Accuracy of Regeneration Stocking Estimates: Tests with Simulated Data

MacLeod, Dave

doi:10.5558/tfc53077-2

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…This clustered design was employed because of the substantially lower sampling time per plot or per distance compared to a design of single plots. A study of simulated seedling populations (MacLeod 1977) suggested that this represented a reasonable compromise between accuracy and sampling time required.…”

Section: Survey Design and Sampling Proceduresmentioning

confidence: 99%

A Field Comparison of Distance and Plot Methods for Regeneration Surveys

MacLeod¹,

Chaudhry²

1979

The Forestry Chronicle

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A survey method involving the measurement of the distance from a sam~le ~o i n t to the nearest seedlina was com~ared with the usual stocked plot approach for e~timatini~ercent 4ocking to 1-milacre (4 m2) plots2. Ten separate surveys were run for each method over a 100-acre (40 ha) test area, and the results compared with respect to stocking accuracy and practical utility. The distance approach was found to be more efficient, requiring on the average substantially fewer samples to achieve the same level of accuracy. Time requirements per sample were slightly greater than for the stocked plot approach and the equipment was more cumbersome.The theoretical'basis for estimating stocking from a distance survey is described, and an estimation procedure is presented.On compare une methode d'inventaire utilisant le mesurage de la distance d'un point dlBchantillon au semis le plus proche avec la methode courante de la placette pourvue pour evaluer en pourcentage le materiel relatif de placettes d'un milli-acre (4m2). On a execute dix inventaires differents pour chaque mBthode sur un terrain-test de 100 acres pour ensuite en Bvaluer les resultats tant qu'a la presence exacte de materiel relatif et le cBte pratique. On a trouve que la methode par distance Btait plus efficace, requerait en moyenne moins d'echantillonnage pour obtenir le mgme degre d'exactitude. Le temps pour mesurer un echantillon etait un peu plus long que pour I'approche par placette pourvue et I'outillage un peu plus encombrant.Le principe qui sert en theorie h &valuer le materiel relatif par inventaire h distance y est dBcrit ainsi qu'une technique pour faire 1'6valuation.

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Section: Survey Design and Sampling Proceduresmentioning

confidence: 99%

A Field Comparison of Distance and Plot Methods for Regeneration Surveys

MacLeod¹,

Chaudhry²

1979

The Forestry Chronicle

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“…The sequential sampling procedure of Dick (1963) is a useful survey method for such situations. In recent years, computers have been used to determine regeneration accuracies for different sampling methodologies (MacLeod 1977) or complex stands (Hassani et al 2004).…”

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confidence: 99%

Regeneration standards: What has the past to show us?

Armson¹

2005

The Forestry Chronicle

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The historical development of regeneration surveys in Canada and the associated development of methodologies and standards are reviewed. The importance of sampling methodology and quadrat size in determining stocking values is stressed. The use of technically-based stocking data to inform the public about regeneration is questioned. It is argued that there is need for a new and imaginative measure that is both factual and can be readily comprehended by the public. This presents a challenge to foresters and the governments when reporting on the state of the public's forests.

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Accuracy of Regeneration Stocking Estimates: Tests with Simulated Data

Cited by 2 publications

References 5 publications

A Field Comparison of Distance and Plot Methods for Regeneration Surveys

A Field Comparison of Distance and Plot Methods for Regeneration Surveys

Regeneration standards: What has the past to show us?

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