## 3 Results
### Multi-Row Variety 'Meridian' in 2022  
In 2022, the variety Meridian achieved high yields, significantly exceeding the target yield (10 t ha\({}^{-1}\)) (Table 5). According to the quadratic regression, the theoretical optimal yield (\(\rm{Y_{opt}}\)) was 11.6 t ha\({}^{-1}\), reached with an optimal N application (\(\rm{N_{opt}}\)) of 213 kg ha\({}^{-1}\) (Figure 3). Both the GFO (N 12) and Sensor 10 t ha\({}^{-1}\) (N 18) achieved the maximum yield, with sensor-based fertilization showing higher protein contents and N uptakes compared to GFO. The Sensor 10 t ha\({}^{-1}\) (N 18) applied 40 kg ha\({}^{-1}\) more N than GFO but remained slightly below \(\rm{N_{opt}}\). Notably, in this year, only negative N balances were observed, except for Sensor + 10% (N 22), which achieved a balanced N surplus (0 kg ha\({}^{-1}\)). NUE was very high across all treatments. Additionally, treatment N 6, characterized by a single N application at the beginning of the growing season, performed very well in 2022.  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline  & **Treatment** & **N Fertilization** & **FM Yield** & **Protein [\%]** & **N Uptake** & **N Surplus** & **NUE** \\  & & **[kg ha\({}^{-1}\)]** & **[t ha\({}^{-1}\)]** & **Protein [\%]** & **[kg ha\({}^{-1}\)]** & **[kg ha\({}^{-1}\)]** & **[\%]** \\ \hline N 1 & 0/0/0 = 0 & 0/0/0 = 0 & 3.9 j  & 10.0 k  & 54.5 n  & \(-\)54.5 s & & \\ N 2 & 40/30/0 = 70 & 40/30/0 = 70 & 7.8 j  & 9.9 k  & 106.3 m  & \(-\)36.3 f  & 74.0 c  \\ N 3 & 40/30/40 = 110 & 40/30/40 = 110 & 9.3 h  & 11.0 jk  & 141.6 l  & \(-\)31.6 f  & 79.2 abc  \\ N 4 & 40/60/40 = 140 & 40/60/40 = 140 & 10.5 defg  & 12.1 f  & 173.9 ghj  & \(-\)33.9 f  & 85.3 abc  \\ N 5 & 70/30/40 = 140 & 70/30/40 = 140 & 10.4 defg  & 11.7 ghj  & 167.6 jk  & \(-\)27.6 def [FONOTE:l]Footnote 1: footnotemark: [ENDFOOTNOTE] & 80.8 abc  \\ N 6 & 160/0/0 = 160 & 160/0/0 = 160 & 11.2 abcd  & 11.6 hij  & 178.8 f [FONOTE:l]Footnote 1: footnotemark: [ENDFOOTNOTE] & 77.7 abc  \\ N 7 & 70/90/0 = 160 & 70/90/0 = 160 & 11.1 abcde  & 12.5 defghi  & 192.1 defghi  & \(-\)32.1 f  & 86.0 ab  \\ N 8 & 40/90/40 = 170 & 40/90/40 = 170 & 10.9 becde  & 13.0 bcdefg  & 195.0 defg [FONOTE:l]Footnote 1: footnotemark: [ENDFOOTNOTE] & \(-\)25.0 cdf  & 82.6 abc  \\ N 9 & 70/60/40 = 170 & 70/60/40 = 170 & 11.2 abcd  & 12.9 cdfg [FONOTE:l]Footnote 1: footnotemark: [ENDFOOTNOTE] & \(-\)28.7 def  & 84.9 abc  \\ N 10 & 70/90/40 = 200 & 70/90/40 = 200 & 11.7 ab  & 13.5 abcde  & 218.5 abc [FONOTE:l]Footnote 1: footnotemark: [ENDFOOTNOTE] & \(-\)18.5 abcd [FONOTE:l]Footnote 1: footnotemark: [ENDFOOTNOTE] & 82.0 abc  \\ N 11 & 70/120/40 = 230 & 70/120/40 = 230 & 11.9 a  & 14.2 ab  & 233.9 a  & \(-\)3.9 ab  & 78.0 abc  \\ N 12 & GFO & 60/50/60/60 = 170 & 11.4 abc  & 13.0 bcdefg [FONOTE:l]Footnote 1: footnotemark: [ENDFOOTNOTE] & 205.2 bcd  & \(-\)35.2 f [FONOTE:f]Footnote 1: footnotemark: [ENDFOOTNOTE] & 88.7 a  \\ N 13 & GFO \(-\)10\% & 54/45/54 = 153 & 10.4 degf  & 12.5 defghi  & 180.2 fghi  & \(-\)27.2 f  & 82.2 abc  \\ N 14 & GFO \(-\)20\% & 48/40/48 = 136 & 10.2 efgh  & 11.8 ghj  & 166.2 ik  & \(-\)30.2 f  & 82.2 abc  \\ N 15 & GFO \(-\)30\% & 42/35/42 = 119 & 9.7 gh  & 11.4 f  & \(-\)34.3 f  & 83.0 abc  \\ N 16 & GFO \(+\)10\% & 66/55/66 = 187 & 11