Judul: Optimasi Dosis Pupuk Anorganik dan Pupuk Kandang Ayam pada Budidaya Tomat Hibrida (Lycopersicon esculentum Mill. L.).
Abstrak: The objective of this research was know the effect of fertilizer and manure to growth and productivity of hybrid tomato (Lycopersicon esculentum Mill. L).This research obtained at Pasir Sarongge Experimental Field University Farm Bogor Agricultural University, Cipanas, from February to July 2011. The experimental design used was Completely Randomized Block Design, with two factors and three repetitions. First factor was manure dosages which were 0, 10, 20, and 30 ton ha-1. Second factor was fertilizer dosages which were 0%, 75%, and 150% of recommended dosage. Recommended dosage use was 100 kg ha-1 N, 100 kg ha-1 P2O5, and 50 kg ha-1 K2O, recommendation from Ministry of Agriculture (2002). Plant height showed quadratic response to manure at 2 and 4 week after transplanted (WAT), then linier at 6 WAT. As to fertilizer, plant height showed no response at 2 WAT yet showed linier response at 4 and 6 WAT. Interaction between manure and fertilizer happened at 8 WAT. Manure gave linier response to number of leaves at 2, 4, and 8 WAT but not significant at 6 WAT. Fertilizer gave no significant response at number of leaves. Manure gave quadratic response as fertilizer gave linier response to fruit weight per plot, fruit weight per hectare estimation, and relative yield. Optimal manure dosage given from this research was 24.375 ton ha-1. Maximum fruit weight per plot was 17.41 kg per plot. Maximum fruit weight per hectare estimation was 22.79 ton ha-1. Manure gave linier response to fruit weight per plot of grade A and B. Fruit weight per plot of grade C, fruit diameter, and average fruit weight was not affected by manure or fertilizer given.
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Judul: Pertumbuhan dan Produksi Tomat (Lycopersicon esculentum Mill.) Organik dengan Beberapa Dosis Pupuk Kandang Ayam dan Pupuk Hayati.
Abstrak: Perhatian masyarakat terhadap produk dan pertanian organik semakin meningkat. Penggunaan pupuk kandang dan pupuk hayati dalam sistem pertanian organik sangat penting bagi penyediaan hara tanaman dan perbaikan struktur fisik tanah. Tujuan dari penelitian ini adalah untuk mempelajari pengaruh pupuk kandang ayam dan pupuk hayati serta interaksinya terhadap pertumbuhan dan produksi tanaman tomat secara organik. Percobaan dilakukan di Kebun Percobaan IPB Cikarawang, Dramaga, Bogor, bulan Februari-Juni 2016. Rancangan percobaan yang digunakan adalah split plot design dengan tiga ulangan. Petak utama adalah dosis pupuk hayati (0, 2, 4 tablet/10 m2). Anak petak adalah dosis pupuk kandang ayam (0, 10, 20, dan 30 ton ha-1). Tinggi tanaman, diameter batang, dan jumlah daun menunjukkan respon linier positif terhadap dosis pupuk kandang sampai dengan 8 MST. Pupuk kandang berpengaruh sangat nyata pada bobot brangkasan, bobot per buah, bobot per tanaman, jumlah buah per tanaman, panjang buah, dan kekerasan buah. Pupuk hayati memberikan pengaruh nyata terhadap peubah bobot basah dan bobot kering akar. Pengaruh interaksi pupuk kandang dan pupuk hayati nyata pada peubah jumlah daun umur 8 MST.
Keyword: nutrisi tanaman, pertanian organik, sayuran organik

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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