Figure 2From: Inventory estimates of stem volume using nine sampling methods in thinned Pinus radiata stands, New ZealandBias in the estimate of stem volume for eight of the sampling methods studied. Bias in the average sample estimate of mean stem volume, as a percentage of the average estimate, by stand and sampling method. Results from the Stand-boundary sampling method are not shown as the bias was an order of magnitude larger than for most other methods.Back to article page