# Lawn Bonitation Value as a Function of Glycine-Complexed Iron Formulation Application
## 3 Results
In the case of spring, the value of the leaf greenness index ranged between 24.2 and 25.9, and in autumn and fall, it ranged from 26.4 to 28.4 (mean values). It is worth noting, however, that there were no statistically significant changes between these results. The summer SPAD values ranged from 15.0 to 16.2. Fertilization variant III showed a statistically significant difference compared to the control sample. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Fe Dose**} & \multirow{2}{*}{**Year**} & \multicolumn{3}{c}{**Overall Aspect**} & \multicolumn{3}{c}{**Compactness**} \\ \cline{3-8}  & & **Spring** & **Summer** & **Autumn** & **Spring** & **Summer** & **Autumn** \\ \hline \multirow{4}{*}{Control} & 2020 & 6.27 \(\pm\) 0.06 & 5.27 \(\pm\) 0.06 & 7.37 \(\pm\) 0.06 & 7.03 \(\pm\) 0.06 & 7.37 \(\pm\) 0.06 & 7.37 \(\pm\) 0.06 \\ \cline{2-8}  & 2021 & 6.47 \(\pm\) 0.25 & 5.43 \(\pm\) 0.21 & 7.63 \(\pm\) 0.31 & 7.27 \(\pm\) 0.25 & 7.67 \(\pm\) 0.35 & 7.67 \(\pm\) 0.35 \\ \cline{2-8}  & 2020–2021 & 6.37 b \(\pm\) 0.20 & 5.35 a \(\pm\) 0.16 & 7.50 a \(\pm\) 0.24 & 7.15 b \(\pm\) 0.21 & 7.52 a \(\pm\) 0.28 & 7.52 a \(\pm\) 0.28 \\ \hline \multirow{4}{*}{\begin{tabular}{c} Variant I: \\ 60 g \\ \end{tabular} } & 2020 & 7.60 \(\pm\) 0.10 & 5.40 \(\pm\) 0.10 & 7.60 \(\pm\) 0.10 & 7.50 \(\pm\) 0.10 & 7.60 \(\pm\) 0.10 & 7.80 \(\pm\) 0.10 \\ \cline{2-8}  & 2021 & 7.80 \(\pm\) 0.30 & 5.63 \(\pm\) 0.21 & 7.87 \(\pm\) 0.32 & 7.73 \(\pm\) 0.31 & 7.83 \(\pm\) 0.31 & 8.03 \(\pm\) 0.31 \\ \cline{2-8}  & 2020–2021 & 7.70 c \(\pm\) 0.23 & 5.52 a \(\pm\) 0.19 & 7.73 a \(\pm\) 0.26 & 7.62 c \(\pm\) 0.24 & 7.72 ab \(\pm\) 0.24 & 7.92 ab \(\pm\) 0.24 \\ \hline \multirow{4}{*}{\
\begin{tabular}{c} Variant II: \\ 100 g \\ \end{tabular} } & 2020 & 8.17 \(\pm\) 0.06 & 6.60 \(\pm\) 0.10 & 8.20 \(\pm\) 0.10 & 7.93 \(\pm\) 0.12 & 7.97 \(\pm\) 0.15 & 8.17 \(\pm\) 0.12 \\ \cline{2-8}  & 2021 & 8.47 \(\pm\) 0.35 & 6.83 \(\pm\) 0.21 & 8.47 \(\pm\) 0.35 & 8.13 \(\pm\) 0.31 & 8.27 \(\pm\) 0.25 & 8.47 \(\pm\) 0.35 \\ \cline{2-8}  & 2020–2021 & 8.32 a \(\pm\) 0.28 & 6.72 b \(\pm\) 0.19 & 8.33 b \(\pm\) 0.27 & 8.03 a \(\pm\) 0.23 & 8.11 bc \(\pm\) 0.25 & 8.32 b \(\pm\) 0.29 \\ \hline \multirow{4}{*}{
\begin{tabular}{c} Variant III: \\ 140 g \\ \end{tabular} } & 2020 & 8.50 \(\pm\) 0.10 & 8.10 \(\pm\) 0.10 & 8.70 \(\pm\) 0.26 & 8.20 \(\pm\) 0.10 & 8.37 \(\pm\) 0.15 & 8.67 \(\pm\) 0.15 \\ \cline{2-8}  & 2021 & 8.73 \(\pm\) 0.31 & 8.37 \(\pm\) 0.35 & 8.83 \(\pm\) 0.29 & 8.47 \(\pm\) 0.35 & 8.70 \(\pm\) 0.36 & 8.87 \(\pm\) 0.23 \\ \cline{2-8}  & 2020–2021 & 8.62 a \(\pm\) 0.24 & 8.23 c \(\pm\) 0.27 & 8.76 c \(\pm\) 0.26 & 8.33 a \(\pm\) 0.27 & 8.53 c \(\pm\) 0.31 & 8.77 c \(\pm\) 0.21 \\ \hline \multicolumn{8}{c}{Standard Deviation} & 0.91 & 1.12 & 0.57 & 0.51 & 0.47 & 0.53 \\ \hline \multicolumn{8}{c}{Variation Coefficient, \%} & 11.8 & 18.5 & 6.97 & 6.51 & 5.91 & 6.52 \\ \hline \hline \end{tabular}  
* The same markings (a–c) mean no statistically significant changes (\(p\geq 0.05\)).  
\end{table} 
Table 2: Scores for main lawn properties depending on fertilization variant. Table 5 shows the effect of Fe fertilization on the macroelement content in plants. The results are given on a dry matter basis. In the case of most elements, a difference in the content of macroelements in plants was observed along with an increase in the dose of fertilizer (except for Mg and Ca, where, for variant III, the values were slightly lower than for variant II). Only in the case of P, the content of which was in the range of 1.22 g\(\cdot\)kg\({}^{-1}\) (d.m. )-1.35 g\(\cdot\)kg\({}^{-1}\) (d.m. ), were statistically significant changes between the variants observed. In the case of the remaining elements, no statistically significant changes occurred despite a difference in the ratings. The K content in the