Pruning Knot Index Live Crown Limit Checker

Audit actual knot/wood diameter contrasts alongside independently specified retained live-crown criterion, distinct from pruning lift alone, no pruning treatment or future wood quality prediction. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.

Description

Pruning review can compare knot size with bole diameter and retained crown fraction with a supplied limit.

Pruning review can compare knot size with bole diameter and retained crown fraction with a supplied limit.^[1]

These ratios summarize measured geometry without determining wood grade, tree response or an optimal pruning prescription. Use this tool to calculate pruning knot index live crown limit checker from the supplied measurements and assumptions.

When to use Pruning Knot Index Live Crown Limit Checker

Use this tool to calculate pruning knot index live crown limit checker from the supplied measurements and assumptions. Establish the species/site, survey protocol, units, sampled area or exposure, and the independently chosen reference or model.

How to use Pruning Knot Index Live Crown Limit Checker and understand its results

Establish the species/site, survey protocol, units, sampled area or exposure, and the independently chosen reference or model.
Enter observedKnotDiametersMm, observedBoleDiametersMm, observedCurrentLiveCrownLengthsM, callerRemovedLiveCrownLengthsM, callerMinimumRetainedCrownFraction, using the field meanings and rules below, then run the tool.
Read observedKnotDiameterRatios, retainedLiveCrownFractions, callerCrownReviewIndices. Interpret the fields using their units, signs and evidence conventions below.
If input validation fails, correct the reported field and run again. Before applying the result, check reference scope, model assumptions and any missing evidence or placeholder values.

Input field	Meaning	Value type	Requirement
observedKnotDiametersMm	Observed knot diameters mm	list of number	Required
observedBoleDiametersMm	Observed bole diameters mm	list of number	Required
observedCurrentLiveCrownLengthsM	Observed current live crown lengths m	list of number	Required
callerRemovedLiveCrownLengthsM	Caller removed live crown lengths m	list of number	Required
callerMinimumRetainedCrownFraction	Caller minimum retained crown fraction	number	Required

Enter nonempty aligned nonnegative knot diameters, positive bole diameters and current live-crown lengths, and removed live-crown lengths from zero through current length. Supply a minimum retained fraction in [0,1]. Return knot/bole ratios and 1−removed/current fractions, and flag zero-based indices strictly below the supplied minimum. Equality does not flag; knot diameter is not required to be less than bole diameter.

knotRatio_i=knotDiameter_i/boleDiameter_i; retainedFraction_i=1−removedCrown_i/currentCrown_i; review={i:retainedFraction_i<minimum}

Use the exact units, boundary rules, ordering and missing-evidence conventions above.

Output field	Meaning	Value type
observedKnotDiameterRatios	Observed Knot Diameter Ratios; follow the units, sign, ordering and evidence convention stated above	list of number
retainedLiveCrownFractions	Retained Live Crown Fractions; follow the units, sign, ordering and evidence convention stated above	list of number
callerCrownReviewIndices	Caller Crown Review Indices; follow the units, sign, ordering and evidence convention stated above	list of number

json

{
  "input": {
    "observedKnotDiametersMm": [
      5,
      10
    ],
    "observedBoleDiametersMm": [
      100,
      100
    ],
    "observedCurrentLiveCrownLengthsM": [
      5,
      5
    ],
    "callerRemovedLiveCrownLengthsM": [
      1,
      2
    ],
    "callerMinimumRetainedCrownFraction": 0.7
  },
  "output": {
    "observedKnotDiameterRatios": [
      0.05,
      0.1
    ],
    "retainedLiveCrownFractions": [
      0.8,
      0.6
    ],
    "callerCrownReviewIndices": [
      1
    ]
  }
}

Limitations and assumptions

These ratios summarize measured geometry without determining wood grade, tree response or an optimal pruning prescription. Interpretation depends on the units, sampling scope and exact model described above.

All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse evidence arrays fail validation; the specific bounds and alignment requirements are stated above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful result reporting false, no matches or missing evidence.

Alternative or Complementary methods

Use Crop Tree Release Spacing RD-Ratio Tool for this related task: Crown spacing can be compared with the sum of independently measured crown radii.

Use Kozak Taper Curve Calculator when its separate inputs and assumptions fit the question: A Kozak 1969-style taper relation expresses squared relative diameter as a quadratic in relative height.

References

Pruning Knot Index Live Crown Limit Checker — tool.io

Similar or alternative tools

Crop Tree Release Spacing RD-Ratio Tool
Crown spacing can be compared with the sum of independently measured crown radii.
Kozak Taper Curve Calculator
A Kozak 1969-style taper relation expresses squared relative diameter as a quadratic in relative height.