Abstrak. Tujuan yang ingin dicapai dalam penelitian ini adalah untuk mengetahui efektivitas layanan bimbingan kelompok dengan teknik modeling simbolik untuk meningkatkan motivasi belajar siswa kelas XI SMK MATARAM Semarang. Jenis penelitian adalah penelitian eksperimen dengan desain penelitian true eksperimen design dengan jenis One Group Pre-test and Post-test design. Peneliti menggunakan sebanyak 14 siswa untuk kelompok eksperimen. Metode pengumpulan data menggunakan skala psikologi, wawancara dan observasi. Teknik yang digunakan dalam penelitian ini adalah simple random sampling. Hasil penelitian kelompok eksperimen skor pretest rata-rata 77,78 (kategori rendah) dan kelompok kontrol sebesar 81,85. Hasil post-test menunjukkan rata-rata kelompok eksperimen sebesar 103 (kategori tinggi) dan kelompok kontrol sebesar 82,86. Sehingga terjadi peningkatan rata-rata pada kelompok eksperimen sebesar 25,22. Hasil uji hipotesis diperoleh hasil thitung =3,242. Dikonsultasikan dengan ttabel taraf signifikansi 5% (2,056). Hal tersebut menunjukkan bahwa thitung =6,101 > ttabel = 2,056. Disimpulkan bahwa Layanan Bimbingan Kelompok Dengan Tektik Modeling Simbolik Efektif Untuk Meningkatkan Motivasi Belajar Siswa Kelas XI SMK MATARAM Semarang. Kata kunci: Layanan bimbingan kelompok dengan teknik modeling simbolik, Motivasi belajar
Vetiver grass (Chrysopogon zizanioides), Poaceae is the leading commodity in Garut Regency, Indonesia, the second-largest producer in the world of vetiver oils. The content of vetiver oils is strongly influenced by the environment, for example, drought stress. Drought stress causes plants to adapt by producing secondary metabolites such as essential oils. This experiment aimed to analyze growth, phytocomponents and obtaining the best quality of vetiver grass accessions under drought stress. The results showed that root and shoot dry biomass were significantly affected by the interaction between drought stress duration and vetiver grass accession. The root dry biomass of Kamojang accession decreased by 25.4%, while Cilawu increased by 5% for four days of drought stress. The root length and shoot length were not significantly affected by the treatment. The highest root/shoot length ratio was Verina, and the lowest one was Cisarua. The highest increase in proline occurred in Cilawu accession (85.7%), while the lowest was Verina (6.67%). Essential root oils contain 53 types of phytocomponents, dominated by sesquiterpenes, being khusimol, the highest type. The Cilawu is the best accession based on growth and content rendement.
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