## 3 Results
### Effects of Treatments on Soil Chemical Properties under Wheat Agroecosystem
\begin{table}
\begin{tabular}{c c c c c c c} \hline \multirow{2}{*}{**Parameter**} & \multirow{2}{*}{**Treatment**} & \multicolumn{5}{c}{**Soil Layer (cm)**} \\ \cline{3-8}  & & **0-10** & **10-20** & **20-40** & **40-60** & **60-100** \\ \hline \multirow{6}{*}{Water content (\%)} & CT & 7.26 \(\pm\) 0.06 Ga & 6.40 \(\pm\) 0.28 Cb & 5.24 \(\pm\) 0.24 & 4.63 \(\pm\) 0.14 Cc & 3.38 \(\pm\) 0.20 Ad \\  & CTN & 8.24 \(\pm\) 0.38 DEsa & 7.43 \(\pm\) 1.33 DEsa & 6.52 \(\pm\) 0.20 ABa & 5.50 \(\pm\) 1.38 DEsb & 3.35 \(\pm\) 0.36 Ab \\  & CTM & 8.94 \(\pm\) 0.59 DEsa & 7.93 \(\pm\) 0.64 DEsa & 7.23 \(\pm\) 1.33 ABa & 6.57 \(\pm\) 0.23 AChE & 3.39 \(\pm\) 0.25 Ab \\  & CTNM & 10.19 \(\pm\) 0.70 CDa & 8.86 \(\pm\) 0.73 DEsb & 7.33 \(\pm\) 1.34 ABab & 7.03 \(\pm\) 0.98 ABb & 3.26 \(\pm\) 0.35 Ac \\  & NT & 12.27 \(\pm\) 0.33 RCAa & 9.20 \(\pm\) 0.22 ABcb & 7.92 \(\pm\) 0.60 ABbc & 7.26 \(\pm\) 0.33 ABc & 3.25 \(\pm\) 0.53 Ad \\  & NTN & 13.17 \(\pm\) 1.39 ABa & 9.45 \(\pm\) 1.73 ABb & 8.59 \(\pm\) 1.18 ABa & 6.41 \(\pm\) 0.37 ABc & 3.32 \(\pm\) 0.22 Ac \\  & NTM & 13.87 \(\pm\) 0.90 ABa & 10.10 \(\pm\) 0.43 ABb & 8.60 \(\pm\) 1.00 ABc & 7.26 \(\pm\) 0.76 ABc & 3.35 \(\pm\) 0.35 Ad \\  & NTNM & 14.55 \(\pm\) 0.26 Ac & 11.81 \(\pm\) 0.20 Ab & 9.54 \(\pm\) 0.52 Ac & 7.93 \(\pm\) 0.32 Ad & 3.29 \(\pm\) 0.35 Ac \\ \hline \end{tabular} Different capital letters indicate significant differences between different treatments for the same soil layer (\(p<0.05\); [PERSON]’s test), and different lower-case letters indicate significant differences between different treatments and different soil depths (\(p<0.05\); [PERSON]’s test). CT: conventional tillage, CTN: conventional tillage with inorganic N fertilizer, CTM: conventional tillage with organic N fertilizer, CTNM: conventional tillage with combined application of organic and inorganic N fertilizer, NTN: no-tillage, NTN: no-tillage with inorganic N fertilizer, NTN: no-tillage with combined application of organic and inorganic N fertilizer, NTNM: no-tillage with combined application of organic and inorganic N fertilizer.  
\end{table} 
Table 3: Variation in soil water content under different tillage and fertilization approaches. content, whilst NTNM had the lowest NO3\({}^{-}\)-N content. Regarding different soil layers, the soil NO3\({}^{-}\)-N content showed an obvious trend of first significantly (\(p<0.05\)) increasing in the surface soil layers, then decreasing in the sub-surface soil layers, and being the highest at 20-40 cm. Figure 3: Effect of tillage techniques and N fertilization methods on soil quality indicators. Note: (**a**) is the concentration of SOC at different soil layers, (**b**) is the concentration of TN at different soil layers, and (**c**) is the concentration of TP at different soil layers. The error bars indicate standard deviation. Different capital letters indicate significant differences between different treatments for the same soil layer (\(p<0.05\); [PERSON]’s test), and different lower-case letters indicate significant differences between different treatments and different soil depths (\(p<0.05\); [PERSON]’s test). CT: conventional tillage, CTN: conventional tillage with inorganic N fertilizer, CTM: conventional tillage with organic N fertilizer, CTNM: conventional tillage with combined application of organic and inorganic N fertilizer, NT: no-tillage, NTN: no-tillage with inorganic N fertilizer, NTM: no-tillage with organic N fertilizer, NTM: no-tillage with combined application of organic and inorganic N fertilizer. In 0-60 cm soil layer, the NH\({}_{4}\)+-N content of NTNM treatment was significantly (\(p<0.05\)) the highest, and the lowest NH\({}_{4}\)+-N content was associated with CT, except for the 20-40 cm soil layer where the lowest NH\({}_{4}\)+-N content was noted in CTN treatment. Moreover, in the 60-100 cm soil layer, the CTM treatment had significantly (\(p<0.05\)) highest NH\({}_{4}\)+-N content whilst the lowest NH\({}_{4}\)+-N content was noted in NTM treatment.