Judul: Pengendalian gulma pada tanaman padi sawah dengan menggunakan herbisida berbahan aktif Bentazon dan MCPA
Abstrak: Weeds are one of major problem in rice intensification. The objective of this research was to observe the effectiveness of bentazon and MCPA as mixed herbicide to control weeds in rice. The experiment was conducted at Bojong Jengkol village, Ciampea district, Bogor regency, West Java from September 2012 until January 2013. This research was arranged in Randomized Block Design with single factor, seven treatments and four replications. The treatments consist of seven treatments with five dosages of herbicide (i.e.: 1.00 L ha-1, 1.50 L ha-1, 2.00 L ha-1, 2.50 L ha-1, and 3.00 L ha-1), conventional weeding (at third and sixth week after transplanted) and no weeding. The result showed that bentazon-MCPA application could control sedges (Fimbristylis miliacea and Cyperus iria) and broadleaf (Ludwigia octovalvis, Alternanthera philoxeroides, and Portulaca oleracea) weeds. Application of bentazon-MCPA caused light-fair toxicity symptomps on rice plants until 2 weeks after application and decreased empty grain percentage about 6-10 % compared with no weeding treatment also increased rice yield productivity about 48.6% and that was not significantly different compared with conventional weeding.
Keyword: Bogor Agricultural University (IPB), weed in rice, weed control, Bentazon & MCPA

Judul: Pengendalian Gulma Padi Sawah dengan Herbisida Berbahan Aktif Bispyribac Sodium
Abstrak: One of the main problems on increasing rice production is weeds. The objective of this research was to determine the effectiveness of bispyribac sodium herbicide to control weed in paddy field. The experiment was conducted in Cibanteng village, Bogor regency, West Java from November 2012 to February 2013. The research was arranged at randomized block design with four replications which consisted of eight bispyribac sodium treatments i.e: 50 ml ha-1, 100 ml ha-1, 150 ml ha-1, 200 ml ha-1, 250 ml ha-1, 300 ml ha-1, manual weeding and no weeding. The result showed that the application of bispyribac sodium herbicide at a dose of 50 ml ha-1 to 300 ml ha-1 could control Ludwigia octovalvis, Echinocloa crus-galli, Fimbristylis miliacea, Eclipta prostata and Cynodon dactylon weed species. Bispyribac sodium application at all dosages only caused lightweihgt Phytotoxicity Syimptoms on rice plants
Keyword: weed, rice, dosage, bispyribac sodium herbicide

Judul: Sifat optik dan sifat listrik diode schottky film Barium Titanat (BaTiO3) berstruktur emas - BaTiO3 (Metal – ferroelektrik)
Abstrak: Diode Schottky (emas - BaTiO3) berhasil dibuat dengan ditumbuhkan di atas permukaan interdigital electrode berbahan emas(Au) menggunakan metode Chemical Solution Deposition (CSD) . Film BaTiO3 dibuat dengan proses annealing pada suhu 400oC dengan variasi holding time annealing 4 jam dan 10 jam. Karakterisasi sifat optik diode Schottky dilakukan menggunakan UV-Vis Spektrofotometer untuk memperoleh nilai energi gap Film BaTiO3. Nilai energi gap BaTiO3 pada dua perlakuan holding time annealing 4 jam dan 10 jam sebesar 3.27 eV dan 3.21 eV dan nilai energi gap tersebut termasuk dalam kategori semikonduktor. Karakterisasi sifat listrik diode Schottky dilakukan menggunakan LCR Meter yang didapatkan nilai konduktivitas listrik pada Holding time annealing 10 jam lebih besar daripada 4 jam. Kemudian, didapatkan nilai impedansi yang menunjukkan bahwa pada holding time annealing 4 jam lebih besar daripada holding time 10 jam. Didapatkan pula nilai konstanta dielektrik yang menunjukkan pada waktu holding time annealing 4 jam lebih besar daripada 10 jam.
Keyword: Barium titanat, diode schotty, ferroelektrik, sifat optik, sifat listrik, emas, metal