Judul: Seed Health and Germination of  Nyamplung and Kenari on Various Media
Abstrak: Nyamplung (Calophyllum inophyllum L.) dan kenari (Canarium indicum L.) mempunyai banyak manfaat dan potensi (sejarah, ekonomi, energi, ekologi, sosial) sehingga perlu dilakukan perbanyakan tanaman untuk meningkatkan produktivitasnya. Penelitian ini bertujuan mengetahui kondisi fisik benih, kesehatan benih (hama dan penyakit terbawa benih), serta media perkecambahan optimal benih nyamplung dan kenari dengan perlakuan media tanah (kontrol), zeolit, cocopeat, serta campuran tanah dan pasir (1:1 v/v). Kondisi fisik benih nyamplung yang baik berbentuk bulat tebal dan keras, berwarna kuning gading, apabila ditekan tidak lunak, rata-rata beratnya 3 g, rata-rata tingginya 2,6 cm, dan rata-rata diameter 1,7 cm. Kondisi fisik benih kenari yang baik di antaranya berbentuk lonjong meruncing dengan cangkang yang sangat keras, berwarna cokelat muda, rata-rata beratnya 6,9 g, rata-rata tinggi dan diameternya berturutturut 3,7 cm dan 1,9 cm. Cendawan terbawa benih nyamplung adalah Rhizoctonia sp. dan Pythium sp., sedangkan pada benih kenari yaitu Collectotrichum sp.. Media perkecambahan terbaik bagi nyamplung yaitu zeolit, sedangkan media perkecambahan terbaik untuk benih kenari yaitu campuran tanah dan pasir (1:1 v/v)., Nyamplung (Calophyllum inophyllum L.) and kenari (Canarium indicum L.) have many benefits and potentials (historical, economic, energy, ecological, social) so it is necessary to propagate plants to increase their productivity. This study aims to determine the physical condition of seeds, seed health (pests and diseases carried by seeds), and optimal germination media of nyamplung and kenari seeds with soil (control) media treatment, zeolite, cocopeat, soil and sand mixture (1:1 v/v). The good physical conditions of nyamplung seeds are thick and hard round shape, ivory yellow color, when pressed it is not soft, the average weight is 3 g, the average height is 2.6 cm, and the average diameter is 1.7 cm. The good physical conditions of kenari seeds are a tapered oval shape with a very hard shell, light brown in color, an average weight of 6.9 g, an average height and diameter of 3.7 cm and 1.9 cm, respectively. The fungi carried by nyamplung seeds are Rhizoctonia sp. and Pythium sp., while in kenari seeds is Collectotrichum sp.. The best germination medium for nyamplung seeds is zeolite, while the best germination medium for kenari seeds is a mixture of soil and sand (1:1 v/v).
Keyword: cendawan, kesehatan benih, kondisi fisik benih, media perkecambahan

Judul: Pemanfataan Media Tanam Miko-seedcookies pada Tanaman Nyamplung (Calophyllum inophyllum) di Lahan Pascatambang Kapur
Abstrak: Proses penambangan menyebabkan penurunan sifat-sifat tanah termasuk penurunan kesuburan tanah. Tanaman nyamplung memiliki kemampuan adaptasi yang baik terhadap kondisi lingkungan yang keras, termasuk lahan pascatambang kapur. Miko-seedcookies merupakan media tanam yang mengandung Fungi Mikoriza Arbuskula (FMA) yang berperan dalam meningkatkan penyerapan nutrisi dan ketersediaan air tanaman. Tujuan dari penelitian adalah 1) mengetahui pengaruh diameter miko-seedcookies terhadap perkecambahan dan pertumbuhan tanaman dan mendapatkan ukuran diameter media yang tepat, dan 2) menganalisis pengaruh miko-seedcookies yang dikombinasikan dengan teknik direct seeding dan peran FMA terhadap perkecambahan benih nyamplung di lahan pascatambang. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok (RAK) dengan 2 perlakuan, yaitu diameter miko-seedcookies 5 cm dan 6 cm. Hasil penelitian menunjukkan bahwa perbedaan diameter miko-seedcookies tidak berpengaruh signifikan terhadap perkecambahan benih nyamplung dan pertumbuhan vegetatif tanaman nyamplung. Penanaman menggunakan media tanam miko-seedcookies yang mengandung mikoriza dengan teknik penanaman direct seeding mampu mempercepat perkecambahan benih nyamplung., The mining process causes a decrease in soil properties, including soil fertility. Nyamplung plants adapt well to harsh environmental conditions, including lime post-mining land. Miko-seedcookies are planting media containing Arbuscular Mycorrhizal Fungi (AMF), increasing nutrient absorption and water availability. The purposes of this study were 1) to determine the effect of the diameter of miko seedcookies on germination and plant growth and to obtain the right size of the diameter of the media, and 2) to analyze the effect of miko-seedcookies combined with direct seeding techniques and the role of AMF on nyamplung seed germination in post-mining land. The experimental design used was a Randomized Group Design (RBD) with 2 treatments, namely miko-seedcookies diameter of 5 cm and 6 cm. The results showed that the difference in diameter of miko-seedcookies did not significantly affect the germination of nyamplung seeds and the vegetative growth of nyamplung plants. Planting using miko-seedcookies planting media containing mycorrhiza with direct seeding technique can accelerate the germination of nyamplung seeds.
Keyword: AMF, Calophyllum inophyllum, Miko-seedcookies, Reclamation

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