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Jay, WFREC Research Report WF96-4 February, 1996
,;r on Sc ien.ce
Fertility Trials with Florakirk Bermudagrass and Chi'cry
and Harvest Date Trial with Florigraze Rhizoma PeTnart
L. S. Dunavint FEB 26 1996
Conversion factors are given in Table 1 for the use of tho~ ipvsit;adFlffIt to
convert to metric units. Climatological data are presented in Table 2.
Florakirk Bermudagrass.
This reports data for 1995 from a trial which has been conducted for several
years. The plots were established to Florakirk in 1988. They were located on
an Orangeburg sandy loam soil (Typic Paleudult). The fertility treatments
were very low, low, medium, high, and very high. The very low treatment was
31.25 pounds per acre of N per year, and each succeeding rate was twice the
preceding rate. All were balanced in a 2-1-1 NPK regime. All of the P and K
and 1/3 of the N was applied on 10 April 95. Another 1/3 of the N was applied
on 7 July 95, and the final 1/3 was applied on 14 August 95. Harvests were
obtained on 15 May, 30 June, 31 July, 29 Aug., and 27 Sept. 95. Yields of dry
matter varied from 3,570 pounds per acre at the very low level to 15,580
pounds per acre at the very high level. Data are presented in Table 3.
Chicory.
This fertility trial was imposed on plots of chicory planted on 18 March 94.
They were located on an Orangeburg sandy loam soil (Typic Paleudult). The
treatments were 100, 200, 300, and 400 pounds per acre of ammonium nitrate
applied following harvest. Fertilization in 1995 included 400 pounds per acre
of 8-24-24 fertilizer on 10 April 95 and ammonium nitrate at the indicated
rates on 7 June, 10 July, and 18 August. Harvests were made on 5 June, 10
July, 11 Aug., and 8 Sept. 95. Dry matter yields are reported in Table 4 and
indicate no response by the chicory to N fertilization in this trial. The
data are for chicory only and do not include the total biomass from the plots
which included a lot of weedy material after the first harvest. Season-total
dry matter (including weeds) is given in Table 5 and does show a response to
N. It is probable that the lack of response by chicory was due to a lot of
variability in stands which was more apparent after the first harvest. Other
observations with chicory at the WFREC, Jay have indicated difficulty in
obtaining uniform stands.
Florigraze Rhizomr Peanut.
A times-of-harvest trial was conducted with Florigraze rhizoma peanut in 1995.
Two old areas of peanut were used in the trial. One, located on an Orangeburg
sandy loam soil (Typic Paleudult), was established in December, 1979 and the
other, located on a Red Bay sandy loam soil (Rhodic Paleudult), was established
in January, 1976. The peanut areas were fertilized in 1995 with 300 pounds per
acre of an 0-30-15 fertilizer on 12 May. Each area was divided into four
replications of plots for harvest three, two, and one times each. Plots harvested
three times were harvested on 27 June, 23 Aug., and 19 October. Those harvested
twice were harvested on the August and October dates, and those harvested once
were on the October date. Yield data are given in Table 6. On both soils, there
was no real difference between yields when harvested two or three times, but a
considerably lower yield was obtained from a single harvest.
tAssociate Professor of Agronomy.
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I
Tot
Table 1. Conversion factors from English to metric units.
English Unit "Factor' Metric Unit
pounds per acre multiply by 1.12 kilograms per hectare
pounds per acre multiply by 0.00112 metric tons per hectare
tons (English) multiply by 0.9072 tons (metric)
tons (English) per acre multiply by 2.24 tons (metric) per hectare
inches multiply by 2.54 centimeters
yards multiply by 0.914 meters
miles multiply by 1.609 kilometers
acres multiply by 0.405 hectares
o Fahrenheit ......0.556.(9 F .32) : ::: :::.Celsius
Table 2. Climatological data for the West Florida Research and Education Center. Jay, 1995.
Precipitation Temperature Average Daily Solar Radiationt
inches _F Watts per square meter
Month 1995 47-year Avg. Avg. Max. Avg. Min. 1995 9-year Avg.
January 5.79 5.41 61.4 39.7 2868 2311
February 2.91 5.08 66.0 41.1 3762 3186
March 6.86 6.49 71.7 51.7 3982 4158
April 6.14 4.80 77.2 55.0 5447 5416
May 8.21 4.51 86.9 65.7 5873 5374
June 4.22 7.41 90.4 68.0 5829 5306
July 8.30 8.05 92.6 71.4 5410 5206
August 9.90 6.53 92.8 72.3 5801 5179
September 4.23 6.25 89.0 65.9 5301 4591
October 16.85 3.79 80.0 55.5 4450 4124
November 9.05 4.20 67.8 43.6 3250 3187
)ecember 4.71 5.02 61.0 '38.5 2835 2501
:al or Avg. 87.17 67.54 78.1 55.7 4567 4212
tThe solar radiometer
October, and 14 days
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was out of operation during '9 days in June, 4 days in July, 3 days in
in November.
1
I
Tot
Table 1. Conversion factors from English to metric units.
English Unit "Factor' Metric Unit
pounds per acre multiply by 1.12 kilograms per hectare
pounds per acre multiply by 0.00112 metric tons per hectare
tons (English) multiply by 0.9072 tons (metric)
tons (English) per acre multiply by 2.24 tons (metric) per hectare
inches multiply by 2.54 centimeters
yards multiply by 0.914 meters
miles multiply by 1.609 kilometers
acres multiply by 0.405 hectares
o Fahrenheit ......0.556.(9 F .32) : ::: :::.Celsius
Table 2. Climatological data for the West Florida Research and Education Center. Jay, 1995.
Precipitation Temperature Average Daily Solar Radiationt
inches _F Watts per square meter
Month 1995 47-year Avg. Avg. Max. Avg. Min. 1995 9-year Avg.
January 5.79 5.41 61.4 39.7 2868 2311
February 2.91 5.08 66.0 41.1 3762 3186
March 6.86 6.49 71.7 51.7 3982 4158
April 6.14 4.80 77.2 55.0 5447 5416
May 8.21 4.51 86.9 65.7 5873 5374
June 4.22 7.41 90.4 68.0 5829 5306
July 8.30 8.05 92.6 71.4 5410 5206
August 9.90 6.53 92.8 72.3 5801 5179
September 4.23 6.25 89.0 65.9 5301 4591
October 16.85 3.79 80.0 55.5 4450 4124
November 9.05 4.20 67.8 43.6 3250 3187
)ecember 4.71 5.02 61.0 '38.5 2835 2501
:al or Avg. 87.17 67.54 78.1 55.7 4567 4212
tThe solar radiometer
October, and 14 days
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was out of operation during '9 days in June, 4 days in July, 3 days in
in November.
Table 3. Florakirk bermudagrass, WFREC, Jay. 1995.
15 May 30 June
Fertility level*
Very low
Low
Medium
High
Very high
LSD (t .05)
510
1080
1480
2090
3990
800
360
720
680
940
2420
510
Dry Matter
31July 29 Aug.
Pounds per acret
1060 1040
1340 1580
2140 2080
3940 2260
4530 3170
700 550
'27 Sept. Total
600
610
640
780
1470
400
3,570
5,330
7,020
10,010
15,580
1,880
tPounds per acre X
1.12 = kilograms per hectare.
*Very low = 31.25 lb./acre N. Each succeeding rate is twice the pre-
ceding rate. All are balanced in a 2-1-1 NPK regime.
For the season total:
r'= 0.96
S= 3536 + 20.5 (N rate)
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Table 4. Chicory. WFREC, Jay. 1995.
Dry Matter
Pounds per acret
Treatment* 5 June 10 July 11 Aig. 8 Sept. Total
100 1060 600 540 180 2380
200 1170 810 910 310 3200
300 1140 830 970 320 3260
400 1300 840 910 180 3230
LSD (t .05) N.S. N.S. N.S. N.S. N.S.
tPounds per acre X 1.12 = kilograms per hectare.
*Treatments are pounds per acre of ammonium nitrate
following harvest.
In addition to LSD, linear regression was calculated
and r = 0.47.
PLANTED: March 18, 1994.
SOIL: Orangeburg sandy loam (Typic Paleudult).
FERTILIZER: 400 pounds per acre of 8-24-24 on 10 April 95
and ammonium nitrate at indicated rates on 7
June, 10 July, and 18 August.
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UNIVERSITY OF FLORIDA
11I1111111i III I III
31262 07468 380 5
Table 5. Chicory and weeds, WFREC, Jay 1995.
Season-total dry matter
Treatment ... Pounds per acret
100 3340
200 4770
300 4860
400 6240
LSD (t .05) 980
tPounds per acre X 1.12 = kilograms per hectare.
*Treatments are pounds per acre of ammonium ni-
trate following harvest.
In addition to LSD, linear regression was
calculated and r = 0.84.
PLANTED: March 18, 1994.
SOIL; Orangeburg sandy loam (Typic Paleudult).
FERTILIZER: 400 pounds per acre of 8-24-24 on 10
April 95, and ammonium nitrate at
indicated rates on 7 June, 10 July, and
18 August.
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Table 6. Florigraze rhizoma peanut WFREC, Jay. 1995.
Dry Matter
Pounds per'acret
Times harvested* Oranrgeburg Soil Red Bay Soil
Three (June, Aug., Oct.) 5130 6290
Two (Aug., Oct.) 5340 6140
One (Oct.) 3580 3590
LSD (t .05) ...... '770 1..020
tPounds per acre X 1.12 = kilograms per hectare.:.
*Harvest dates were 27 June, 23 Aug., and 19 Oct..
ESTABLISHED: The stand on the Orangeburg soil was
established in December, 1979, and the
stand on the Red Bay soil was establish-
ed in January, 1976.
SOIL; Orangeburg sandy loam (Typic Paleudult).
Red Bay Sandy loam (Rhodic Paleudult).
FERTILIZER: 300 pounds per acre of 0-30-15 on 12 May
95.
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