Judul: Effect of Liming on Production  and Quality of Stylosanthes (Stylosanthes guianensis(Aubl)Sw) in UP#J Feild
Abstrak: Penelitian ini bertujuan bertujuan mengoptimasi level pengapuran terhadap produktivitas dan kualitas dari tanaman leguminosa S. guianensis. Penelitian dilaksanakan selama 4 bulan di Unit Pendidikan dan Penelitian Peternakan Jonggol (UP3J) dan Laboratorium Nutrisi Ternak Perah, Departemen Ilmu Nutrisi dan Teknologi Pakan, Fakultas Peternakan IPB. Rancangan Penelitian yang digunakan dalam penelitian ini adalah rancangan acak lengkap (RAL) dengan empat perlakuan yaitu : 0 ton ha-1 dolomit (D0), 1 ton ha-1 (D1), 2 ton ha-1 (D2), dan ton ha-1 (D3). Variabel yang diamati yaitu pH tanah setelah diberi dolomit, produktivitas tanaman (tinggi tanaman, jumlah daun tanaman, berat segar tanaman, berat kering tanaman, serta N,P,K tanaman. Pemberian perlakuan 3 ton ha-1 (D3) memberikan hasil terbaik terhadap pertumbuhan dan produksi S. guianensis dibandingkan dengan perlakuan lainnya.
Keyword: dolomite, NPK, productivity, S. guianensis

Judul: Optimization of Dolomite Lime Based Calcification Doses on Plant Growth and Alfalfa Production
Abstrak: Alfalfa (Medicago sativa L.) berpotensi dibudidayakan di daerah tropis sebagai pakan ternak. Pengapuran diperlukan untuk mendukung pertumbuhan dan produksi alfalfa. Penelitian ini bertujuan untuk mendapatkan dosis pengapuran dolomit yang optimum terhadap pertumbuhan dan produktivitas tanaman alfalfa (Medicago sativa L.) pada tanah latosol di daerah tropis. Penelitian didesain menggunakan rancangan acak lengkap (RAL) yang terdiri dari 5 perlakuan dan 30 ulangan. Perlakuan terdiri dari AD0 = 0 ton ha-1 dolomit; AD1 = 1 ton ha-1 dolomit; AD2 = 2 ton ha-1 dolomit; AD3 = 3 ton ha-1 dolomit; AD4 = 4 ton ha -1 dolomit. Data dianalisis menggunakan analysis of variance (ANOVA) yang dilanjutkan dengan uji Duncan jika terdapat beda nyata (P<0,05) pada pH tanah, viabilitas tanaman, tinggi tanaman, diameter batang, jumlah cabang, jumlah daun, kerontokan daun, warna daun dan produksi tanaman. Kesimpulan dari penelitian ini, pemberian dosis dolomit 4 ton ha-1 menunjukkan hasil paling optimal dalam meningkatkan pertumbuhan dan produksi tanaman alfalfa., Alfalfa (Medicago sativa L.) is considered to have the potential to be cultivated in tropical regions as animal feed. Liming is required to support the growth and production of alfalfa. This study aimed to determine the optimal dosage of dolomite liming for the growth and productivity of alfalfa (Medicago sativa L.) on latosol soils in the tropics. The study was designed using a completely randomized design (CRD) with 5 treatments and 30 replications. The treatments included AD0 = 0 tons ha-1 dolomite; AD1 = 1 tons ha-1 dolomite; AD2 = 2 tons ha 1 dolomite; AD3 = 3 tons ha-1 dolomite; AD4 = 4 tons ha-1 dolomite. The data were analyzed using analysis of variance (ANOVA) followed by Duncan's test if significant differences were found (P<0.05) soil pH, plant viability, plant height, stem diameter, branches count, leaves count, leaves loss, leaves color and plant production. In conclusion, the application of 4 tons ha-1 showed the most optimal results in increasing the growth and production of alfalfa plants.
Keyword: alfalfa, dolomite, liming, plant growth, plant production

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