Judul: The Effect of Inorganic Boric Fertilizer on the Growth and Production of Sweet Corn in Dramaga Latosol
Abstrak: Pemupukan unsur mikro diperlukan terutama pada tanah-tanah pertanian yang intensif, salah satunya boron. Boron (B) merupakan unsur hara mikro esensial yang berperan penting dalam peningkatan produksi tanaman. Penelitian ini bertujuan menguji efektivitas pupuk an-organik borat terhadap pertumbuhan dan produksi jagung manis (Zea mays saccharata Sturt). Percobaan ini menggunakan Rancangan Acak Kelompok satu faktor, yaitu delapan perlakuan kombinasi pupuk borat (B) dan pupuk NPK Standar (NPK) meliputi: (1) Kontrol (tanpa B dan tanpa NPK); (2) Standar (tanpa B + 1 NPK); (3) ½ B + 3/4 NPK; (4) 1 B + 3/4 NPK; dan (5) 1½ B + 3/4 NPK; (6) ½ B + 1 NPK; (7) 1 B + 1 NPK; (5) 1½ B + 1 NPK. Setiap perlakuan diulang 4 kali sehingga diperoleh 32 satuan percobaan. Satu dosis pupuk borat (1 B) setara dengan 12 kg/ha pupuk an-organik borat (46% B2O3). Satu dosis NPK standar adalah 300 Urea/ha, 200 SP36/ha, dan 150 KCl/ha. Hasil penelitian menunjukkan bahwa pupuk borat nyata meningkatkan, bobot segar brangkasan, dan produksi tongkol jagung manis, serta mengefisienkan pemupukan NPK. Pemupukan borat nyata meningkatkan produksi tongkol dibanding Kontrol, namun tidak berbeda nyata dibanding Standar. Rekomendasi pemupukan jagung manis menggunakan pupuk an-organik borat adalah 12 sampai 18 kg/ha.
Keyword: Boron, fertilization efficiency, RAE, trace elements, Zea mays

Judul: Response of Fertilizing B and NPK to the growth of sweet  corn plants (Zea mays L. Saccharata) on Dramaga Inceptisols
Abstrak: Jagung manis (Zea mays L. Saccharata) adalah salah satu tanaman pangan dan bahan baku industri di Indonesia dan dunia. Peningkatan produktivitas jagung manis dapat dilakukan melalui optimasi pemupukan nitrogen (N), fosfor (P), kalium (K) dan boron (B) merupakan hara makro dan mikro esensial yang dibutuhkan tanaman jagung untuk dapat tumbuh dan berkembang serta berproduksi secara optimal. Penelitian ini bertujuan untuk mengetahui kandungan B dan NPK dalam tanah dan tanaman serta pertumbuhan dan perkembangan jagung manis sebagai respon dari kombinasi pemberian pupuk mikro B dan NPK pada Inceptisol Dramaga. Penelitian menggunakan Rancangan Acak Kelompok (RAK) dengan delapan perlakuan (B0S0, B0S1, B1S1, B2S1, B3S1, B1S2, B2S2, B3S2) yang terdiri dari empat taraf B (0, 9, 18, 27 kg/ha) dan tiga taraf NPK (0%, 75% dan 100% std). Perlakuan diulang kedalam empat kelompok menghasilkan 32 petak percobaan. Kombinasi pemberian pupuk B dan NPK signifikan meningkatkan B tersedia dalam tanah. Selain itu, pemberian pupuk B dan NPK meningkatka panjang daun, dan kadar B dalam tanaman serta mempercepat umur berbunga betina (silking). Pemberian 9-18 kg/ha B dan 75% NPK memiliki pengaruh positif yang relatif konsisten pada semua parameter agronomis yang diteliti. Perlu adanya penelitian lanjutan untuk melihat pengaruh pemberian pupuk B dan NPK terhadap produksi jagung manis pada tanah dengan kesuburan yang berbeda-beda, serta kombinasi waktu dan cara pemupukan B., Sweet corn (Zea mays L. Saccharata) is one of the staple crops and raw materials for the industry in Indonesia and globally. Increasing the productivity of sweet corn can be achieved through the optimization of nitrogen (N), phosphorus (P), potassium (K), and boron (B) fertilization, which are essential macro and micronutrients required for the optimal growth, development, and production of corn plants. This research aims to determine the content of B and NPK in soil and plants, as well as the growth and development of sweet corn in response to the combination of B and NPK micro-fertilizer application in Inceptisol Dramaga. The study utilized a Randomized Complete Block Design (RCBD) with eight treatments (B0S0, B0S1, B1S1, B2S1, B3S1, B1S2, B2S2, B3S2) consisting of four levels of B (0, 9, 18, 27 kg/ha) and three levels of NPK (0%, 75%, and 100% standard). The treatments were replicated into four blocks, resulting in 32 experimental plots. The combination of B and NPK fertilizer application significantly increased the available B in the soil. Additionally, B and NPK fertilization enhanced leaf length, and B content in the plants, as well as accelerate the female flowering age (silking). The application of 9-18 kg/ha B and 75% NPK showed a relatively consistent positive influence on all agronomic parameters studied. Further research is needed to examine the impact of B and NPK fertilizer application on sweet corn production in soils with varying fertility and explore the timing and methods of B fertilization
Keyword: Availability, boron, NPK, soil parameters, sweet corn

Judul: Posisi Filogenetik Kura-Kura Carettochelys Insculpta  (Reptillia: Testudinata)
Abstrak: Carettochelys insculpta is an endemic freshwater turtle of southern Papua and northern Australia. Phylogenetic position of this turtle is remain unresolved until now. Most of the research conducted show close relationships of C. insculpta and members of Trionychidae family. However, some of the research show distance between C. insculpta and members of Trionychidae family. This research is conducted to analyze phylogenetic relationship between C. insculpta and other members of Testudinata using 12S rRNA, 16S rRNA, and both gene as markers. DNA samples were obtained from three different organisms of C. insculpta. Two species used as outgroups were Alligator mississippiensis and Iguana iguana. Phylogenetic analysis was carried out using Neighbor-Joining method with Felsenstein 1981 (F81) modeltest. A polytomy tree of Testudinata was produced by using 12S rRNA gene. However, analysis using 16S rRNA and both genes as markers confirmed that C. insculpta was located between the Chelonidae and the Trionychidae family.
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