## 3 Results
### Base Cation Harvesting Scenarios
\begin{table}
\begin{tabular}{|c|c c c|} \hline
**Decreasing Trend** & & & **Long Term Linear Trends** \\
**Increasing Trend** & & **Ca** & **Mg** & **K** \\
**Site (Tree Species) ( Years of Monitoring)** & **Soil Type (WRB, 2016)** & **kg ha-1y-1** & **kg ha-1y-1** \\ \hline [PERSON] (Oak) (24 years) & Eutter Vertical & \(\mathbf{r^{2}=0.24}\) (\(p=0.01\)) & \(\mathbf{r^{2}=0.14}\) (\(p=0.06\)) & \(\mathbf{r^{2}=0.03}\) (\(p=0.37\)) \\ Savenras (Oak) (10 years) & Eutter Vertical & \(\mathbf{r^{2}=0.01}\) (\(p=0.906\)) & \(\mathbf{r^{2}=0.01}\) (\(p=0.915\)) & \(\mathbf{r^{2}=0.03}\) (\(p=0.051\)) \\ Grizzelda (Oak) (11 years) & Cambic Podzol & \(\mathbf{r^{2}=0.03}\) (\(p=0.281\)) & \(\mathbf{r^{2}=0.08}\) (\(p=0.383\)) & \(\mathbf{r^{2}=0.17}\) (\(p=0.213\)) \\ Theftord (Scots pine) (24 years) & Ferralic Aerosol & \(\mathbf{r^{2}=0.01}\) (\(p=0.802\)) & \(\mathbf{r^{2}=0.04}\) (\(p=0.441\)) & \(\mathbf{r^{2}=0.05}\) (\(p=0.293\)) \\ Sherwood (Scots pine) (10 years) & Cambic Podzol & \(\mathbf{r^{2}=0.09}\) (\(p=0.699\)) & \(\mathbf{r^{2}=0.04}\) (\(p=0.787\)) & \(\mathbf{r^{2}=0.09}\) (\(p=0.690\)) \\ Ramnock (Scots pine) (10 years) & Gleyic Podzol & \(\mathbf{r^{2}=0.16}\) (\(p=0.246\)) & \(\mathbf{r^{2}=0.02}\) (\(p=0.676\)) & \(\mathbf{r^{2}=0.09}\) (\(p=0.690\)) \\ Rogate (Scots pine) (10 years) & Podzol & \(\mathbf{r^{2}=0.02}\) (\(p=0.676\)) & \(\mathbf{r^{2}=0.06}\)(\(p=0.001\)) \\ Columbrum (Sitka spruce) (15 years) & Umbreic gleysol & \(\mathbf{r^{2}=0.01}\) (\(p=0.001\)) & \(\mathbf{r^{2}=0.05}\) (\(p=0.676\)) \\ Tummel (Sitka spruce) (10 years) & [PERSON] & \(\mathbf{r^{2}=0.02}\) (\(p=0.791\)) & \(\mathbf{r^{2}=0.361}\) (\(p=0.356\)) & \(\mathbf{r^{2}=0.03}\) (\(p=0.072\)) \\ Llyn Braenne (Sitka spruce) (24 years) & Umbreic gleysol & \(\mathbf{r^{2}=0.04}\) (\(p=0.409\)) & \(\mathbf{r^{2}=0.02}\) (\(p=0.500\)) & \(\mathbf{r^{2}=0.28}\) (\(p=0.020\)) \\ \hline \end{tabular}
\end{table} 
Table 5: Temporal trend analysis for base cation budgets at all ten ICP Forest Level II sites. Linear regressions between cation budgets and time were tested and \(r^{2}\) and \(p\) values are shown. Decreasing trends are highlighted in light grey and increasing trends in dark grey. Significant trends at \(p<0.05\) are highlighted in bold and marginally significant trends at \(p<0.1\) are also underlined. The results indicate that the Ca budget is positive for both CH and WTHB scenarios on all soil types except podzols, where the budget is negative for crops of YC \(>\) 12 under WTHB management. The WTHG scenario increased the number of soil types with negative Ca balances for first rotation crops, including for YC \(>\) 20 on brown earths, YC \(>\) 8 on podzols, and YC \(>\) 18 on deep beats. In contrast, the Mg budget was positive for all three harvesting scenarios on gley (surface and ground water) soils, brown earths, podzols and peaty gleys. The only exception was the WTHG scenario for SS YC \(>\) 18 on deep beat. The K budget was positive for all three harvesting scenarios on all soil types except for deep beats, where WTHB resulted in a negative budget for YC \(>\) 16 and WTHG a negative balance for YC \(>\) 8. Figure 6: Forest Mg budget for Sitka spruce first rotation, YC 6-24, on five main forest soil types.