KEANEKARAGAMAN MAKROZOOBENTOS DI SUNGAI BAH BOLON KABUPATEN SIMALUNGUN SUMATERA UTARA

Simalungun City has a very wide river ecosystem. This ecosystem is surrounded by a variety of industries and is likely to dump its waste into rivers. This can have an impact on the diversity of living things in the waters. This study aims to determine the diversity of macrozoobenthos as an indicator of water quality. The purposive random sampling method was used to determine 4 sampling stations. Samples were taken 3 times with an interval of 2 weeks. Data were then analyzed using a diversity index. The results found that the phylum Annelids, Arthropods, and Mollusks are divided into 20 genera. Cyrnellus genus has the highest density value at the cigarette factory waste disposal site that is 87.40 ind / m2. The highest diversity index is found in ice plant waste disposal sites and the highest uniformity index is found in locations free of human activity. Physical chemical factors have a strong correlation with macrozoobenthos diversity

Pelatihan Berpikir Desain dan Teknologi Digital dalam Implementasi Merdeka Belajar di SDN 105300 Deli Tua Sumatera Utara

This community service aims to increase SD Negeri 105300 Deli Tua teachers' knowledge and skills in designing varied, interesting, differentiated learning processes and following the demands of the times through the application of design thinking and skills in digital technology. The method of implementing this service used ongoing training and assistance in making learning media with digital technology. The evaluation instrument used was a questionnaire, and it was analyzed descriptively. The results of this service showed that the teacher's knowledge and ability to design meaningful learning using digitalization technology according to the class phase increased significantly. Teachers had a growth mindset so that they became lifelong learning individuals and were adaptive in organizing digital-based learning and projects in their respective classes. On the other hand, the impact of this activity was felt by the participants as an increase in their sense of empathy for students

PENGARUH PEMBERIAN ZAT PENGATUR TUMBUH ALAMI TERHADAP PERTUMBUHAN STEK STEVIA (Stevia rebaudiana B.)

This study aims to determine the effect of the concentration of coconut water and onion extract on the growth of stevia plant cuttings. The research was conducted in Juli until November 2019 in trial garden of the Politeknik Wilmar Bisnis Indonesia. This research uses factorial randomized block design. The first factors are concentration of coconut water consisting of five levels is AK0 = control, AK1 = coconut water 25%, AK2 = coconut water 50%, AK3 = coconut water 75% and AK4 = coconut water 100%. The second factor was the treatment of onion extract consisting of five treatments namely BM0 = control, BM1 = concentration of onion extract 25%, BM2 = concentration of onion extract 50%, BM3 = concentration of onion extract 75% and BM4 = concentration of onion extract 100%. Observation of the percentage of live cuttings, stem height, number of leaves and root length was done at 2 MST, 3 MST and 4 MST. The highest percentage of cuttings found in plants treated with 100% coconut water and onion extract, the highest plant height was found in the treatment of 100% concentration of coconut water and onion extract (3 MST and 4 MST), the highest number of leaves found in the treatment 100% concentration of coconut water and shallot extract (3 MST) and the highest root length was found in the treatment of 100% concentration of coconut water and shallot extract (2 MST, 3 MST and 4 MST)

PREFERENSI KONSUMEN LAYANAN SAYUR ONLINE UNTUK MENINGKATKAN PENJUALAN KONSUMEN RUMAHAN DAY DAY FRESH

Day Day Fresh (DDF) is an online vegetable and fruit supply company that serves business consumers (B2B) and household consumers (B2C). Their sales growth to business consumers (B2B) has increased, but sales to household consumers (B2C) are still small and stagnant due to the difficulty of entering the home market segment. Therefore, it is important to know the preferences of online vegetable service consumers to increase sales of Day Day Fresh home consumers. Data collection uses a questionnaire and is given online via WhatsApp, Instagram, Facebook and Telegram. This research used non-probability sampling techniques with 300 respondents. Data analysis uses descriptive analysis methods using Microsoft Excel. Based on the research result, it can be concluded Product variety is a very important factor for vegetable consumers in making purchases, where the freshness aspect is the most important in product quality. Price information is also a very important factor for consumers in purchasing decisions. The promotional aspect that most influences consumer purchasing decisions is ease of ordering and complaint service. In the location aspect, WhatsApp is the most preferred medium for consumers to purchase vegetables online. Key words:  costumer preference, place, price, product, promotionINTISARIDay Day Fresh (DDF) adalah perusahaan penyediaan sayur dan buah online yang melayani konsumen bisnis (B2B) dan konsumen rumah tangga (B2C). Pertumbuhan penjualan Day Day Fresh pada konsumen bisnis (B2B) mengalami peningkatan, namun penjualan pada konsumen rumah tangga (B2C) masih sedikit dan stagnan karena sulitnya memasuki segmen pasar rumahan. Sehingga penting untuk diketahui preferensi konsumen layanan sayur online untuk meningkatkan penjualan konsumen rumahan Day Day Fresh agar produk yang dihasilkan sesuai dengan keinginan konsumen.  Penelitian dilakukan di Kota Medan pada Agustus hingga Oktober 2022. Jenis penelitian adalah marketing research. Pengumpulan data menggunakan kuesioner dan diberikan secara online dengan bantuan aplikasi whatsapp, instagram, facebook dan telegram. Penelitian ini menggunakan teknik non probability sampling dengan responden sebanyak 300 orang. Analisis data dilakukan dengan metode analisis deskriptif menggunakan Microsoft Excel.  Hasil penelitian menunjukkan bahwa variasi produk merupakan faktor yang sangat penting bagi konsumen sayuran dalam melakukan pembelian, dimana aspek kesegaran paling penting dalam kualitas produk. Informasi harga juga menjadi faktor yang sangat penting bagi konsumen dalam memutuskan pembelian. Aspek promosi yang paling mempengaruhi keputusan pembelian bagi konsumen adalah kemudahan dalam pemesanan dan layanan komplain. Pada aspek tempat, whatsapp menjadi media yang paling disukai konsumen untuk melakukan pembelian sayur online. Key words: harga, preferensi konsumen, produk, promosi, tempa

ISOLASI BAKTERI PENGHASIL ASAM INDOL ASETAT (AIA) DAN PENGARUHNYA TERHADAP VIABILITAS BENIH CABAI MERAH

Plant growth-promoting rhizobacteria are names that contribute directly or indirectly to plant growth. This group of bacteria will stimulate plant growth through the synthesis of phytohormones (bio-stimulant). Indole acetic acid (IAA) plant endogenous auxin is one of the phytohormone type that these bacteria can generate. IAA has functions for root elongation, cell division and plant growth and development differentiation. This research aims to obtain possible isolates that can generate IAA to optimize the viability of germinating red pepper seed. Bacteria have been isolated by serial dilution spread of Nutrient agar medium was incubation over a 24-hour period at 28oC (room temperature). The amount of IAA was measured by spectrophotometric analysis, selected isolate on the basis of the results, used to encourage the germination of red pepper seed. Ten out of sixteen bacterial isolates could produce IAA in the range of 7.96 ppm - 47.23 ppm. The RC 3 isolate produced the highest IAA while the RC 12 was the other way round. The isolate chosen using this experiment showed an increase in the viability of red pepper seed compare seed germination to 33%, growth spontaneity 37%, vigor index 10%, growth rates 6% and max. growth 13%. IAA isolates could therefore increase the viability of red pepper and got potential of a biofertilizer component