Judul: Interaction of shade intensity and fertilization rate on growth and harvest of pohpohan (Pilea trinervia Wight)
Abstrak: Penelitian ini dilakukan untuk memperoleh tingkat naungan dan dosis pupuk yang sesuai untuk pertumbuhan dan hasil pohpohan. Penelitian dilakukan di Pusat Kajian Hortikultura Tropika IPB, Tajur dari Maret sampai Juli 2013. Penelitian ini menggunakan Rancangan Kelompok Lengkap Teracak (RKLT) 2 faktor. Faktor pertama merupakan tingkat naungan, N0 (tanpa naungan), N1 (naungan 55%) dan N2 (naungan 75%). Faktor kedua merupakan dosis pemupukan P1 (0 kg ha-1), P2 (50 kg ha-1), P3 (100 kg ha-1), P4 (150 kg ha-1) dan P5 (200 kg ha-1). Tanaman pohpohan dipupuk pada umur 3, 6 dan 8 MST (Minggu Setelah Tanam) dengan pupuk dosis NPK 15-15-15 (N 15%: P2O5 15%: K2O 15%). Hasil percobaan menunjukkan bahwa naungan 55% mampu meningkatkan tinggi tanaman dan diameter batang. Jumlah daun, jumlah cabang dan bobot layak pasar meningkat secara kuadratik pada pemberian dosis optimum. Pohpohan lebih baik apabila ditanam pada tingkat naungan 55% dengan dosis pupuk 88.3 to 104.5 kg ha-1., The objective of this study was to find out the optimum percentage of shading and fertilizer rate on pohpohan. The research was conducted at Center for Tropical Horticulture Studies IPB, Tajur from March until July 2013. This research was arranged in a Randomized Completely Block Design 2 factors. The first factor was a level of shade, N0 (no shade), N1 (55% shade) and N2 (75% shade). The second factor was rate of fertilizer, at rates of P1 (0 kg ha-1), P2 (50 kg ha-1), P3 (100 kg ha-1), P4 (150 kg ha-1) dan P5 (200 kg ha-1). Pohpohan were fertilized in 3, 6 and 8 weeks after planting with NPK 15-15-15 (N 15%: P2O5 15%: K2O 15%). Result of the research showed that 55% shades increased the plant height and diameter of stem. Number of leaves, number of branches and of marketable yield were quadratically increased with fertilizer application. Poh-pohan plants prefered growing at shade 55% with NPK fertilization 88.3 to 104.5 kg ha-1. Key words: fertilizer, growth, indigenous vegetable, Pilea trinervia, shading
Keyword: naungan, pertumbuhan, Pilea trinervia, pupuk, sayuran indigenous

Judul: Interaksi Intensitas Naungan dan Dosis Pemupukan pada Pertumbuhan dan Hasil Pohpohan (Pilea trinervia Wight.)
Abstrak: The objective of this study was to find out the optimum percentage of shading and fertilizer rate on pohpohan. The research was conducted at Center for Tropical Horticulture Studies IPB, Tajur from March until July 2013. This research was arranged in a Randomized Completely Block Design 2 factors. The first factor was a level of shade, N0 (no shade), N1 (55% shade) and N2 (75% shade). The second factor was rate of fertilizer, at rates of P1 (0 kg ha-1), P2 (50 kg ha-1), P3 (100 kg ha-1), P4 (150 kg ha-1) dan P5 (200 kg ha-1). Pohpohan were fertilized in 3, 6 and 8 weeks after planting with NPK 15-15-15 (N 15%: P2O5 15%: K2O 15%). Result of the research showed that 55% shades increased the plant height and diameter of stem. Number of leaves, number of branches and of marketable yield were quadratically increased with fertilizer application. Poh-pohan plants prefered growing at shade 55% with NPK fertilization 88.3 to 104.5 kg h
Keyword: shading, Pilea trinervia, indigenous vegetable, growth, fertilizer

Judul: Pelabelan Super Edge Magic pada Graf Cycle dan Graf Wheel
Abstrak: This manuscript proves that cycle graph and wheel graph have a super edge magic labeling. Super edge magic labeling on a graph is labeling that has an edge magic labeling with a set of vertices were mapped in to {1,2,… ,𝑝} and a set of edges were mapped in to {𝑝+1,𝑝+2,… ,𝑝+𝑞}, in which 𝑝 is order and 𝑞 is size on the graph. There are one lemma and two theorems to be discussed. The lemma is used to prove the two theorems. The first theorem proves that cycle graph 𝐶𝑛 is super edge magic if and only if 𝑛 is odd. The second theorem proves that wheel graph 𝑊𝑛 of order 𝑛 is not super edge magic. Moreover 𝑊𝑛 is not edge magic if 𝑛≡0 mod
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