This research aims to investigate the effects of phosphate and lime fertilizer on the growth and production of soybean plants in a former wetland. It was carried at the Experimental Field of the Agriculture Faculty, Samudra University Langsa, at a height of 3 meters above sea level (MASL) and a soil pH of 5.5. The results showed that phosphate fertilizer had a significant effect on plant height at the age of 30 DAP, the number of pods per polybag, the number of filled pods, the weight of dry seeds per polybag, and the weight of 100 dry seeds; however, it had no significant effect on plant height at the age 10 and 20 DAP, as well as on the number of productive branches. The most effective type of phosphate fertilizer found in this research was P3 (TSP). The most effective type of lime fertilizer found in this study was K2 (Dolomite). The combination of phosphate and lime fertilizer found to have a significant effect on the number of pods per polybag and the number of filled pods. The best combination of phosphate and lime fertilizer was P3K2 (TSP + Dolomite) giving the best results.

Tujuan penelitian untuk menentukan pertumbuhan cacing tanah (Lumbricus terrestris) dengan media buatan. Penelitian dilakukan di Laboratorium Pendidikan Biologi Universitas Palangka Raya pada Juni - Juli 2018 menggunakan desain rancangan acak lengkap dengan 3 macam perlakuan dan 6 ulangan. Bahan yang digunakan cacing tanah (72 cacing) dengan rata–rata berat 2 gr dan panjang tubuh 15 cm. Bahan organik sebagai media hidup yaitu tanah tanpa campuran pupuk kendang (P0/kontrol), Tanah 2 Kg + kotoran sapi 2 Kg (P1), Tanah 2 Kg + Kotoran kambing 2 Kg (P2), Tanah 2 Kg + Kotoran ayam 2 Kg (P3). Parameter yang diukur adalah panjang dan biomassa cacing tanah selama 7 hari setelah cacing dimasukan ke dalam media (pada awal dan akhir penelitian). Parameter pendukung yang diukur adalah pH tanah, suhu tanah dan kelembaban. Data dianalisis menggunakan analisis varians diikuti oleh uji Beda Nyata Terkecil pada level 5%. Hasil penelitian menunjukkan perbedaan media tidak memiliki pengaruh terhadap parameter panjang tubuh cacing tanah, sedangkan beberapa media berpengaruh terhadap berat tubuh cacing tanah. Media yang memiliki pengaruh yang paling besar terhadap berat tubuh cacing tanah adalah kotoran ayam.

The development of electronic learning materials is very necessary in the midst of the COVID-19 pandemic which requires lecture activities to be carried out online. This was carried out to support physical distancing in an effort to break the chain of transmission of COVID-19. Currently, there are not many electronic learning materials available that lead to student centered learning (SCL) and can be implemented in the midst of the COVID-19 pandemic. The purpose of this research is to develop an eLEMA (Electronic Learning Material) application, an Android-based electronic learning material with content or material that can be accessed online and offline, and with features that make it easier for users to operate. This research is a research development (Research and Development; R & D) to develop Android-based ELEMA-SCL PROTOZOA (Electronic Learning Material-Student Centered Learning) for Zoology courses. This development model consists of 3 phases of approach, namely: (1) Phase 1: Needs Assessment; (2) Phase 2: Design; and (3) Phase 3: Develop / Implement. The product developed in the form of an Android-based eLEMA application made using the MIT App Inventor is feasible to implement. The implementation results show: (1) the effectiveness of online and offline lectures with a gain value of 0.52 in the Medium category; (2) student response to the implementation of eLEMA is positive. Thus the eLEMA application can be used for online and offline lectures during the COVID-19 pandemic.

Vertebrate and animal development subjects are covered in Zoology courses in the University of Palangka Raya which is learned in third and fourth semester. These subjects differ in content. Vertebrate course covers animal structure, while animal development course is more about the process of development. Today"s learning demands is to develop a critical thinking and build social interaction among students. Collaborative learning incorporating digital media through Lesson Study (LS) was implemented to improve learning outcomes in both subjects. Collaborative learning demands students to be self-minded, cooperative, and able to reveal thoughts mutually to their classmates to be employed for the above-mentioned purpose. The implementation of collaborative learning through LS was done with four cycles of "Plan, Do, and See" in Vertebrate and Animal Development subjects. These aimed to enhance student"s activities and critical thinking capabilities. The studied result showed improvement of activities in problem analysis stage, discussion and delivery of discussion results for zoology courses according to implementation of collaborative learning through LS cycles. Critical thinking capability of students was detected better in both subjects, mainly in the capability of conclusion drawing and presenting discussion results from assignments which were conducted by the aid of digital media. Collaborative learning incorporating digital media through LS could enhance activities and critical thinking capabilities of students.

Penelitian ini bertujuan mengembangkan bahan ajar digital PBL guna mendukung dan memudahkan mahasiswa dalam pemahaman konsep. Penelitian ini merupakan penelitian pengembangan (RD) dengan model ADDIE, terdiri dari 5 tahap yakni: (1) Analisis , (2) Desain , (3) Pengembangan , (4) Implementasi , (5) Evaluasi . Hasil penelitian berupa buku PBL digital untuk meningkatkan keterampilan berpikir kritis, memecahkan masalah, dan memahami suatu konsep pembelajaran melalui masalah yang disajikan pada awal pembelajaran, serta dapat digunakan sebagai bahan penunjang pada mata kuliah Zoologi Vertebrata.Hasil penelitian menunjukkan bahwa pengembangan bahan ajar PBL berdasarkan hasil validasi memperoleh kriteria sangat layak. Bahan ajar digital PBL dapat meningkatkan pemahaman konsep mahasiswa berdasarkan hasil uji N-Gain dengan nilai rata-rata sebesar 0,7 dengan kategori tinggi, dan respons siswa memperoleh nilai rata-rata 4,4 dengan kategori sangat baik.