ABSTRAKPengeringan gabah dapat dilakukan menggunakan alat pengering energi surya, energi biomassa dan energi kombinasi surya dan biomassa. Penelitian ini bertujuan untuk menguji kinerja alat pengering gabah hybrid energi surya dan biomassa jerami padi dan sabut kelapa. Metode yang digunakan dalam penelitian ini adalah metode eksperimental dan deskriptif. Hasil penelitian menunjukkan bahwa pengeringan gabah dengan energi surya menghasilkan suhu ruang pengering rata-rata 40,42 °C, kelembaban relatif ruang pengering rata-rata 41,45%, waktu pengeringan 7 jam, kadar air akhir rata-rata 14,88% bb, laju pengeringan rata-rata 0,64% bk/jam, dan energi pengering 32.595,32 kJ. Pengeringan gabah dengan energi biomassa menghasilkan suhu ruang pengering rata-rata 33,8 °C, kelembaban relatif ruang pengering rata-rata 57%, waktu pengeringan 7 jam, kadar air akhir rata-rata 15,57% bb, laju pengeringan rata-rata 0,50% bk/jam, dan energi pengering 160.662,15 kJ. Pengeringan gabah dengan energi kombinasi surya dan biomassa menghasilkan suhu ruang pengering rata-rata 39,98 °C, kelembaban relatif ruang pengering rata-rata 45,85%, waktu pengeringan 7 jam, kadar air akhir rata-rata 15,33%, laju pengeringan rata-rata 0,55% bk/jam, dan energi pengering 136.457,76 kJ. Kinerja yang diperoleh alat pengering terbaik menggunakan energi surya dengan kadar air akhir sebesar 14,88% bb, laju pengeringan 0,64% bk/jam dan kebutuhan energi pengeringan 32.595,32 kJ. Kata Kunci: Energi biomassa; pengering hybrid; gabah; energi kombinasi; energi surya ABSTRACT Paddy drying was performed using a hybrid drier utilizing solar energy, biomass and combined solar-biomass energy as energy sources. This research objective was to evaluate performance of the hybrid paddy drier using solar energy and paddy straw and coconut coir biomass. The experimental and descriptive method was used. The result showed that the drier with solar system was capable to generate temperature of drying chamber to 40.42 °C in average, while the average relative humidity was 41.45%. The paddys final moisture was 14.88% w.b after 7 hours of drying with drying rate of 0.64 %d.b/h and energy consumption of 32,595.32 kJ. Paddy drying with biomass energy system was capable to obtain drying chambers temperature of 33.8 °C in average, the average relative humidity of 57%, the final moisture of 15.57%, the drying rate of 0.50% d.b/h and energy consumption of 160,662.15 kJ with the same drying times. The solar-biomass drying system was capable to achieve temperature of 39.98 °C, the average relative humidity of 45.85%, the final moisture of 15.33% w.b with drying rate of 0.55% d.b/h and energy consumption of 136,457.76 kJ. Therefore, the best performance for drying paddys was with the solar drying system.

Batu as a tourism city produces a lot of vegetables, flowers, and ornamental plants. Many cut flower waste from sorting is not suitable for sale. Meanwhile, SMK Negeri 2 Batu has developed several products to be marketed and is a place for students to study entrepreneurship. However, there are problems in getting market demand due to intense competition. Therefore, production requires continuous innovation and creativity. This new method is offered to increase grades by teaching them the skills of a modern dry herbarium using waste flowers from the surrounding environment. The purpose of this activity is that the teachers and students of SMK Negeri 2 Batu have the knowledge and skills to create a modern dry herbarium with Oshibana techniques. Teaching is done by giving lectures, demonstrations, practices, and evaluations. The results show increased knowledge to utilize flower and leaf waste through manufacturing activities of modern dried herbarium with the Oshibana technique. The program also provides counseling on how to use wasted flowers and leaves that can be done properly. The training to make a modern dry herbarium which was later named "Beautiful Herbarium" was able to improve the knowledge and skills of participants. The "Beautiful Herbarium" extra-curriculum was held to ensure the sustainability of the program.

Ground coffee is coffee beans that have been roasted, ground or ground so that they have a smooth shape. The purpose of this study was to determine the content of compounds in robusta coffee roasted seed extract (Coffea canephora) from plants produced by organic and inorganic fertilization, and to know the difference in compounds between the results of organic and inorganic fertilization. The characteristics of phytochemical screening were carried out qualitatively on alkaloids, flavonoids, tannins, terpenoids and saponins and the antioxidant activity was carried out by the DPPH (1,1-dipenyl-2-picrihidrazil) method. Phytochemical screening characteristic test results show that robusta coffee bean extract extract from the results of organic and inorganic fertilization both contain flavonoids, alkaloids, tannins, and saponins, while the antioxidant test activity of robusta coffee beans extracts shows differences based on the results of statistical tests of linear regression analysis with the IC50 value the highest antioxidant content was inorganic coffee roasted bean extract only 14.0629 ppm compared to the organic roasted extract with a value of 30.6159 ppmKeywords: Robusta Coffee (Coffea canophora), Phytochemical Screening, DPPH MethodABSTRAKKopi bubuk adalah biji kopi yang telah disangrai digiling atau ditumbuk sehingga mempunyai bentuk halus. Tujuan dari penelitian ini adalah untuk mengetahui kandungan senyawa dalam ekstrak biji sangrai kopi robusta (Coffe canephora) dari tanaman hasil pemupukan organik dan anorganik, dan mengetahui perbedaan senyawa antara hasil pemupukan organik dan anorganik. Karakteristik skrining fitokimia dilakukan secara kualitatif yang dilakukan terhadap alkaloid, flavonoid, tanin, terpenoid dan saponin dan aktivitas antioksidan dilakukan dengan metode DPPH (1,1-difenil-2-pikrihidrazil). Hasil uji karakteristik skrining fitokimia menunjukkan bahwa ekstrak biji sangrai kopi robusta dari hasil pemupukan oganik dan anorganik keduanya sama mengandung senyawa flavonoid, alkaloid, tanin, dan saponin,  sedangkan pada aktifitas uji antioksidan ekstrak biji sangrai kopi robusta menunjukan perbedaan berdasarkan hasil uji statistik analisis regresi linear dengan nilai IC50 kadar antioksidan paling tinggi adalah ekstrak biji sangrai kopi anorganik hanya 14,0629 ppm dibandingkan dengan ekstrak sangrai dari organik dengan nilai 30,6159 ppm.Kata kunci : Kopi Robusta (Coffea canophera), Skrining Fitokimia, Metode DPPH

Zona riparian memberikan jasa layanan ekosistem dalam mengendalikan pencemaran. Peran vegetasi riparian berperan dalam proses regulasi nutrisi. Kualitas habitat riparian sangat bergantung pada gangguan yang terjadi pada zona riparian. Untuk menentukan kemampuan jasa layanan ekosistem hulu Sungai Brantas berdasarkan kualitas air sungai dan tingkat gangguan habitat. Penentuan kualitas air meliputi pengukuran parameter suhu air, derajat keasaman air (pH), konduktivitas air, oksigen terlarut, debit air, dan kecepatan arus air pada 3 stasiun dengan 3 kali ulangan pada hulu Sungai Brantas. Hasil penentuan kualitas air dianalisis menggunakan indeks Prati. Penentuan tingkat gangguan habitat dianalisis menggunakan indeks naturalness dan indeks hemeroby. Hasil penentuan kualitas air stasiun kedua hulu sungai masuk dalam kategori sangat baik dibandingkan stasiun pertama dan ketiga. Hasil penentuan tingkat gangguan habitat berdasarkan indeks naturalness, stasiun hulu sungai kedua masuk dalam kategori alami karena masih terdapat vegetasi lokal dan keberadaan bangunan tidak dominan serta pencemaran sedikit. Berdasarkan derajat Hemeroby, stasiun hulu sungai pertama dan ketiga masuk dalam kategori euhemerobic yang mana jauh dari kondisi alami, dan stasiun kedua berada ada kondisi mesohemerobic yang merupakan kondisi yang semi alami. Dengan demikian, kualitas stasiun hulu sungai kedua lebih baik dibandingkan dengan stasiun hulu sungai pertama dan kedua. Kata kunci: gangguan habitat, jasa layanan ekositem, kualitas air, zona riparian ABSTRACT Riparian zones provide ecosystem services in controlling pollution. The role of riparian vegetation plays a role in the process of nutrition regulation. The quality of riparian habitat is very dependent on the disturbance that occurs in the riparian zone. To determine the ability of ecosystem services for the Brantas River upstream riparian zone, a study was conducted to determine river water quality and determine the level of habitat disturbance. The determination of water quality includes the measurement of water temperature, water acidity (pH), water conductivity, dissolved oxygen, water discharge, and water flows at three stations three times repetition at the upstream of the Brantas River. The results of determining water quality were analyzed using the Prati index. Determination of the level of habitat disturbance was analyzed using the Naturalness index and the Hemeroby index. The results of determining the water quality of the HS2 station are included in the excellent category compared to the HS1 and HS3 stations. Results Determination of the level of habitat disturbance based on the naturalness index, the HS2 station is included in the natural category because there is still local vegetation and the presence of buildings is not dominant and there is little pollution. While the Hemeroby index results, the HS1 and HS2 stations are in the euhemerobic category, and the HS2 station is mesohemerobic.

Tanaman kunyit(Curcuma) relatif mudah ditemukan dan penggunannya sudah meluas tidak hanya untuk keperluan memasak namun juga untuk kesehatan. kunyit (Curcuma) atau disebut Konyek dalam Bahasa Madura adalah tanaman yang sudah sering dimanfaatkan oleh masyarakat Desa Klabetan sebagai bahan pangan maupun obat tradisional yang sering disebut Jhemoh dalam Bahasa Madura. Secara umum minum jamu diracik dari tumbuhan telah terjadi mulai sejak turun-temurun oleh masyarakat Madura. Penelitian bertujuan untuk mengetahui persepsi masyarakat tentang pemanfaatan kunyit (Curcuma) di Desa Klabetan kecamatan Sepuluh kabupaten Bangkalan. Menggunakan metode deskriptif esploratif: studi pustaka, pengamatan di lapang, wawancara, analisis data dan dokumentasi persebaran tanaman kunyit (Curcuma) di Desa Klabetan Kecamatan Sepuluh Kabupaten Bangkalan. Hasil penelitian menunjukkan terdapat dua karakteristik kunyit yaitu kunyit (Curcuma) dengan kunyit pada pada organ sebagai bahan pangan 51% , obat obatan 46% dan ritual adat 3%. Bagian organ tanaman (Curcuma) jumlah daun 38%, rimpang 50% batang 12%. Jumlah kunyit (Curcuma) yang ditemukan sebanyak 7 titik di Dusun Bindeng dan 6 titik Dusun Bilarangan dari tiga Dusun.