Ravaz Index Yield Pruning Ratio
Compute matched fruit-yield/dormant-pruning Ravaz ratios and pooled biomass-exposure ratio, not an unweighted ratio mean or a prescribed balanced-vine range.
Description
The Ravaz index compares fruit yield with dormant pruning biomass from matched vines.
The Ravaz index compares fruit yield with dormant pruning biomass from matched vines. Pooled biomass ratios differ from an average of individual ratios.
Compute matched fruit-yield/dormant-pruning Ravaz ratios and pooled biomass-exposure ratio, not an unweighted ratio mean or a prescribed balanced-vine range.
When to use Ravaz Index Yield Pruning Ratio
Use this tool to compute matched fruit-yield/dormant-pruning Ravaz ratios and pooled biomass-exposure ratio, not an unweighted ratio mean or a prescribed balanced-vine range.
Prepare vineyard measurements, dates or block records for the intended growing period. Keep weights, counts and weather observations in the stated units.
How to use Ravaz Index Yield Pruning Ratio and understand its results
- Prepare vineyard measurements, dates or block records for the intended growing period. Keep weights, counts and weather observations in the stated units.
- Enter matchedVineFruitYieldKg, matchedVineDormantPruningKg using the field table and calculation rules, then run the tool.
- Read perVineRavazIndices, pooledRavazIndex. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| matchedVineFruitYieldKg | Matched vine fruit yield kg | list of number | Required |
| matchedVineDormantPruningKg | Matched vine dormant pruning kg | list of number | Required |
Align nonnegative fruit mass with positive pruning mass. Return each vine's ratio and the pooled ratio.1
Paired lists must be nonempty and have equal lengths.
Ravaz = fruit kg/pruning kg; pooled = Σ fruit/Σ pruning Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| perVineRavazIndices | Per vine ravaz indices | list of number |
| pooledRavazIndex | Pooled ravaz index | number |
{
"input": {
"matchedVineFruitYieldKg": [
10,
15
],
"matchedVineDormantPruningKg": [
1,
3
]
},
"output": {
"perVineRavazIndices": [
10,
5
],
"pooledRavazIndex": 6.25
}
}Limitations and assumptions
Measurement seasons and mass bases must match; no universal balanced-vine range is supplied.
Numbers and computed results must be finite; overflow produces an error. Numeric lists are limited to 100,000 entries; the rules above may require smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Pruning Weight Per Vine: Pool actual pruning inventories by sampled vine counts while explicitly separating fresh/dry bases; not simple unweighted sample means, wood nutrient content or vine vigor diagnosis. For a complementary task, use Crop Estimate Cluster Count Method: Expand equal-probability sampled vine cluster counts to block yield with caller mature-cluster mass and count-sampling error only; no weight/selection uncertainty, harvest guarantee or optimum crop load.
References
-
Ravaz Index Yield Pruning Ratio — tool.io
Similar or alternative tools
- Pruning Weight Per Vine
Pool actual pruning inventories by sampled vine counts while explicitly separating fresh/dry bases; not simple unweighted sample means, wood nutrient content or vine vigor diagnosis.
- Crop Estimate Cluster Count Method
Expand equal-probability sampled vine cluster counts to block yield with caller mature-cluster mass and count-sampling error only; no weight/selection uncertainty, harvest guarantee or optimum crop load.