Judul: Pengujian formula pupuk NK Blend dan Super Nitro Potash (SNP) terhadap tanaman jagung (Zea mays L.) pada latosol Darmaga
Abstrak: The changes of land use from agricultural farm to the others utilizing pressed the number of agricultural area especially food plant. The decreasing of soil productivity as a consequence the decreace of soil element especially nitrogen and potassium aggravated the production and agricultural farm condition. To anticipate this condition, it is important to keep the the nutrient equilibrium in the soil in order to guarantee the growth and plant production. One of solution to keep to solve this problem is by using NK Blend and Super Nitro Potash (SNP) fertilizer. This research was aimed to test the formula of NK Blend and Super Nitro Potash (SNP) fertilizer concerning to the growth and maize crop production as well as to get the most effectiveness dosage which is able to result high production. The test plant used in this research was hybrid maize.
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Judul: Uji Efektivitas Pupuk Majemuk NPK terhadap Pertumbuhan, Produksi, dan Kadar NPK Tanaman Jagung (Zea Mays) di Latosol Dramaga
Abstrak: Jagung (Zea mays) merupakan salah satu komoditas pertanian yang ekonomis dan berpeluang untuk dikembangkan. Jagung biasanya digunakan sebagai bahan baku industri makanan, industri kimia, industri farmasi, dan pakan ternak karena jagung memiliki nilai gizi yang baik. Agar produktivitas tanah tetap terjaga perlu dilakukan pemupukan dan pemberian bahan organik. Tujuan penelitian ini adalah untuk mengetahui pengaruh pemberian pupuk majemuk NPK terhadap pertumbuhan, serapan hara, produksi dan kualitas tanaman jagung hibrida pada latosol Dramaga. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok (RAK) dengan 8 perlakuan dan 3 kali ulangan. Kombinasi perlakuan terdiri dari Kontrol, NPK Std, 0.5 NPK uji, 0.75 NPK uji, S 1.0 NPK uji, 1.25 NPK uji, 1.50 NPK uji, 1.75 NPK uji. Variabel yang diukur pada penelitian ini yaitu pertumbuhan tinggi dan lingkar batang tanaman, perbaikan sifat kimia tanah (N-total, P-tersedia, K-dd, Ca-dd, dan Mg-dd), kadar N, P, K serta produksi tanaman. Perlakuan dosis pupuk majemuk NPK dan NPK std nyata meningkatkan K-dd tanah, tinggi batang jagung, kadar N, P, dan K tanaman, bobot basah brangkasan, bobot kering brangkasan, bobot tongkol dengan kelobot, bobot tongkol tanpa kelobot, serta panjang tongkol dan lingkar tongkol jagung, tetapi tidak berpengaruh nyata meningkatkan N-total, P-tersedia, Ca-dd, dan Mg-dd tanah. Tinggi dan keliling batang jagung yang tertinggi terdapat pada perlakuan 1.75 NPK uji. Produksi tongkol jagung yang tertinggi terdapat pada dosis 1.75 NPK uji. Nilai RAE (Relative Agronomic Effectiveness) dari semua perlakuan NPK uji memiliki hasil lebih tinggi dibandingkan dengan perlakuan NPK std. Semakin meningkatnya dosis pupuk majemuk NPK uji, nilai RAE yang dihasilkan cenderung semakin meningkat.
Keyword: Corn, Fertilizer, Arganic material, Latosol Soil, Productivity of soil, Jagung hibrida, Analisis RAE

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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