## 3 Results
\begin{table}
\begin{tabular}{l l l l l l l l} \hline \hline
**Rate** & **Particle Size** & **PT** & \begin{tabular}{l} _P (\%)_ \\ _r = 5_ \\ \end{tabular} & \begin{tabular}{l} **AWC (cm\({}^{3}\) cm\({}^{-3}\))** \\ _r = 5_ \\ \end{tabular} & \
\begin{tabular}{l} **\(K_{S}\) (cm h\({}^{-1}\))** \\ _r = 12_ \\ \end{tabular} &
\begin{tabular}{l} **CA (\({}^{\circ}\))** \\ _r = 5_ \\ \end{tabular} \\ \hline
20 Mg ha\({}^{-1}\) & \textless{}125 \(\mu\)m & 300 \({}^{\circ}\)C & 36.64 (0.78) & 0.075 (2 \(\times\) 10\({}^{-3}\)) \({}^{*}\) & 11.19 (1.58) \({}^{*}\) & 64.82 (8.87) \({}^{*}\) \\
20 Mg ha\({}^{-1}\) & \textless{}125 \(\mu\)m & 520 \({}^{\circ}\)C & 36.90 (0.54) & 0.083 (2 \(\times\) 10\({}^{-3}\)) \({}^{*}\) & 9.29 (1.44) \({}^{*}\) & 73.21 (9.81) \({}^{*}\) \\
20 Mg ha\({}^{-1}\) & 125 \(\mu\)m-2 mm & 300 \({}^{\circ}\)C & 41.05 (0.44) \({}^{*}\) & 0.074 (6 \(\times\) 10\({}^{-3}\)) \({}^{*}\) & 40.01 (6.97) \({}^{*}\) & 54.43 (6.81) \({}^{*}\) \\
20 Mg ha\({}^{-1}\) & 125 \(\mu\)m-2 mm & 520 \({}^{\circ}\)C & 39.81 (0.16) \({}^{*}\) & 0.072 (8 \(\times\) 10\({}^{-3}\)) & 37.17 (3.76) \({}^{*}\) & 56.83 (12.19) \({}^{*}\) \\
40 Mg ha\({}^{-1}\) & \textless{}125 \(\mu\)m & 300 \({}^{\circ}\)C & 32.62 (2.38) & 0.098 (6 \(\times\) 10\({}^{-3}\)) \({}^{*}\) & 12.82 (1.35) \({}^{*}\) & 84.45 (6.91) \({}^{*}\) \\
40 Mg ha\({}^{-1}\) & \textless{}125 \(\mu\)m & 520 \({}^{\circ}\)C & 36.18 (1.13) & 0.112 (5 \(\times\) 10\({}^{-3}\)) \({}^{*}\) & 11.77 (1.28) \({}^{*}\) & 91.04 (12.10) \({}^{*}\) \\
40 Mg ha\({}^{-1}\) & \textless{}125 \(\mu\)m-2 mm & 300 \({}^{\circ}\)C & 39.66 (0.64) \({}^{*}\) & 0.103 (1 \(\times\) 10\({}^{-3}\)) \({}^{*}\) & 59.95 (3.48) \({}^{*}\) & 72.82 (20.35) \({}^{*}\) \\
40 Mg ha\({}^{-1}\) & \textless{}125 \(\mu\)m & 520 \({}^{\circ}\)C & 41.34 (0.29) \({}^{*}\) & 0.105 (2 \(\times\) 10\({}^{-3}\)) \({}^{*}\) & 57.82 (5.15) \({}^{*}\) & 77.94 (20.87) \({}^{*}\) \\ Control/sandy soil & & & 37.09 (0.28) & 0.042 (5 \(\times\) 10\({}^{-3}\)) & 95.39 (12.01) & 15.44 (8.74) \\ Means for biochar rates & & & & & & & \\
20 Mg ha\({}^{-1}\) & & & 38.60 (2.00) & 0.076 (7 \(\times\) 10\({}^{-3}\)) & 24.41 (14.91) & 62.32 (11.62) \\
40 Mg ha\({}^{-1}\) & & & 37.45 (3.66) & 0.104 (6 \(\times\) 10\({}^{-3}\)) & 35.59 (23.76) & 81.57 (16.40) \\ Means for biochar particle sizes & & & & & & & \\ \(\textless{}125\)\(\mu\)m & & 35.59 (2.19) & 0.092 (1.5 \(\times\) 10\({}^{-2}\)) & 11.27 (1.88) & 78.38 (13.60) \\
125 \(\mu\)m-2 mm & 40.47 (0.87) & 0.088 (1.6 \(\times\) 10\({}^{-2}\)) & 48.74 (11.42) & 65.50 (18.08) \\ Means for biochar pyrolysis temperatures & & & & & & \\  & 300 \({}^{\circ}\)C & 37.49 (3.53) & 0.087 (1.3 \(\times\) 10\({}^{-2}\)) & 30.99 (20.84) & 69.13 (15.83) \\  & 520 \({}^{\circ}\)C & 38.56 (2.24) & 0.093 (1.6 \(\times\) 10\({}^{-2}\)) & 29.01 (20.35) & 74.75 (18.21) \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Effects of pyrolysis temperature (PT), biochar particle size, and biochar application rate (rate) on hydrophissical parameters (porosity, \(P\); available water content for plants, AWC; saturated hydraulic conductivity, \(K_{S}\); contact angle, CA) of sandy soil. Values are averages over the replicates of the treatments (\(r\)), and standard deviations are given between parentheses. Differences between control means and treatment means were evaluated by \(t\)-test. Asterisks indicate significant differences between treatedFigure 1: Measured values of the porosity \(P\) for all experiment treatments. The whiskers extend to a distance of 1.5 times the interquartile range from the edges of the box and points represent individual measurements. Box plots denoted with different letters significantly differ (HSD test) on a significance level \(p<0.05\). Figure 2: Measured values of the available water content for plants (AWC) for all experiment treatments. The whiskers extend to a distance of 1.5 times the interquartile range from the edges of the box, and points represent individual measurements.