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Late-season Fertilizer Increases Return Crop in
Pecans
Tables
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Table 1. Percent #1 kernels from
Cape Fear trees after late-season fertilization. |
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Date Fert. Applied 1 |
% #1 kernel |
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1- Oct |
17 |
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1-Sep |
15 |
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1-Aug |
15 |
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1-Jul |
8 |
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No late fertilizer |
11 |
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Significance: |
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Fert. vs. no Fert P>f = .33 |
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Date effect
P>f = .08 |
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1 Average of 4 rates of application, 50, 100, 150, and
200 lbs. N applied from a |
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16-16-16 fertilizer with micronutrients. |
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Table 2. Three-year avg. percent
kernel for Cape Fear pecan trees which received
late season fertilizer
applications.
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Date applied |
3-yr. avg. % kernel |
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15- Aug |
46.9 |
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15-Sep |
45.7 |
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1-Oct |
45.6 |
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No late season fertilizer |
45.4 |
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Significance: date: NS; fert vs none: NS |
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Table 3. Return crop from
Cape Fear trees which received late season fertilizer
the previous season. |
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Date applied 1 |
lb./acre the following season |
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1-Aug |
1414 |
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1-Sep |
1202 |
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1-Oct |
1009 |
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1-Jul |
882 |
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no late season fertilizer |
711 |
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Significance: |
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Fert. vs. no Fert P>f = .05 |
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Date effect
P>f = .05 |
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1 Average of 4 rates of application, 50, 100, 150, and
200 lbs. N applied from a |
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16-16-16 fertilizer with micronutrients. |
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Table 4. Three-year avg. yields from Cape Fear
pecan trees which received
late season fertilizer applications. |
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Date applied 1 |
Three-year avg. annual yield (lbs./acre) |
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15- Aug |
1207 |
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15-Sep |
1358 |
1319 |
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1-Oct |
1392 |
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No late season fertilizer |
992 |
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Significance: |
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Fert. vs. no Fert P>f = .05 |
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Date effect
NS |
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1 100 lbs. N applied from a 16-16-16
fertilizer with micronutrients in 2000, 2001, and 2002. |
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Yields are from 2000, 2001, and 2002. |
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Table 5. Estimated percent
foliage remaining in October on 'Cape Fear' pecan trees
receiving 100 lbs N
in late season from 16-16-16 fertilizer with micronutrients. |
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Estimated % foliage remaining |
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Late fertilizer? |
2000 |
2001 |
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Yes |
62 a |
73 a |
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No |
56 a |
57 b |
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No differences among dates, 15-Aug, 15-Sep, or 1-Oct. |
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