Judul: Varieties of Peanut (Arachis hypogaea L.) Response on Weeding Frequency
Abstrak: The presence of weeds in peanut cultivation can suppress the growth, development, and productivity of peanut plants. The use of varieties and weeding is one of the efforts to suppress weed growth in the peanut area. This study aimed to study the response of several peanut varieties to the frequency of weeding weeds to compare the growth and yield of peanut plants. This research design used a factorial completely randomized block design (RKLT) consisting of two factors, namely peanut varieties (Hypoma 1, Talam 1, and Tasia 2) and weeding frequency (without weeding, 1x weeding, and 2x weeding). The results showed that the variety had no effect on the total dry weight of weeds, number of leaves, number of empty pods, plant fresh weight, and productivity. Weeding frequency treatment significantly affected weed dry weight, plant height, number of leaves, fresh and dry weight of peanuts, number of pods, dry weight of pods, and productivity. The 2x weeding treatment gave significantly different growth and productivity results from other weeding frequencies with the highest average productivity of 2.4 tons ha-1. The interaction of the two factors on the yield of peanuts had a significant effect on the total number of pods and the number of filled pods. The higher weed competition in peanut plants can suppress the growth and productivity of peanut plants
Keyword: Competion, Productivity, Rottboellia exaltata, Weeds

Judul: Response of Peanut Yield (Arachis hypogaea L.) Pelanduk Variety on Treatment of Type and Time Pruning
Abstrak: Kacang tanah (Arachis hypogaea L.) merupakan tanaman legum yang banyak dibudidayakan di Indonesia dan memiliki peran strategis pangan Nasional sebagai sumber protein dan minyak nabati. Peningkatan produktivitas kacang tanah banyak dilakukan dengan berbagai teknik budidaya yang relevan, yang ditujukan untuk meningkatkan produksi hasil panen. Penelitian ini bertujuan melihat respon dan pengaruh dari beberapa jenis pangkas dan waktu pangkas dalam meningkatkan produksi hasil kacang tanah. Penelitian dilaksanakan di KP Leuwikopo IPB Dramaga, Bogor pada bulan November 2020 sampai Februari 2021. Percobaan menggunakan rancangan petak terbagi (split-plot) dengan perlakuan terdiri dari dua faktor, yaitu jenis pangkas sebagai petak utama dan waktu pangkas sebagai anak petak. Hasil penelitian menunjukan bahwa perlakuan jenis pangkas dapat menurunkan rata-rata jumlah bunga yang tumbuh pada fase generatif tanaman. Waktu pangkas dapat meningkatkan daya hasil pada produktivitas tanaman, bobot polong kering per petak dan bobot 100 biji. Hal tersebut ditujukan dengan peningkatan produktivitas sebesar 2,12 ton ha-1 polong kering, 509,51 g bobot polong kering per petak dan 51,03 g 100 biji. Pemangkasan batang utama pada waktu 8 MST rata-rata dapat meningkatkan produksi hasil tanaman dimana efektivitas hasil fotosintat yang diterima oleh tanaman dapat berfokus dalam pengisian polong dan biji tanaman sehingga komponen hasil tanaman dapat meningkat secara signifikan., Peanut (Arachis hypogaea L.) is a legume that is widely cultivated in Indonesia and has a strategic role in national food as a source of protein and vegetable oil. Increasing the productivity of peanuts is mostly done by various relevant cultivation techniques, which are aimed at increasing crop yields. This study aims to examine the response and influence of several types of pruning and pruning time in increasing peanut yields. The study was carried out at KP Leuwikopo IPB Dramaga, Bogor from November 2020 to February 2021. The experiment used a split-plot design with a treatment consisting of two factors, namely the type of pruning as the main plot and the time of pruning as a subplot. The results showed that the type of pruning treatment can reduce the average number of flowers that grow in the generative phase of the plant. Pruning time can increase yield on plant productivity, dry pod weight per plot and weight of 100 seeds. This was indicated by an increase in productivity of 2.12 tons ha-1 dry pods, 509.51 g dry pod weight per plot and 51.03 g 100 seeds. Pruning the main stem at 8 WAP on average can increase crop yields where the effectiveness of photosynthate yields received by plants can focus on filling the pods and seeds of plants so that the yield component of the plant can increase significantly.
Keyword: Arachis hypogaea, Batang utama, Pemangkasan, Produktivitas, Respon

Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4