Judul: Growth and Productivity of Upland Rice from Different Plant Spacing under Productive Oil Palm Plantation
Abstrak: Konsumsi beras yang tinggi seiring dengan meningkatnya jumlah penduduk menjadi tantangan tersendiri bagi Pemerintah Indonesia untuk memenuhi kebutuhan beras. Salah satu upaya yang dapat dilakukan untuk menunjang produktivitas beras adalah menanam padi gogo sebagai tanaman sela di perkebunan. Penelitian ini bertujuan untuk membandingkan varietas dan jarak tanam terhadap pertumbuhan serta hasil padi gogo di bawah naungan kelapa sawit menghasilkan. Penelitian ini dilakukan pada bulan Maret hingga Agustus 2023 di Kebun Percobaan IPB Cikabayan, Dramaga, Bogor. Penelitian ini menggunakan Rancangan Kelompok Lengkap Teracak (RKLT) dua faktor yaitu perlakuan varietas dan jarak tanam. Varietas yang digunakan adalah IPB 9G, IPB 8G, Inpago 12, dan Situ Bagendit. Perlakuan jarak tanam menggunakan jarak tanam 5 cm x 5 cm, 10 cm x 10 cm, 15 cm x 15 cm, dan 20 cm x 20 cm. Hasil penelitian menunjukkan perlakuan varietas berpengaruh nyata terhadap persentase tanaman hidup, tinggi tanaman, jumlah anakan, dan jumlah anakan produktif dengan varietas IPB 9G menunjukkan hasil secara keseluruhan lebih baik. Perlakuan jarak tanam tidak memberikan pengaruh nyata pada semua parameter pengamatan tetapi jarak tanam 20 cm x 20 cm memberikan hasil yang lebih konsisten dibandingkan ketiga jarak tanam lainnya. Kedua perlakuan tidak menunjukkan interaksi yang nyata pada semua parameter pengamatan. Pertumbuhan dan hasil pada padi gogo dibawah naungan kelapa sawit diduga dipengaruhi oleh intensitas cahaya., The higher rice consumption along with the increasing population rate in Indonesia has become a challenge for the Indonesian Government in fulfilling the country’s rice needs. One way to support the rice productivity is to planting upland rice as an intercrop in plantation. This study aims to compare multiple varieties and plant spacing for the growth and productivity of the upland rice under the shade of palms oil plants. The research was conducted from March until August 2023 at Cikabayan Experimental Field of IPB, Dramaga, Bogor. This study used a completely randomized block design two factorial with different varieties and plant spacing. The varieties used in this study were IPB 9G, IPB 8G, Inpago 12, and Situ Bagendit. The plant spacing used in this study were 5 cm x 5 cm, 10 cm x 10 cm, 15 cm x 15 cm, and 20 cm x 20 cm. the result showed the variety treatment has significantly affected the percentage of live plants, plants height, number of tillers, and productive tillers with IPB 9G showing the most consistent result compared to the other varieties. Plant spacing treatment did not show significant differents on all of the observation parameter but the 20 cm x 20 cm spacing showed the better result among the plant spacing treatments. neither the varieties nor plant spacing treatments showed significant interaction in any of the observation parameters. The growth and productivity of upland rice under the shade of palms oil plants can be affected by the light intensity.
Keyword: plant spacing, upland rice, varieties

Judul: Effect of Planting Distance on Growth and Production of Rice (Oryza sativa L.) Bioemas Agritan Variety
Abstrak: Padi (Oryza sativa L.) merupakan sumber karbohidrat penting khususnya bagi masyarakat Indonesia. Kebutuhan beras sebagai bahan pangan masyarakat mengalami peningkatan dari tahun ke tahun karena itu produksi beras perlu ditingkatkan. Penelitian ini bertujuan mempelajari jarak tanam yang tepat pada padi varietas baru yaitu Bioemas Agritan sehingga diperoleh pertumbuhan dan hasil padi yang maksimal. Penelitian dilaksanakan pada November 2022 hingga Mei 2023 di Kebun Percobaan Sawah Baru, dilanjutkan hingga Juli 2023 di laboratorium Pasca panen Departemen AGH, IPB Dramaga, Bogor, Jawa Barat. Penelitian ini menggunakan rancangan kelompok lengkap teracak dengan satu faktor perlakuan yaitu jarak tanam enam taraf. Jarak tanam yang digunakan yaitu jarak 20 cm x 20 cm, 25 cm x 25 cm, 20 cm x 25 cm, 25 cm x 50 cm x 12,5 cm (2:1), 25 cm x 50 cm x 12,5 cm (4:1), 30 cm x 60 cm x 15 cm (4:1). Padi yang digunakan dalam penelitian adalah padi varietas baru yaitu varietas Bioemas Agritan. Hasil penelitian menunjukkan perlakuan jarak tanam pada padi varietas Bioemas Agritan memberikan hasil yang berbeda pada tiap variabel yang diamati. Perlakuan jarak tanam yang diujikan sebagian besar memberikan hasil yang tidak berbeda nyata pada peubah pengamatan kecuali pada peubah tinggi tanaman pada saat 4 MST, jumlah anakan pada saat 5 MST, luas daun dan bobot tajuk dengan hasil yang sangat nyata dan pada peubah jumlah anakan saat 6 MST, panjang malai dan bobot seribu butir memberikan hasil yang nyata. Perlakuan jarak tanam 20 cm x 25 cm menghasilkan produktivitas tertinggi yaitu 6,59 ton ha-1 , namun menurut analisis statistika tidak berbeda nyata dengan perlakuan lainnya., Rice (Oryza sativa L.) is an important source of carbohydrates, especially for the people of Indonesia. The need for rice as food for the community has increased from year to year, therefore rice production needs to be increased. This research aims to study the right planting distance in the new rice variety Bioemas Agritan so as to obtain maximum growth and yield of rice. The research was conducted from November 2022 to May 2023 at the Sawah Baru Experimental Farm, followed by July 2023 at the Post-harvest laboratory of the AGH Department, IPB Dramaga, Bogor, West Java. This study used a randomized complete group design with one treatment factor, namely six levels of planting distance. The spacing used was a distance of 20 cm x 20 cm, 25 cm x 25 cm, 20 cm x 25 cm, 25 cm x 50 cm x 12.5 cm (2:1), 25 cm x 50 cm x 12.5 cm (4:1), 30 cm x 60 cm x 15 cm (4:1). The rice used in the study was a new variety of rice, namely the Bioemas Agritan variety. The results showed that the treatment of plant spacing in Bioemas Agritan rice varieties gave different results on each variable observed. Most of the plant spacing treatments tested gave results that were not significantly different in the observation variables except for the variables of plant height at 4 weeks of planting, number of tillers at 5 weeks of planting, leaf area and crown weight with very real results
Keyword: bioemas agritan, jarak tanam, produksi, produktivitas padi, bioemas agritan, spacing, production, rice productivity

Judul: Pelabelan Super Vertex Magic
Abstrak: Super vertex magic labeling is labeling on graph with is a set of edges mapped into and is a set of vertices mapped into . It has a vertex magic labeling in which and represents the size and order of the graph respectively. This manuscript proves that paths, cyclics, and disjoint union of cyclics have a super vertex magic labeling. There are four theorems to be discussed. The first theorem proves that path is super vertex magic if and only if is odd and . The second theorem proves that cyclic is super vertex magic if and only if is odd. The third theorem proves that bijection function from an edge set onto of graph can be extended to a super vertex magic labeling if and only if the set amount of edge label that incidents with a vertex in the graph, consists of sequential integers as many as vertices in the graph. The fourth theorem proves that disjoint union of the cyclics consists of cyclics with each cyclic has vertices is super vertex magic if and only if and are odd.
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