Advanced Agricultural Services, Inc
Our reports come in an Excel
document listing the results and statistics, accompanied by a Word document
with summaries and extra comments.
Results
Form (Excel)
After a line identifying your ranch
and block, the report lists a table of the fruitfulness data, with the number
of bunches in each bud, or one of the five categories of unfruitful buds.
At the bottom of the data table in
each column for bud position is the percent fruitful (buds with at least 1
bunch), mean or average number of bunches per bud, and the cumulative total
(predicted number of buds if the spurs are cut to that bud position).
|
Spur |
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1 |
0 |
1 |
1 |
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2 |
1 |
0 |
1 |
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3 |
1 |
1 |
2 |
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4 |
1 |
0 |
1 |
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5 |
2 |
2 |
2 |
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6 |
S |
1 |
1 |
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7 |
1 |
2 |
1 |
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8 |
B |
1 |
2 |
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9 |
0 |
1 |
2 |
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10 |
2 |
1 |
1 |
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% Fruitful |
60% |
80% |
100% |
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Mean No. of Bunches |
0.80 |
1.00 |
1.40 |
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Cumulative |
0.80 |
1.80 |
3.20 |
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Next we show the overall average
bunches per bud, and the predicted number of bunches for the maximum number of
buds. This will be the same as the last
cumulative number, unless one or more buds were missing or lost.
1.07 bunches per bud
3.20 bunches per 3-bud spur
The next table show the percentages
of buds that are fruitful or unfruitful, the percentages with single, double,
and triple bunches, and the percentages in each of the five unfruitful
categories;
No
Fruit (0): the bud has a healthy shoot bud but never developed a bunch
primordium.
Sick
(S): a bunch is present but it is starting to develop necrosis unrelated to an
abscission layer.
Dead
(D): a bunch is present but dead from necrosis unrelated to an abscission
layer.
Burnt
(B): the primary bud is entirely dead from necrosis at an abscission layer.
Absent
(A): no bud is present at the node.
For more discussion of these
unfruitful categories, read Grape Bud Fruitfulness.
Bud Condition
|
Total Fruitful |
80% |
Total Unfruitful |
20% |
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|
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|
Normal ( 1 ) |
53% |
No Fruit ( 0 ) |
13% |
|
Double ( 2 ) |
27% |
Sick ( S ) |
3% |
|
Triple ( 3 ) |
0% |
Dead ( D ) |
0% |
|
Four ( 4 ) |
0% |
Burnt ( B ) |
3% |
|
Five ( 5 ) |
0% |
Absent (A) |
0% |
The last three tables show bunch
size and bud mites.
First is the number of bunches
counted in each size category, under each bud position and overall. Under that is a second table showing the same
data as percentages of the total number of fruit at each bud position and
overall.
The third table shows of buds
infested with bud mites, and with bunches damaged or destroyed by the bud
mites. If the block has no bud mites, this table is not included.
Bunch Size Range and Bud Mites
|
|
Bud 1 |
Bud 2 |
Bud 3 |
Total |
|
Small |
3 |
4 |
4 |
11 |
|
Medium |
4 |
3 |
7 |
14 |
|
Large |
1 |
3 |
3 |
7 |
|
Huge |
0 |
0 |
0 |
0 |
|
|
Bud 1 |
Bud 2 |
Bud 3 |
Percent |
|
Small |
38% |
40% |
29% |
34% |
|
Medium |
50% |
30% |
50% |
44% |
|
Large |
13% |
30% |
21% |
22% |
|
Huge |
0% |
0% |
0% |
0% |
|
|
Bud 1 |
Bud 2 |
Bud 3 |
Total |
Percent |
|
Mites |
4 |
3 |
2 |
9 |
30% |
|
Damaged |
4 |
3 |
0 |
7 |
20% |
|
Destroyed |
1 |
1 |
1 |
3 |
9% |
|
% Infested |
40% |
30% |
20% |
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|
At the bottom of the report form are five statistics to help growers
judge the limitations of the sample and decide how large a sample to take next
time. All of these statistics are
related to the mean or average number of bunches per bud.
A more thorough explanation of these statistics is on the How Many
Samples Should You Send page.
The sample size is the number of buds in the sample.
The precision is one divided by the sample size, which is the
contribution of each bunch to the mean.
The standard deviation (SD) is a measure of the variability of the
sample. A uniform sample, such as all 1s
or all 0s, has an SD of zero. This
report has a SD of .69, which shows a high amount of variation.
The margin of error gives a likely upper and lower limit for the
mean. A high standard deviation
increases the margin of error; a high sample size decreases the margin of
error.
The last statistic estimates how many buds would need to be sampled to
produce a margin of error of 0.1. With
3 buds per spur, this grower would need 43 spurs to reach that level of
accuracy.
Statistics on bunches per bud
30 Number of buds in sample
0.033 Precision (change from subtracting
1 bunch from total)
0.691 Standard Deviation of bunches per
bud
0.21 Margin of Error with 90%
confidence