Judul: Pengaruh efektifitas herbisida diuron 500 g/l sc dalam pengendalian gulma pada tanaman tebu (Saccharum officinarum l)
Abstrak: The experiment was conducted to test the efficacy of Diuron 500 g/l SC berbicice of weeds in sugar cane cultivation is inferred based on statistical analysis of the target weed species biomass data. The experiment was conducted PT. PG.PG Rajawali II Unit.. Subang is located in block cidangdeur Pasirbungur village, District Purwadadi, Subang regency, West Java, in January 2011 to March 2011. Experimental design used in this study was a randomized complete randimized design (RKLT) with one factor. This study used six treatments with four rplications. The treatment given is : (P1) Diuron 500 g/I SC with a dose of 0.5 i/ha, (P2)Diuron 500 g/l SC with a dose of 1.0/ha, (P3 Diuron 500 g/l SC with a dose of 2.0 i/ha, (P4) Diuron 500 g/l SC at a dose of 3.0 i/ha, (P5) Manual Weeding, (P6) Control. Diuron 500 g/l SC herbicide effectively suppress weed growth by 10 MSA. In statistical calculations, the average herbicide treatment with a dose of 0.5l/ha, 1.0l/ha, 2.0 l/ha, and 3.0 l/ha showed no significant difference in controlling weed growth an dsignificantly different from control treatment. During the trial found no symptoms of poisoning at treatment doses of 0.5-2.0 l/ha, but on treatment with a dose of 3.0.1 /ha showed mild toxicity scoring or not too harmful
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Judul: Studi efektivitas dua formulasi ametryne dalam mengendalikan gulma pada pertanaman tebu (Saccharum officinarum L.) dilahan kering
Abstrak: Tujuan penelitian ini adalah untuk mengetahui efektifitas dua formulasi ametryne pada beberapa tingkat dosis dalam mengendalikan gulma pada pertanaman tebu (Saccharum officinarum L.) di lahan kering. Penelitian dilaksanakan di perkebunan tebu lahan kering PTP XIV Jati Tujuh, Kabupaten Indramayu, Jawa Barat. Ketinggian tempat berada 13. 50 m di atas permu- kaan laut dengan jenis tanah mediteran ultik dan curah hujan rata-rata 1 834.1 mm/tahun. Penelitian dilaksanakan dari tanggal 28 Januari sampai 22 April 1995. Bahan penelitian yang digunakan adalah pertanaman tebu varietas ROC 11 yang berumur 4 hari sesudah tanam. Bahan perlakuan yang digunakan dalam penelitian yaitu ametryne 50% (w/v) dan ametryne 80% (w/w). Rancangan percobaan yang digunakan adalah Rancangan Petak Terbagi yang disusun secara faktorial, dengan rancangan lingkungan Rancangan Acak Kelompok. Perlakuan terdiri dari dua faktor yaitu jenis formulasi sebagai petak utama yang terdiri dari dua formulasi yaitu ametryne 50% (w/v) dan ametryne 80% (w/w), dan dosis herbisida sebagai anak petak yang terdiri atas 6 taraf yaitu 0, 1, 2, 3, 4 1(kg)/ha dan 2 1(kg)/ha (herbisida pembanding).
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Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology