New Zealand Journal of Forestry Science

Table 2 Coefficients of the models fitted to semivariograms for ordinary kriging (OK) and PLS regression kriging (RK) models for the 300 Index and Site Index

From: Characterising prediction error as a function of scale in spatial surfaces of tree productivity

Variable	Units	Model	Nugget	Sill	Range (m)	Lag (m)
OK
300 Index	m³ ha⁻¹ year⁻¹	Exponential	8.6	34.5	47,440	500
Site Index	m	Exponential	3.9	18.2	29,355	500
RK
300 Index	m³ ha⁻¹ year⁻¹	Exponential	6.2	13.5	3186	500
Site Index	m	Exponential	2.2	6.4	2427	500

PLS partial least squares regression, OK ordinary kriging, RK regression kriging

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