EVAlUA liON OF PROCEDURES FOR
ESTIMATING CITRUS FRUIT YIELD
GROUND
PHOTOGRAPHY
ST A TISTICAL
REPORTING
SERVICE
- U. S. DEPARTMENT
OF AGRICULTURE
CONTENfS
Surmnary and Conclusions
Background
.
Sample Selection
.•••••.••
Presurvey Procedures
Field Procedures
......•..
Fruit C01D1ts
Expansion of Tenninal Counts
Analysis of Expanded Data
Time Requirements
••.••...•.••....•
Optimum Allocation
•.....•••.••.••.
Comparison of Limb Count Estimators
Ground Photography
••••.•••••.•.•.
Comparison of Estimating Systems
Fruit Size Study
.
Frui t Droppage Study
Remote Sensing Research
Fruit Quality Research
Recommendations
Appendix A
Appendix B
..
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Page
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53
Washington,
D. C.
20250
i
February 1972
Table
Page
1. Quality control indications of COtDlting accuracy, selected
citrus blocks, Texas, 1969 growing season •••••••••••.. ! ••••••
7
2. Average fruit and variance components:
Equal probability
expansion, selected citrus blocks, Texas, 1969 growing
se ason
10
3. First-stage mapping:
Minutes per tree, selected citrus blocks,
Texas,
1969 growing season
12
4.
First-stage mapping:
Minutes per primary, selected citrus
blocks, Texas, 1969 growing season .••••••••••..••.••••••.••••
12
S. Second-stage mapping:
Minutes per primary, selected citrus
blocks, Texas, 1969 growing season •••••••••••••.•••••••••••••
13
6.
Second-stage mapping:
Minutes perterminal, selected citrus
blocks, Texas, 1969 growing season .••.•••••••••••.•••••••••••
13
7. Fruit cOtDlting: Minutes per tenninal limb, selected citrus
blocks, Texas, 1969 growing season ••.....••••..•....•.••...•.
14
8.
Fruit counting:
Minutes per fruit, selected citrus blocks,
Texas
1969 growing season
14
9. Optimization results:
citrus blocks, Texas,
Equal probability expansions, selected
1969 growing season
.
17
10.
11.
12.
13.
14.
15.
16.
Average number of primary limbs per tree, selected citrus
blocks, Texas, 1969 growing season •••••••••••••••••••••••••••
18
Average number of terminal, limbs per primary, selected cit