EVALUATION OF SOIL MEDIA FOR PRODUCTION OF GREENHOUSE
GROWN TOBACCO TRANSPLANTS
Eddie McGriff, Paul Bertrand and Mark von Waldner
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2008 GEORGIA TOBACCO COUNTIES
16,000 HARVESTED ACRES33,600,000 POUNDS PRODUCED$69,564,849
Source: 2009 USDA National AgriculturalStatistics Service
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2008 GEORGIA TOBACCO COUNTIES
COFFEE COUNTY ISGEORGIA’S #1
TOBACCO COUNTY2,380 ACRES
5,399,000 POUNDS
Source: 2009 USDA National AgriculturalStatistics Service
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2008 GEORGIA TOBACCO COUNTIES
Source: 2009 USDA National AgriculturalStatistics Service
3,000,000 + POUNDS
2,000,000 -2,999,999 POUNDS
300,000 -1,999,999 POUNDS
LESS THAN 300,000 POUNDS
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COFFEE CO. PLANT GROWERSEXPECT A YIELD OF USEFUL PLANTS
> 93 %
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CALLED BY THREE COMMERCIAL PLANT GROWERS IN SAME
COMMUNITYTO HELP WITH
STAND PROBLEMS
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CARVER PLANT CO.16 PLANT HOUSES
8.5 MILLION SEEDLINGS
DORMINEY PLANT CO.16 PLANT HOUSES
8.5 MILLION SEEDLINGS
GRANTHAM PLANT CO.10 PLANT HOUSES
4 MILLION SEEDLINGS
2010
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COFFEE CO. PLANT GROWERSEXPECT A YIELD OF USEFUL PLANTS
> 93 %
PAST SEVERAL YEARS YIELDSHAVE DROPPED TO
85 - 88 %
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OBSERVATIONSMORE OF A PROBLEM IN SLOWER GROWING TRANSPLANTS SUCH AS NC 297 AND K 326LESS OF PROBLEM IN MORE VIGOROUSLY TRANSPLANTS SUCH AS NC 196OVERHEAD WATERING SIGNIFICANTLY REDUCED THE PROBLEM
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PLANT VALUEPRODUCE 21,000,000 SEEDLINGSESTIMATED LOSS: ~ 25 / TRAY
(2,170,000)PLANT VALUE = $0.03 EACHTRAYS NOW SOLD ON 200 / TRAYANNUAL LOSS = ~ $65,000LOSS DOES NOT INCLUDE COST
OF DUMPING/RESEEDING
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IN 2008 CARVER PLANT CO. ALONE DUMPED AND RESEEDED
7,000 OF 38,000 TRAYS DUE TOPOST GERM. PLANT LOSS
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SUGGESTED CAUSESSEED QUALITYPATHOGENSTRAY SANITATIONHOUSE TEMPERATUREWATER QUALITYMEDIA
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AFTER UNUSUAL PLANT LOSSIN 2009 TWO PLANT GROWERS
SET UP SIDE-BY-SIDEMEDIA COMPARISONS
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CAROLINA CHOICE
2010
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CAROLINA GOLD
2010
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THE GROWER TRIALSWERE EVALUATED BY ROOT COUNT
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HOUSE #6NC-297
CAROLINA GOLD97.5 a
CAROLINA CHOICE94.6 b
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HOUSE #5NC-297
CAROLINA GOLD96.8 a
CAROLINA CHOICE88.9 b
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HOUSE #3NC-297
CAROLINA GOLD95.5 a
CAROLINA CHOICE93.7 a
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HOUSE #8NC-71
CAROLINA GOLD95.4 a
CAROLINA CHOICE93.6 a
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LOTT HOUSENC-71
SUNSHINE83.1 a
CAROLINA CHOICE72.9 b
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AT THE SAME TIME GROWERS WERESETTING UP SIDE-BY-SIDE TRIALS
REPLICATED TRIALS WERE SET-UP AT TWO LOCATIONS
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DORMINEY TRIALSEEDED 19 FEB. 200910 TRAYS OF EACH MEDIA– CAROLINA CHOICE– CAROLINA GOLDSTAND COUNTS MADE 35, 41, 49
DAYS AFTER SEEDING
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DORMINEY DATA
MEDIADAY35
DAY41
DAY49
GOLD 90.8 a 91.0 a 85.0 aCHOICE 81.1 b 79.3 b 74.0 b
NC-71
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ATKINSON CO. TRIALSEEDED 01 APRIL 20098 TRAYS OF EACH MEDIA– CAROLINA CHOICE– CAROLINA GOLDSTAND COUNTS MADE 21, 28, 35
DAYS AFTER SEEDING
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ATKINSON CO. DATA
MEDIADAY21
DAY28
DAY35*
GOLD 94.6 a 92.6 a 88.9 aCHOICE 92.8 b 91.9 a 81.3 a
K-326
* ROOT COUNTS
2010
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IN DECEMBER OF 2009A LARGER TRIAL WAS
SET UP AT THE CARVERPLANT FARM
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CARVER TRIALSEEDED 04 DEC. 20096 MEDIA
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MEDIA USEDFRESH CAROLINA CHOICE09 CAROLINA CHOICE (L. IVEY)09 CAROLINA CHOICE (C. CARVER)FRESH SUNSHINE MIXFRESH CAROLINA GOLD (W/ PERLITE)FRESH CAROLINA GOLD (W/O PERLITE)
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CARVER TRIALSEEDED 04 DEC. 20096 MEDIA3 SEED LOTS
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SEED LOTS USEDALL FROM SEALED CANS (NEW SEED)GOLD LEAF K-326GOLD LEAF NC-297CROSS CREEK K-326
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CARVER TRIALSEEDED 04 DEC. 20096 MEDIA3 SEED LOTS5-7 TRAYS OF EACH MEDIA/SEED
FLOATED IN WATER W/ & W/O ACID
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WATER CHEMISTRY
ACIDADDED12/4/09
NOACID
12/4/09
ACIDADDED*
NOACID*
ph 6.5 7.9 6.3 6.9
ALKALINITY 26 116 43 111
* AFTER FERTILIZER WAS ADDED
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CARVER TRIALSEEDED 04 DEC. 20096 MEDIA3 SEED LOTS5-7 TRAYS OF EACH MEDIA/SEED
FLOATED IN WATER W/ & W/O ACIDSTAND COUNTS MADE 18, 38
DAYS AFTER SEEDING
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RESULTSOF
CARVER TRIALMEDIA
THERE ARE MEDIA / SEED INTERACTIONS IN SOME CASES
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% STAND (WATER WITH ACID)MEDIA 18 DAYS 38 DAYSC. GOLD W/O P 95.5 92.7C. GOLD W/ P 95.3 94.8SUNSHINE 93.4 93.7C. CHOICE (NEW) 91.9 93.7C. CHOICE (IVY) 90.6 94.3C. CHOICE (CARVER) 88.8 89.8LSD (0.05) 1.6 1.6DATA COMBINED FOR SEED LOT
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% STAND (WATER W/O ACID)MEDIA 18 DAYS 38 DAYSC. GOLD W/ P 95.3 95.6C. GOLD W/O P 95.0 95.2SUNSHINE 94.5 95.7C. CHOICE (NEW) 93.5 95.4C. CHOICE (IVY) 90.9 95.6C. CHOICE (CARVER) 90.2 92.5LSD (0.05) 1.6 1.7DATA COMBINED FOR SEED LOT
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STAND AT 38 DAYSMEDIA 38 DAYS 38 DAYSC. GOLD W/ P 95.6 94.8C. GOLD W/O P 95.2 92.7SUNSHINE 95.7 93.7C. CHOICE (NEW) 95.4 93.7C. CHOICE (IVY) 95.6 94.3C. CHOICE (CARVER) 92.5 89.8LSD (0.05) 1.7 1.6DATA COMBINED FOR SEED LOT
WITHOUT ACID WITH ACID
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RESULTSOF
CARVER TRIALSEED
THERE ARE MEDIA / SEED INTERACTIONS IN SOME CASESMORE VIGOROUS SEED ELIMINATED INTERACTIONS
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% STAND (WATER WITH ACID)SEED % GERM 18 DAYS 38 DAYS
GL NC-297 94 94.7 94.6CC K-326 90 93.9 93.3GL K-326 95 89.8 91.5LSD (0.05) 1.1 1.1---
DATA COMBINED FOR MEDIA
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% STAND (WATER W/O ACID)SEED % GERM 18 DAYS 38 DAYS
GL NC-297 94 94.8 95.8CC K-326 90 93.1 95.7GL K-326 95 91.5 95.5LSD (0.05) 1.1 ns---
DATA COMBINED FOR MEDIA
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STAND AT 38 DAYSSEED % GERM W/O ACID W/ ACID
GL NC-297 94 95.9 94.6CC K-326 90 94.8 93.3GL K-326 95 93.9 91.5LSD (0.05) 1.2 1.1---
DATA COMBINED FOR MEDIA
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CONCLUSIONSCONSISTENTLY CAROLINA CHOICE PURCHASED IN 2009 PERFORMED POORER THAN OTHER TESTED MEDIASIN 2010 CAROLINA GOLD W/ OR W/O PERALITE HAD THE BEST STANDS BUT ALSO A HIGHER INCIDENCE OF SPIRAL ROOTWHY?ADDITION OF ACID MADE NO DIFFERENCE IN FINAL PLANT STANDS WITH ALL MEDIA/SEED COMBINATIONS
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