Fig. 3From: Modelling of root reinforcement and erosion control by ‘Veronese’ poplar on pastoral hill country in New ZealandRoot distribution curves at different distances from the tree stem and model calibration results. Points indicate measurements, and coloured lines show the results of the calibrated model: a 1-year-old poplar; b, c 2-year-old poplar (the data in b and c were split to allow a better visualisation of the data). Dashed lines show the 95 % confidence interval of the model results. The number of fine roots is given per linear metre of soil trench widthBack to article page