Judul: Pengaruh Jenis Pupuk terhadap Pertumbuhan dan Hasil Empat Varietas Cabai (Capsicum annuum L.)
Abstrak: Cabai (Capsicum annuum L.) merupakan tanaman yang memiliki nilai ekonomi yang tinggi. Tingginya permintaan konsumsi cabai mendorong dilakukannya upaya budidaya untuk meningkatkan kualitas dan produktivitas cabai. Pemberian pupuk yang tepat merupakan salah satu upaya untuk menghasilkan kualitas karakter yang unggul dan produktivitas tinggi. Percobaan dilakukan di Kebun Percobaan PKHT Tajur 2 IPB pada bulan Januari hingga Juli 2021. Percobaan menggunakan rancangan perlakuan petak terbagi dalam rancangan kelompok lengkap teracak. Petak utama yaitu varietas: Harita IPB, Shiara, Genie dan Bara. Anak petak yaitu pemupukan: P1 (NPK 16:16:16 + gandasil B/D), P2 (NPK 15:15:15), P3 (AB mix). Varietas Harita IPB memiliki umur berbunga dan umur panen yang lebih cepat dibandingkan varietas lainnya. Varietas Shiara memiliki ukuran buah dan bobot buah lebih besar dari varietas lainnya. Jenis pupuk tidak berpengaruh nyata terhadap peubah yang diamati kecuali umur panen dan bobot buah. Varietas menunjukkan keragaman dalam umur berbunga, tinggi tanaman, ukuran dan bobot buah. Respon varietas terhadap jenis pupuk menunjukkan perbedaan yang nyata pada umur panen, ukuran daun dan diameter buah. Cabai varietas Bara memberikan produktivitas yang paling tinggi. Kata kunci: pemupukan, produktivitas, varietas, Chilli pepper is a plant that has high economic value. The high demand for consumption of chilli pepper encourages cultivation efforts to improve the quality and productivity of chilli pepper. Appropriate fertilizer application is one of the efforts to produce superior character quality and high productivity. This study was conducted at experimental stasion of PKHT Tajur 2 IPB from January to July 2021. Experiment was arranged in a split plot with randomized complete block design . Main plot factors was on varieties: Harita IPB, Shiara, Genie and Bara. The subfactors was on application of fertilizer: P1 (NPK 16:16:16 + gandasil B/D), P2 (NPK 15:15:15), P3 (AB mix). The Harita IPB variety has a faster flowering and harvesting age than other varieties. The Shiara variety has larger fruit size and fruit weigh than other varieties. Varieties showed diversity in flowering age, plant height, fruit size and weight. The response of varieties to the type of fertilizer showed significant differences in harvest age, leaf size, and fruit diameter. Bara variety gave the highest productivity. Keywords: fertilization, productivity, variety
Keyword: fertilization, productivity, variety

Judul: Uji Daya Hasil dan Evaluasi Keragaan Sepuluh Galur Harapan Tanaman Cabai Besar (Capsicum annuum L.) IPB
Abstrak: Cabai besar (Capsicum annuum L.) merupakan salah satu komoditas hortikultura terpenting yang banyak dibudidayakan dan dikonsumsi oleh masyarakat Indonesia. Hal ini menjadikan pemuliaan tanaman cabai perlu terus dilakukan terutama dalam menghadapi tantangan perubahan iklim dan peningkatan manusia yang pesat. Penelitian ini bertujuan mengevaluasi daya hasil dan keragaan dari sepuluh galur harapan cabai besar IPB. Penelitian dilaksanakan pada September 2022 hingga Maret 2023 di Kebun Percobaan Leuwikopo IPB dan Laboratorium Pemuliaan Tanaman, IPB Dramaga, Bogor, Jawa Barat. Penelitian ini menggunakan rancangan kelompok lengkap teracak (RKLT) faktor tunggal dengan tiga ulangan. Bahan tanam yang digunakan terdiri dari sepuluh galur harapan IPB dengan tiga varietas pembanding yaitu Arisa IPB, Anies IPB, dan Seloka IPB. Hasil penelitian menunjukkan bahwa perlakuan genotipe berpengaruh nyata terhadap seluruh karakter yang diamati kecuali diameter batang. Galur cabai besar yang diuji memiliki potensi untuk dilepas menjadi varietas unggul baru karena menunjukkan hasil yang sama atau lebih baik dari varietas pembanding. Dari kesepuluh galur yang diuji, galur F4.317375-3-1 berpotensi untuk menjadi calon varietas unggul baru karena memiliki jumlah buah total per tanaman yang banyak (70,46 buah), bobot buah total per tanaman yang tinggi (483,71 g), umur berbunga (30 HST) dan umur panen (75 HST) yang cepat, produktivitas tanaman tinggi (9,5 ton ha-1), potensi hasil tinggi (16,32 ton ha-1) yang setara atau lebih baik dari varietas pembanding., Chili pepper (Capsicum annuum L.) is one of the most important horticultural commodities cultivated and consumed by the Indonesian people. This makes the breeding of chili pepper plants an ongoing necessity, especially in the face of the challenges posed by climate change and rapid population growth. This research aims to evaluate the yield and performance of teen lines chili pepper IPB. The research was carried out from September 2022 to March 2023 at the Leuwikopo Experimental Garden of IPB and Plant Breeding Laboratory, IPB Dramaga, Bogor, West Java. This study used a Randomized Complete Block Design (RCBD) with a single factor and three replications. The plant material consisted of teen lines IPB and three comparison varieties of chili were Arisa IPB, Anies IPB, and Seloka IPB. The results of the study showed that the genotype treatment had a significant effect on all observed traits except stem diameter. The tested chili pepper lines demonstrated potential for release as new superior varieties, as they exhibited similar or better performance compared to the reference varieties. Among the teen tested lines, F4.317375-3-1 showed potential as a candidate for a new superior variety due to its high total fruit yield per plant (70.46 fruits), total fruit weight per plant (483.71 g), early flowering (30 DAS), early harvest (75 DAS), high plant productivity (9.5 tons/ha), and high yield potential (16.32 tons/ha), which were either equivalent or better than the reference varieties
Keyword: cabai besar, evaluasi, galur, karakter, varietas pembanding

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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