Cordon Length Spur Spacing

Resolve equally spaced retained spur positions on measured cordons excluding ends, using N-1 intervals rather than N; no universal spur spacing, physical position optimization or vine-quality recommendation.

Description

N retained spur positions create N−1 intervals along a cordon.

N retained spur positions create N−1 intervals along a cordon. Reserved ends reduce the length available for those intervals.

When to use Cordon Length Spur Spacing

Use this tool to resolve equally spaced retained spur positions on measured cordons excluding ends, using N-1 intervals rather than N; no universal spur spacing, physical position optimization or vine-quality recommendation.

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 Cordon Length Spur Spacing 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 cordonLengthsM, retainedSpurCounts, reservedEndLengthsM using the field table and calculation rules, then run the tool.
Read endpointInclusiveSpurSpacingsM, usableCordonLengthsM. 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
cordonLengthsM	Cordon lengths m	list of number	Required
retainedSpurCounts	Retained spur counts	list of number	Required
reservedEndLengthsM	Reserved end lengths m	list of list of number	Required

Align positive cordon lengths, integer spur counts at least two and two nonnegative reserves. Require positive usable length and return that length and endpoint-inclusive spacing.^[1]

Paired lists must be nonempty and have equal lengths.

spacing = (cordon length − both end reserves)/(spur count − 1)

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
endpointInclusiveSpurSpacingsM	Endpoint inclusive spur spacings m	list of number
usableCordonLengthsM	Usable cordon lengths m	list of number

json

{
  "input": {
    "cordonLengthsM": [
      1,
      2
    ],
    "retainedSpurCounts": [
      3,
      5
    ],
    "reservedEndLengthsM": [
      [
        0.1,
        0.1
      ],
      [
        0.2,
        0.2
      ]
    ]
  },
  "output": {
    "endpointInclusiveSpurSpacingsM": [
      0.4,
      0.4
    ],
    "usableCordonLengthsM": [
      0.8,
      1.6
    ]
  }
}

Limitations and assumptions

No universal spacing or physical-position optimization is supplied.

Numbers and computed results must be finite; overflow produces an error. Matrices are limited to 128 rows and 128 entries per row; other numeric lists are limited to 100,000 entries. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Spur Pruning Spur Count Per Vine: Invert caller shoot demand to whole spur counts using retained buds and explicit burst assumptions, retaining expected overage after rounding; not actual fruitful shoots or a pruning prescription. For a complementary task, use Row Length Vine Count: Count endpoint-inclusive geometric vine positions for unequal measured row lengths, spacings and end exclusions; no area-density alias, field planting recommendation or rounding fractional plants.

References

Cordon Length Spur Spacing — tool.io

Similar or alternative tools

Spur Pruning Spur Count Per Vine
Invert caller shoot demand to whole spur counts using retained buds and explicit burst assumptions, retaining expected overage after rounding; not actual fruitful shoots or a pruning prescription.
Row Length Vine Count
Count endpoint-inclusive geometric vine positions for unequal measured row lengths, spacings and end exclusions; no area-density alias, field planting recommendation or rounding fractional plants.