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Fig. 7. Omnidirectional semi-variograms of the root collar diameter of the (2+0) white spruce seedlings. The table indicates the estimated theoretical model parameters for each of the sampling days (a: range; C0: nugget effect; C0 + C1: total variance; R2: cross- validation; C1/(C0 + C1): spatial dependence; n: number of containers sampled). For each container sampled, the data represent the average root collar diameter of the seedlings in the five central cavities through which the MP-917 probes were inserted.
