Title: Vegetarian
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Permanent Link: http://ufdc.ufl.edu/UF00087399/00539
 Material Information
Title: Vegetarian
Physical Description: Serial
Language: English
Creator: Horticultural Sciences Department, Institute of Food and Agricultural Sciences
Publisher: Horticultural Sciences Department
Place of Publication: Gainesville, Fla.
Publication Date: September 2009
 Record Information
Bibliographic ID: UF00087399
Volume ID: VID00539
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.

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Vegetarian Newsletter


A Horticultural Sciences Department Extension Publication on Vegetable Crops

Eat your Veggies!!!!!

Issue No. 549 September 2009



IS HYDROPONICS READY FOR SOLAR?


By: Richard Tyson, County Extension Director & Extension Agent IV
Orange County Extension Service



The environmental impact of producing food can be reduced by incorporating
green / clean technologies into production inputs. Powering equipment using solar
energy in Florida "The Sunshine State" has considerable potential. A prototype solar
powered hydroponic system developed for the statewide Small Farm Conference 2009
http://smallfarms.ifas.ufl.edu/floridasmallfarmsconference/index.htm (Fig. 1A) could be
expanded to a larger version and evaluated for use by small farmers, market gardeners, or
for home use by master gardeners.

The system consists of a bench bed (aluminum roof panel) nutrient flow technique
re-circulating tank culture hydroponic system with a continuous duty marine bilge pump
in the nutrient tank direct connected to a Kyocera 40 watt solar PV module (Fig. 1B)
www.realgoods.com. A ballast resistor is attached to the positive (red) wire to moderate
electron flow during peak sunlight hours. The system runs continuously when the sun
shines on the solar panel and shuts off during cloudy days or at night. A capillary mat
keeps the plant roots moist when the pump is off. The pump lifts the nutrient solution to
the high side of the bench bed where it gravity flows back to the tank.

Lettuce and herb transplants were placed through slits in a silver mulch cover and
their roots allowed to sit on the capillary mat with foliage above the plastic mulch cover.
The system is well adapted to small rooted, short season crops that thrive under high
moisture conditions. Lettuces, basil, mint, and stevia performed especially well.
























A
Figure 1. Prototype solar hydroponic system for lettuces and herbs.
[Photo credits Tyler Jones, UF/IFAS]









Vegetarian Newsletter


A Horticultural Sciences Department Extension Publication on Vegetable Crops

Eat your Veggies!!!!!

Issue No. 549 September 2009



Sweet Onion Variety Trial, North Florida Research and
Education Center, Quincy, Florida Spring 2009


By: Stephen Olson, Professor
North Florida Research and Education Center, Quincy, Florida




Now is the time to start thinking about planting sweet (short-day) onions. Sweet onions are a
relatively minor crop in Florida. Production exists as both dry bulbs (mature) and green tops
(immature). Limited production exists throughout the state. The biggest deterrent for increased
production is from competition from established markets in south Texas and middle Georgia
(Vidalia) areas. However, the potential exists for expanding production, especially in the areas of
local sales and direct marketing.

The objective of this trial was to evaluate the performance of sweet onion varieties under
northwest Florida conditions.

The transplants for this trial were produced from field beds at the North Florida Research and
Education Center, Quincy. Twenty one varieties were seeded on 6 Nov 2008. Two of the
varieties ('Red Rhone' and 'Red Flavor') were red onions. Seed were planted at rate of about 30
seed per ft into rows spaced 12 inches apart. Preplant fertilization of seedbeds was 30-40-40
lbs/A ofN-P20O-K20. Dacthal W 75 was applied over the top at 10 lb/A after seeding.
Seedbeds were top dressed once with 34 lbs N/A. Entries were transplanted into the production
field on 7 Jan 2009. Soil type was an Orangeburg loamy fine sand. Total fertilization was
160-80-140 lbs/A ofN-P2Os-K20. Production scheme was 3 rows spaced 15 inches apart under a
6 ft tractor and in-row spacing was 4 inches (65,340 plants/A). Goal 2XL at 2 pts/A was applied
on soil surface before transplanting. Registered pesticides were applied as needed to control
pests.









Entries were harvested as they matured, where maturity is defined as when about 50% or more of
the tops of an entry had fallen down naturally. Bulbs were lifted, allowed to dry for a few hours
and tops and roots removed. Bulbs were then placed in bushel baskets and dried for 72 hours at
100 F in large drying rooms. After drying time was complete, onions were removed, allowed to
cool down and graded. Grading consisted of discarding culls (small onions, splits, off color and
decayed) and sizing into medium (1.5-2 inches), large (2-3 inches) and jumbo (>3 inches)
categories. Bulbs were then weighed and counted.

Harvest occurred from the period of 28 April to 28 May. Total yields ranged from 989 50-lb
bags/A for 'WI-3115' to 201 50-lb bags/A for 'Red Rhone' (Table 1). Only 'WI-131' produced
total yield equal to 'WI-3115'. Yields were good to excellent in 2009 and growing conditions
were good. 'XON 403 Y' produced the largest bulb at 14.5 oz and 'Carmelo' produced the
smallest at 7.4 oz. Percent marketable bulbs ranged from a low of 36 % for 'Red Rhone' to a high
of 99 % for 'Honey Bee'. Days to harvest from transplanting ranged from 111 days for 'WI-301'
and 'Honeybee' to 141 days for 'Red Flavor', and 'Red Rhone'.










Table 1. Onion Variety Trial Spring 2009 North Florida Research and Education Center, Quincy.


Marketable Yield
Entry Sourcez (50 lb sacks/A) Marketable Bulb Wt. Da to Harvest
Entry Source Day to Harvest
(0/o) (oz)
Jumbo Total

WI-3115 Wannamaker 945aY 989 a 96.5 ab 13.8 ab 114
WI-131 Wannamaker 815 ab 871 ab 94.8 ab 12.1 a-f 114
Sweet Harvest Sakata 733 b-c 796 bc 94.0 a-c 11.4 a-f 118
XON 403Y Sakata 768 a-c 784 b-d 74.8 ef 14.5 a 133
Sweet Deal Shamrock 706 b-d 761 b-e 96.8 ab 10.7 b-g 117
Sugar Belle Shamrock 723 b-d 761 b-e 80.3 c-f 12.3 a-d 121
Sweet Vidalia Nunhems 696 b-d 747 b-f 92.8 a-c 10.9 b-g 128
WI-301 Wannamaker 666 b-e 746 b-f 92.3 ab 10.4 b-g 111
Sweet Caroline Nunhems 692 b-d 742 b-f 91.5 a-d 10.8 b-g 128
SSC 1535 Shamrock 683 b-d 731 b-f 92.3 ab 10.4 b-g 114
Honeycomb Shamrock 619 c-f 681 c-g 78.8 d-f 10.3 b-g 118
Sweet Jasper Sakata 627 b-e 650 c-h 78.5 d-f 11.6 a-f 133
Honey Bee Shamrock 548 d-g 643 c-h 99 a 9.1 c-f 111
Ponderosa Sakata 579 c-f 600 d-i 66.8 f 12.2 a-e 134
Gobi Nunhems 456 e-h 596 e-i 96.8 ab 8.8 d-g 128
Don Victor Nunhems 428 f-h 568 f-i 91.5 a-d 9.2 c-g 128
Caramelo Nunhems 383 gh 509 g-j 96.8 ab 7.4 g 118
Kalahari Nunhems 374 gh 472 h-j 72.8 ef 9.4 c-g 135
Prowler Nunhems 338 hi 440 ij 83.8 b-e 8.4 fg 135
Red Flavor Wannamaker 315 hi 356jk 51.0 g 12.7 a-c 141
Red Rhone Wannamaker 159 i 201 k 36.0 h 8.6 e-g 141

z Source: Wannamaker Seeds, St. Matthews, SC (www.wannamakerseeds.com), Sakata Seed America, Morgan Hill, CA (www.sakata.com), Shamrock Seed Co.,
Salinas, CA (www.shamrockseed.com), and Nunhems USA, Inc., Parma, ID (www.nunhemsusa.com).
Y Mean separation Duncan's multiple range test, 5% level.




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