Judul: The Effect of Providing Several Types of Foliar Fertilizer on the Growth and Productivity of Edamame
Abstrak: Edamame dikenal sebagai kultivar kedelai (Glycine max (L) Merrill) Jepang dengan ukuran biji yang besar. Wilayah Pegunungan Indonesia dari segi kondisi lingkungan cukup mendukung untuk pembudidayaan edamame. Hal tersebut tentu harus didukung dengan penentuan jenis pupuk, dosis pupuk, metode pemupukan, waktu dan frekuensi pemupukan yang efektif dan efisien. Pemupukan melalui daun dilakukan sebagai pelengkap dari pemupukan yang dilakukan melalui tanah dekat perakaran dengan tujuan pemenuhan unsur hara tanaman. Penelitian ini bertujuan membandingkan pengaruh penggunaan beberapa jenis pupuk daun terhadap pertumbuhan dan produksi edamame. Penelitian dilaksanakan di lapangan dengan Rancangan Acak Kelompok satu faktor yaitu jenis pupuk daun. Terdapat 7 perlakuan pupuk daun dengan 3 ulangan sehingga total 21 satuan percobaan. Analisis ragam memberikan hasil berbeda nyata pada parameter tinggi tanaman pada usia 21, 28, 35 dan 49 hari setelah tanam, namun tidak berbeda nyata pada parameter jumlah daun, jumlah ketiak daun, jumlah bintil akar, bobot brangkasan, jumlah polong pertanaman, produksi polong, kadar hara (N, P dan K), serapan hara (N, P dan K) dan kualitas. Berdasarkan hasil tersebut dapat disimpulkan bahwa pemberian beberapa jenis pupuk daun tidak memberikan pengaruh yang nyata terhadap pertumbuhan dan produksi edamame. Produksi polong relatif tertinggi pada perlakuan pupuk daun Trubus, kristalon hijau, MgSO4 dan ZK (P2), namun dari segi kualitas perlakuan pupuk daun Trubus, kristalon hijau, MgSO4 dan MKP (P1) menghasilkan kualitas ekspor yang relatif lebih tinggi, Edamame is a Japanese soy bean (Glycine max (L) Merrill) cultivar with big pods. Mountainous area of Indonesia has environmental conditions that can support edamame cultivation. This potential, however, should be supported with determination type, dosage, method, time and frequency of fertilizer for effective and efficient fertilization. Fertilization through foliar application done as complement from fertilization through the soil to fulfill in particular, micronutrients. This research was aimed to compare the effect of types of foliar fertilizer to the growth and production of edamame. The research was conducted in field in randomized block design of one factor, that is seven types of foliar fertilizer and three replications, resulted in 21 experimental units. Analysis of variance indicated significant effect to plant high at 21, 28, 35 and 49 days after planting, but no significant effects to number of leaves, number of leaf axils, number of root nodules, weight of above ground biomass, number of pods, pod production, nutrients levels, uptake (N, P, and K) and quality. Overall it can be concluded that the complementary foliar fertilization gave no significant effect to the growth and production of edamame in the study area. Pods production relatively highest at foliar fertilizer treatment of trubus, kristalon hijau, MgSO4 and ZK (P2), but the best quality of edamame at foliar fertilizer treatment of trubus, kristalon hijau, MgSO4 and MKP (P1)
Keyword: soybeans, micro nutrients, spray ferlitizer., Fertilization efficiency

Judul: The Effect of Doses of Layer Chicken Manure and Biofertilizers for Growth, Production, and Quality of Edamame Soybeans (Glycine max (L). Merril
Abstrak: Edamame merupakan kedelai polong muda yang dikonsumsi sebagai sayuran (vegetable soybean). Polong dipanen saat kulit polong masih berwarna hijau sebelum menguning, biji berisi penuh, dan memiliki ukuran yang lebih besar serta rasa yang lebih manis dari kedelai biasa. Pupuk hayati dapat ditambah untuk mengurangi kebutuhan pupuk kandang. Penelitian ini dilakukan untuk mengevaluasi pengaruh pemberian pupuk kandang ayam petelur ditambah pupuk hayati untuk pertumbuhan, produksi, dan kualitas kedelai edamame (Glycine max (L). Merril). Percobaan di lapangan dilaksanakan pada bulan Januari sampai April 2023 di Lahan Organik Kebun Percobaan IPB Cikarawang, Bogor. Penelitian ini menggunakan rancangan petak terpisah (split-plot) dengan petak utama yaitu pupuk hayati dan anak petak berbagai dosis pupuk kandang ayam petelur, dengan 3 ulangan. Dosis pupuk kandang yang digunakan yaitu 0, 8, 16, dan 24 ton ha-1. Perlakuan pupuk hayati yaitu pemberian pupuk hayati konsentrasi 10 ml L-1 dan tanpa pemberian pupuk hayati. Hasil penelitian menunjukkan bahwa peningkatan dosis pupuk kandang ayam meningkatkan tinggi tanaman, jumlah daun, luas daun, indeks luas daun, bobot basah dan bobot kering tanaman, jumlah bunga, dan jumlah buku. Komponen produksi yang dipengaruhi dosis pupuk kandang adalah jumlah polong isi, bobot polong isi per tanaman, bobot polong per petak, bobot basah tanaman saat panen, bobot basah 100 biji, dan produktivitas per petak. Pupuk hayati nyata meningkatkan jumlah daun pada 6 minggu setelah tanam (MST) dan kadar hara N-total daun edamame. Interaksi pupuk kandang ayam dan pupuk hayati berpengaruh nyata terhadap jumlah polong isi, jumlah polong isi 2 biji, dan bobot polong isi per tanaman. Jumlah polong isi dan bobot polong isi per tanaman tertinggi pada dosis 24 ton ha-1 pupuk kandang ayam ditambah pupuk hayati. Produktivitas polong edamame tertinggi adalah 11,4 ton ha-1 dengan dosis pupuk kandang ayam 24 ton ha-1. Dosis pupuk kandang yang optimum untuk produktivitas edamame belum diperoleh., Edamame is a young soybean pod that is consumed as a vegetable (vegetable soybean). The pods are harvested when the pods are still green before they turn yellow, the seeds are full, and have a larger size and sweeter flavor than regular soybeans. Edamame soybean can be cultivated organically with high amount of animal manure as nutrient sources. Biofertilizer can be added to reduce the demand of manure. This study was conducted to evaluate the effect of laying hen manure added with biological fertilizer for the growth, production, and quality of edamame soybean. Field experiment was conducted from January to April 2023 at the Organic Field of IPB Experimental Farm, Cikarawang, Bogor. This study used a split-plot design with biofertilizer as the main plot and various doses of laying hen manure as subplots of with 3 replications. The doses of manure were 0, 8, 16, and 24 tons ha-1. The biofertilizer treatment consisted of 10 ml L-1 and without aplication of biofertilizer. The results showed that increasing the dosage of hen manure increased plant height, leaf number, leaf area, leaf area index, fresh weight, dry weight of plants, flower number and node numbers. Yield components were also affected namely numbers of filled pods, weight of filled pods per plant, pod weight per plot, fresh weight of
Keyword: food fiber, filled pods, organic, protein level

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.
Keyword: