions: Where conditions were less than ideal during the 2004 potato season.  February and March were wetter than normal in Northeast Florida.  The amount of rainfall early in the season qualified the research farm to apply 30 lb/Acre of supplemental nitrogen above the 200 lb nitrogen/Acre base rate (Best Management Practices).  Base and supplemental rates are both part of the BMP rate. May and June were hot.  Early season stress from heavy rain and no nitrogen (leaching) combined with the high temperatures late in the season impaired crop quality in the region.

Overall, weather conditions were poor, fertilization practices were good, irrigation practices were good and pest incidence was light.  Therefore, overall growing conditions for the trial were good.

Experimental Design:   Each variety/clone was planted in a single 250 ft row as dictated by the SFA protocol.  Four 20 ft sections of each row were harvested and graded.  This was not a replicated experiment.  Only means were calculated.

Row Spacing: 8 inches in-row, 40 inches between-row

Fertilizer: preplant, 100-43-86 lb/A; sidedress, 50-0-42 lb/A (2 appl.) and 30-0-25 lb/A

Pest Control:    Telone II, 6 gpa, pre-plant
                        Temik 15G, 20 lb/A, at planting
                        Sencor DF, 16 oz/A and Dual II Magnum, 1 pt/A, at hilling
                        Fungicides and Insecticides as needed, IPM program

Early Plant Size (Early Vigor): Not available
Highest Total Yield: ND5822C-7 (401 cwt/acre or 44.9 MT/ha)
 Highest Marketable Yield: W1773-7 (318 cwt/acre or 35.6 MT/ha)
 Best Overall Tuber Appearance: Snowden (6.7), ND5822C-7 (6.7), NY132 (6.7)
 

 

Table  1.  Snack Food Association Trial.  Total yield, marketable yield, percentage of yield by grade, size distribution, percent culls,  and specific gravity of chipping potato clones grown in Hastings, FL – 2004.
Clone

Total Yield
(cwt/A)

 

Marketable Yield 1
 (cwt/A)

  

Size
Distribution by Class (%)2

 

Size
Distribution (%)

   %
culls		 Specific
Gravity
 Percent of standard

C 

1

2

3

4

5

2 to 4

3 to 4

Season–103 days

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Atlantic

344

 

275

 

100

 

11

8

69

13

0

0

 

81

13

 

2

1.091

Snowden

396

 

306

 

111

 

11

11

74

4

0

0

 

78

4

 

0

1.086

A91790-13

314

 

250

 

91

 

10

7

59

23

0

0

 

83

24

 

3

1.083

AF2211-9

301

 

248

 

90

 

9

7

71

12

1

0

 

84

13

 

2

1.088

B1240-1

343

 

275

 

100

 

9

9

74

9

0

0

 

82

9

 

2

1.083

MSF099-3

248

 

154

 

56

 

18

18

61

3

0

0

 

64

3

 

2

1.086

MSJ461-1

299

 

155

 

56

 

29

17

51

2

0

0

 

54

2

 

2

1.077

ND2470-27

231

 

157

 

57

 

18

12

63

8

0

0

 

70

8

 

4

1.082

ND5822C-7

401

 

257

 

93

 

20

15

62

3

0

0

 

65

3

 

2

1.085

NY132

385

 

285

 

103

 

14

10

66

9

1

0

 

76

10

 

2

1.086

W1201

367

 

314

 

114

 

8

6

56

30

1

0

 

87

31

 

2

1.091

W1773-7

371

 

318

 

115

 

8

6

65

20

2

0

 

86

22

 

1

1.087

Average

333

 

247

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.085

Planted on February 4, 2004, fertilizer rate was 100-43-86/A plus 50-0-42/A (2 appl.) and 30-0-25/A side dressed, harvested on May 17, 2004.

1 - Marketable Yield:  size classes 2 to 4.
2 - Size classes: C = .5 to 1.5”, 1 = 1.5 to 1 7/8", 2 = 1 7/8 to 2.5", 3 = 2.5 to 3.25", 4 = 3.25 to 4", 5 = >4";   Size Distribution by Class was calculated with the following formula: Class (wt)/Total Yield (wt) – culls (wt)

 





 

Table  2.  Snack Food Association Trial.  Yield, vine maturity, tuber characteristics, and internal defects of chipping potato clones grown in Hastings, FL – 2004.

 Clone

Total Yield
(cwt/A)

 

 

 

Marketable Yield
(cwt/A)

 

 

 

Vine
Maturity1

 

 

 

Tuber Characteristics1

 

 

 

Internal Defects2

IFC

SC

 ST

 TS

 ED

APP

 HH

 BR

 CRS

 IHN

Season–103 days

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Atlantic

344

 

275

 

4.0

 

2.0

6.0

5.3

2.3

6.0

5.7

 

1

0

0

0

Snowden

396

 

306

 

3.0

 

2.0

6.0

5.3

2.0

5.7

6.7

 

0

0

0

0

A91790-13

314

 

250

 

3.0

 

1.5

6.7

6.3

2.7

6.3

5.3

 

0

0

0

0

AF2211-9

301

 

248

 

5.0

 

1.0

6.3

5.7

2.3

6.7

5.7

 

0

0

0

1

B1240-1

343

 

275

 

5.0

 

2.0

7.3

5.7

3.0

6.7

6.3

 

1

0

0

0

MSF099-3

248

 

154

 

1.0

 

2.0

6.3

5.3

3.7