Judul: Pertumbuhan dan Produksi Galur-Galur Padi Sawah pada Tinggi Genangan yang Berbeda
Abstrak: Rice (Oryza sativa L.) is one of the most important cultivated plants, as it is a staple food for the majority of the world population and the Indonesian Society. In line with the times, rice not gets enough water for maximum growth, so it is necessary tolerant rice at a minimum water level. The purpose of this study was to determine the effect of water level on the growth and production of rice and to get rice strains that matched the minimum water level. This study uses a split plot design with three replications. The first factor is the main plots consisting of a pool of high water level 2.5 cm and 0 cm from the soil surface. The second factor is 8 strains rice resistant to the minimum water level. F test results indicate that the water level did not affect the growth and production of eight starins rice tested. Strains tested showed similar vegetative growth, but the visible difference in the production of each strain. At 0 cm water level several strains that produce the maximum is strains 1, 3, 4, and 6.
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Judul: Response of Four Rice Varietas (Oryza sativa L.) at Two Water
Levels in Irrigated Rice Fields
Abstrak: ALDYLLA. Respons Empat Varietas Padi (Oryza sativa L.) pada Ketinggian Dua Muka Air di Lahan Sawah Beririgasi. Dibimbing oleh MUNIF GHULAMAHDI. Ketinggian muka air yang berbeda dan pemilihan varietas yang sesuai adalah salah satu cara untuk peningkatan produktivitas tanaman padi. Penelitian ini bertujuan untuk mengetahui serta membandingkan respons pertumbuhan dan hasil tanaman dari empat varietas padi dengan tinggi muka air yang berbeda. Percobaan ini dilakukan pada bulan Januari hingga April 2024 di UPT Benih Induk Murni Medan-Lubuk PAKAM KM 24, Kabupaten Deli Serdang Provinsi Sumatera Utara. Penelitian ini menggunakan rancangan petak terpisah, dengan 2 petak utama yang terdiri dari 2 taraf yaitu ketinggian muka air di atas permukaan tanah 5 cm dan di bawah permukaan tanah 5 cm , 4 anak petak yang terdiri dari 4 taraf yaitu varietas Mekongga, Inpari 32, Ciherang, Arias. Percobaan diulang sebanyak 3 kali sehingga berjumlah 24 petak percobaan. Hasil penelitian ini menunjukkan bahwa pengaruh ketinggian muka air serta perbedaan varietas berpengaruh nyata pada tinggi tanaman dan jumlah daun kecuali pada umur 4 MST, 6 MST, dan 8 MST. Perlakuan ketinggian muka air dengan varietas juga berpengaruh nyata pada jumlah anakan kecuali pada umur 6 MST, 10 MST dan 14 MST. Pada jumlah anakan produktif, perlakuan tidak berpengaruh nyata kecuali pada umur 16 MST. Perlakuan juga tidak berpengaruh nyata pada komponen hasil kecuali bobot biji per petak pada kadar air 14%. Pertumbuhan tanaman padi pada perlakuan ketinggian muka air 5 cm di bawah permukaan tanah memiliki hasil yang lebih optimum dibandingan dengan 5 cm di atas permukaan tanah. Vaietas Ciherang merupakan varietas yang memiliki hasil pertumbuhan yang lebih baik dibandingkan dengan varietas lainnya. Kata kunci: Produktivitas, varietas, ketinggian muka air., ALDYLLA. Response of Four Rice Varietas (Oryza sativa L.) at Two Water Levels in Irrigated Rice Fields. Supervised by MUNIF GHULAMAHDI. Different water levels and selection of appropriate varieties are one way to increase rice plant productivity. This study aims to determine and compare the growth response and plant yield of four rice varieties with different water levels. This experiment was conducted from January to April 2024 at the UPT Benih Induk Murni Medan-Lubuk PAKAM KM 24, Deli Serdang Regency, North Sumatra Province. This study used a split-plot design, with 2 main plots consisting of 2 levels, namely the water level above the ground surface of 5 cm and below the ground surface of 5 cm, 4 sub-plots consisting of 4 levels, namely the Mekongga, Inpari 32, Ciherang, Arias varieties. The experiment was repeated 3 times, resulting in 24 experimental plots. The results of this study indicate that the effect of water level and differences in varieties have a significant effect on plant height and number of leaves except at the ages of 4 WAP, 6 WAP, and 8 WAP. Treatment of water level with varieties also significantly affected the number of tillers except at the ages of 6 MST, 10 MST and 14 MST. On the number of productive tillers, the treatment did not significantly affect except at the age of 16 MST. The treatment also did not significantly affect the yield components except for the
Keyword: Produktivitas, varietas, ketinggian muka air

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