## 3 Results
### Evaluation of Near Infrared Spectroscopy (NIRS)
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline
**PHASE** & **DOY** & **Samples** & \multicolumn{2}{c}{**PMC (\%)**} & \multicolumn{2}{c}{**CP (\%)**} & \multicolumn{2}{c}{**NDF (\%)**} \\ \cline{3-10}
**(field)** & **(year)** & **(n)** & **Mean \(\pm\) SD** & **Range** & **Mean \(\pm\) SD** & **Range** & **Mean \(\pm\) SD** & **Range** \\ \hline CALIB. & (2018) & & & & & & & & \\ MIT\_1 & 39 & 24 & \(77.5\pm 7.8\) & \(55.6\)–\(86.1\) & \(18.7\pm 4.9\) & \(8.7\)–\(25.3\) & \(34.3\pm 11.9\) & \(18.6\)–\(58.9\) \\  & 66 & 24 & \(82.2\pm 5.2\) & \(66.7\)–\(88.9\) & \(18.3\pm 4.7\) & \(8.3\)–\(27.0\) & \(36.4\pm 10.4\) & \(17.4\)–\(52.6\) \\  & 99 & 24 & \(84.6\pm 2.4\) & \(79.6\)–\(88.6\) & \(13.2\pm 3.7\) & \(8.3\)–\(25.5\) & \(40.3\pm 7.1\) & \(31.3\)–\(52.6\) \\  & 122 & 24 & \(82.7\pm 2.8\) & \(73.3\)–\(87.1\) & \(15.2\pm 3.2\) & \(10.2\)–\(24.1\) & \(46.8\pm 7.1\) & \(33.0\)–\(60.3\) \\  & 155 & 24 & \(68.5\pm 5.7\) & \(54.2\)–\(77.8\) & \(10.5\pm 2.4\) & \(7.3\)–\(15.9\) & \(60.2\pm 3.4\) & \(51.7\)–\(66.4\) \\  & 266 & 6 & \(89.1\pm 5.0\) & \(85.9\)–\(93.9\) & \(20.5\pm 1.0\) & \(19.3\)–\(21.8\) & \(58.8\pm 3.0\) & \(53.0\)–\(61.3\) \\  & 295 & 35 & \(86.2\pm 2.7\) & \(77.8\)–\(90.8\) & \(24.3\pm 8.8\) & \(13.4\)–\(52.5\) & \(50.5\pm 7.0\) & \(28.5\)–\(64.5\) \\  & 310 & 35 & \(79.0\pm 6.0\) & \(58.5\)–\(87.8\) & \(16.8\pm 5.1\) & \(7.7\)–\(31.6\) & \(51.8\pm 10.1\) & \(28.9\)–\(71.1\) \\  & 345 & 35 & \(82.5\pm 5.6\) & \(66.7\)–\(88.7\) & \(18.4\pm 5.2\) & \(13.9\)–\(30.0\) & \(47.7\pm 8.1\) & \(34.2\)–\(62.1\) \\ MIT\_2 & 130 & 24 & \(83.7\pm 2.7\) & \(77.9\)–\(87.1\) & \(12.1\pm 1.9\) & \(8.9\)–\(15.5\) & \(51.4\pm 3.6\) & \(45.7\)–\(58.0\) \\  & 135 & 12 & \(83.9\pm 2.5\) & \(79.1\)–\(86.9\) & \(11.5\pm 1.6\) & \(9.6\)–\(14.9\) & \(50.1\pm 4.1\) & \(43.2\)–\(57.4\) \\ TAP & 130 & 24 & \(80.4\pm 3.3\) & \(72.9\)–\(83.4\) & \(10.4\pm 1.7\) & \(7.7\)–\(14.0\) & \(49.0\pm 6.7\) & \(41.1\)–\(66.1\) \\ QF & 135 & 24 & \(72.6\pm 3.7\) & \(65.8\)–\(77.8\) & \(12.8\pm 3.4\) & \(7.3\)–\(19.1\) & \(46.7\pm 7.1\) & \(35.1\)–\(58.3\) \\ \hline VALID. & (2019) & & & & & & \\ CUB & 10 & 12 & \(82.2\pm 2.8\) & \(77.8\)–\(86.5\) & \(20.9\pm 4.7\) & \(15.3\)–\(28.3\) & \(29.4\pm 5.4\) & \(17.7\)–\(37.4\) \\ AZI & 25 & 12 & \(71.0\pm 6.5\) & \(55.3\)–\(79.6\) & \(13.0\pm 2.2\) & \(10.0\)–\(18.9\) & \(53.1\pm 5.2\) & \(45.8\)–\(65.8\) \\ GRO & 25 & 12 & \(62.5\pm 6.2\) & \(50.0\)–\(70.2\) & \(11.9\pm 1.1\) & \(10.1\)–\(13.3\) & \(59.9\pm 3.0\) & \(55.7\)–\(64.2\) \\ MUR & 45 & 15 & \(79.7\pm 3.1\) & \(72.9\)–\(85.3\) & \(11.9\pm 2.3\) & \(8.8\)–\(17.5\) & \(44.3\pm 4.3\) & \(37.6\)–\(53.0\) \\ MIT\_2 & 45 & 8 & \(82.4\pm 2.6\) & \(80.2\)–\(86.8\) & \(17.0\pm 3.8\) & \(12.9\)–\(24.6\) & \(39.6\pm 5.6\) & \(30.7\)–\(44.9\) \\ PAD & 55 & 8 & \(72.8\pm 4.6\) & \(63.9\)–\(80.0\) & \(13.9\pm 5.5\) & \(8.4\)–\(22.4\) & \(52.1\pm 8.8\) & \(35.6\)–\(60.4\) \\ TAP & 50 & 8 & \(75.7\pm 4.9\) & \(68.3\)–\(81.7\) & \(10.7\pm 2.0\) & \(7.1\)–\(13.5\) & \(52.2\pm 5.1\) & \(41.5\)–\(59.0\) \\ QF & 50 & 8 & \(72.8\pm 8.8\) & \(57.9\)–\(83.3\) & \(12.4\pm 3.0\) & \(9.1\)–\(16.5\) & \(48.2\pm 12.6\) & \(32.4\)–\(67.3\) \\ \hline CALIB.–calibration phase; VALID.—validation phase; DOY—day of the year; SD—standard deviation; PMC—pasture moisture content; CP—crude protein; and NDEF—neutral detergent fiber. & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Pasture moisture content (PMC), crude protein (CP), and fiber (NDF) reference values of calibration phase and external validation phase.