Penelitian ini bertujuan untuk mengetahui pengaruh model contextual teaching and learning dan self-regulated learning terhadap kemampuan koneksi matematis siswa, ditinjau dari siswa kategori self-regulated learning (tinggi, sedang, rendah). Populasi penelitian ini adalah seluruh siswa SMK Darul Fikri Pandeglang, sampel dipilih dua kelas secara acak, yaitu kelas X RPL 1 sebagai kelas eksperimen, dan kelas X TSM 1 sebagai kelas kontrol. Pengumpulan data dilakukan melaui tes dan non tes. Tes berupa 6 soal kemampuan koneksi matematis, sedangkan non tes berupa soal angket self-regulated learning. Pretest diberikan sebagai tes awal sebelum perlakuan contextual teaching and learning, sedangkan posttes dilakukan setelah diberikan perlakuan contextual teaching and learning. Hasil yang diperoleh setelah proses pembelajaran dengan contextual teaching and learning dan self regulated learning terlihat adanya pengaruh yang signifikan terhadap kemampuan koneksi matematis siswa. Dengan demikian, dapat disimpulkan bahwa pembelajaran dengan model contextual teaching and learning dan self-regulated learning berpengaruh terhadap kemampuan koneksi matematis siswa.
North Labuhanbatu regency is one of the districts in North Sumatra Province that has the potential in the development of agriculture and livestock sector. This research aims to identify internal and external factors in the development of goat and sheep farming businesses, formulate alternative development strategies, and strategic priorities that can be applied in the development of goat and sheep in North Labuhanbatu regency. The research site is in North Labuhanbatu regency in February – April 2020. The data used is primary and secondary data. The basic method used in this study is descriptive analytics. The data analysis method used matrix analysis (IFE), matrix (EFE) and matrix (SWOT). The results showed that alternative strategies that can be used in the development of goat and sheep livestock in North Labuhanbatu regency are active and professional agriculture and livestock counselling human resources, establishing livestock institutions such as livestock groups, the role of local governments in mentoring and approaching, establishing livestock health services and cooperative as well as strengthening the livestock and sheep markets in North Labuhanbatu regency.
North Labuhanbatu Regency is one of the districts in North Sumatera that has potential in the development of livestock. This research aims to find out the potential of agriculture and plantation waste as well as areas that can be used as a development area for goat and sheep livestock in North Labuhanbatu Regency. The type of research used is descriptive research to describe the potential of agriculture and plantation waste in determining the development area of goat and sheep livestock using LQ methods combined with livestock density, waste support index and capacity to increase ruminants livestock population. This research was conducted in North Labuhanbatu Regency in February–April 2020. The results showed that North Labuhanbatu Regency has development potential in supporting North Sumatra Province a producer of goat and sheep livestock. Regional strategy I namely Aek Natas Sub-District, Kualuh Hilir, Kualuh Leidong. Regional strategy group namely Na IX-X, Aek Kuo, Kualuh Selatan, Kualuh Hulu sub-districts. Group III strategy namely Marbau sub-district. Alternative strategies for utilizing agriculture and plantation waste in the development of goat and sheep livestock one of them is the integration system in order to use crop waste as a source of animal feed in North Labuhanbatu Regency.
Nitrogen (N) is one of the elements most needed by plants and widely distributed in nature. Nitrogen fixation can occur symbiotic or non-symbiotic by soil microbes. This research aimed to examine the potential of N-fixing microbes in increasing the availability of N in the soil. This research was conducted at the Soil Biology Laboratory of Faculty of Agriculture, Universitas Sumatera Utara. The results showed that the ability of microbes to increase the availability of N in the soil was varied. The population of N-fixing bacteria increased during 4 weeks of incubation. All bacterial isolates which incubated on Andisol soil were able to increase soil N-total content by around 9.4% -15.6%. The isolate with the most potential to increase soil N-total content was B6 isolate with an increase in total N content by 15.6%.
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