Judul: Analisis Produktivitas Beberapa Tipe Padi
Abstrak: This research was carried out in November 2012 until April 2013. The objective of this research was to study the productivity of some types of rice and some factors that influence it. Four varieties of rice were used. The varieties are Mentik Wangi as a local variety, IPB 3S as a new plant type of rice, Inpari 13 as a new variety of rice and Hipa 8 as a hybrid type. A Randomized Complete Blocked Design with three replications using for this experiment. This research was conducted at Muara Experiment station. The result showed that Inpari 13 had a high productivity, 6 ton ha-1. The variety may use the assimilates in stems and alocate the dry matter during grain filling effectively. In addition, the resistance of Inpari 13 against bacterial leaf blight attack is one of the factors that cause the high productivity
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Judul: Productivity of Four Types of Rice Varieties and The Effect of  Paclobutrazol on Grain Size of Rice in Irrigated Paddy Fields
Abstrak: Penggunaan empat tipe varietas padi diharapkan dapat memperoleh jenis tipe varietas yang menghasilkan produktivitas tertinggi. Varietas padi tipe japonica menunjukkan adaptasi pertumbuhan yang lambat. Penelitian bertujuan mempelajari keragaan karakter agronomi dan produktivitas empat tipe varietas padi di lahan sawah irigasi. Penelitian dilaksanakan di Kebun Percobaan Sawah Baru, Departemen Agronomi dan Hortikultura, IPB University pada bulan Februari sampai Juni 2020. Rancangan percobaan menggunakan desain Rancangan Kelompok Lengkap Teracak (RKLT) 3 ulangan, sehingga diperoleh 12 satuan percobaan. Sebagai tambahan terhadap perlakuan tipe varietas, pada masimg masing perlakuan dicoba diaplikasikan ZPT paclobutrazol sebanyak 2 kali dengan konsentrasi kontrol (0), 5, 10, 15, dan 20 ppm. Hasil penelitian menunjukkan bahwa empat tipe varietas padi yang diteliti memiliki hasil yang berbeda pada beberapa karakter yang diamati meliputi, tinggi tanaman, jumlah anakan, panjang malai, jumlah gabah total per malai, dan jumlah gabah bernas per malai. Pemberian paclobutrazol (5, 10, 15, 20 ppm) pada keempat tipe varietas padi yang diuji tidak menunjukan perubahan hasil yang signifikan terhadap karakter bobot 1000 butir dan produktivitas., The use of four types of rice varieties is expected to obtain the types of varieties that produce the highest productivity. Japonica rice varieties show slow growth adaptation. This research aimed to obtain the agronomic characteristics and productivity of four types of rice varieties in irrigated paddy fields. The experiment was conducted at Sawah Baru Experimental Garden, Department of Agronomy and Horticulture, IPB University from February to June 2020. The experiment was arranged in Randomized Complete Block Design (RCBD) with 3 replications, so that 12 experimental units were obtained. In addition to the variety type treatment, paclobutrazol was used for each treatment twice with control concentrations (0), 5, 10, 15, and 20 ppm. The results showed that the four types of rice varieties studied had different results on several observed characters including plant height, number of tillers, panicle length, total number of grain per panicle, and number of full grain per panicle. The application of paclobutrazol (5, 10, 15, 20 ppm) to the four types of rice varieties tested did not show significant changes in 1000 grain weight and productivity.
Keyword: Akitakomachi, 1000 grain weight, Hipa 18, Inpari 42, IPB 3S, Paclobutrazol

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