Judul: The Effect of 1000 Grain Weight on Field Emergence, Plant Growth and Production of Several Rice Varieties (Oryza sativa L.)
Abstrak: Benih bermutu memiliki peran penting dalam keberhasilan budidaya tanaman. Mutu benih yang tercantum pada kemasan benih bersertifikat hanya kadar air benih, daya berkecambah dan kemurnian benih. Nyatanya, masih banyak peubah mutu lain yang belum tercantum salah satunya bobot 1000 butir. Penelitian ini bertujuan untuk mengetahui pengaruh perbedaan bobot 1000 butir benih terhadap viabilitas dan vigor benih, field emergence, pertumbuhan dan hasil produksi padi. Percobaan disusun dalam Rancangan Kelompok Lengkap Teracak (RKLT) dengan tiga perlakuan, yaitu benih dengan bobot 1000 butir tinggi, sedang dan rendah. Percobaan dilakukan pada tiga varietas padi, yaitu Ciherang, Inpari 32 dan Inpari 42. Bobot 1000 butir benih berpengaruh nyata pada daya hantar listrik benih, tinggi bibit, jumlah daun bibit, bobot kering bibit dan pertumbuhan tanaman padi pada ketiga varietas yang diuji. Perbedaan bobot 1000 butir benih tidak berpengaruh nyata terhadap peubah viabilitas dan vigor lainnya, indeks luas daun, umur berbunga, komponen hasil dan produksi pada ketiga varietas yang diuji. Benih dengan bobot tinggi memiliki kemampuan untuk tumbuh menjadi bibit yang kuat dan dapat mempercepat masa persemaian dari ketiga varietas yang diuji. Benih dengan rentang bobot tinggi dan sedang memiliki pertumbuhan vegetatif yang lebih baik dibandingkan dengan benih berbobot rendah., Quality seeds have an important role in the success of plant cultivation. The quality listed on the certified seed packaging is only the moisture content, germination and seed purity. In fact, there are many other quality variables that have not been listed, one of which is 1000 grain weight. This study aims to determine the effect of differences in 1000 grain weight on viability and vigor, field emergence, growth and yield. The experiment was arranged in a Completely Randomized Block Design (CRBD) with three treatments, namely high, medium and low 1000 grain weight seeds. The experiment was carried out on three rice varieties, Ciherang, Inpari 32 and Inpari 42. The 1000 grain weight significantly affected the electrical conductivity, seedling height, seedling leaves, dry weight of seeds and growth in three varieties tested. The difference in 1000 grain weight did not significantly affect on other viability and vigor variables, leaf area index, flowering age, yield and production components in three varieties tested. Seeds with high weight have the ability to grow into strong seedlings and can accelerate the seeding period of the three varieties tested. Seeds with high and medium weight ranges had better vegetative growth compared to low weight seeds.
Keyword: nursery, productivity, seedling

Judul: The Effect of Delaying Fertilization Time on Production and Quality of IPB 3S Rice Seeds
Abstrak: Distribusi pupuk subsidi dari pemerintah kepada petani sering mengalami keterlambatan sehingga menyebabkan petani tidak dapat melakukan pemupukan dengan tepat waktu. Penelitian ini bertujuan untuk mengetahui pengaruh penundaan waktu pemupukan terhadap produksi dan mutu benih padi (Oryza sativa L.) varietas IPB 3S. Rancangan yang digunakan dalam penelitian ini adalah rancangan kelompok lengkap teracak (RKLT) satu faktor, yaitu waktu pemupukan yang terdiri atas empat taraf dengan tiga kali ulangan. Taraf pertama atau kontrol adalah waktu pemupukan pada saat 7, 21, dan 35 HST. Taraf kedua terdiri atas waktu pemupukan pada 7, 28, dan 35 HST. Taraf ketiga terdiri atas waktu pemupukan pada 7, 21, dan 42 HST. Taraf keempat terdiri atas waktu pemupukan pada 7, 28, dan 42 HST. Hasil penelitian menunjukkan bahwa penundaan waktu pemupukan selama satu minggu tidak memberikan pengaruh terhadap produksi benih padi varietas IPB 3S, akan tetapi berpengaruh terhadap mutu fisik dan fisiologis benih. Penundaan pemupukan pada fase generatif mampu meningkatkan indeks vigor dan bobot kering kecambah normal, sedangkan penundaan pemupukan pada fase vegetatif dan generatif sekaligus dapat menurunkan bobot 1000 butir benih., The distribution of subsidized fertilizers from the government to farmers is often late. This causes farmers unable to apply fertilizers on time. This study aims to determine the effect of delaying fertilization time on the production and quality of IPB 3S rice seeds. The research used randomized complete block design (RCBD) with one factor. The factor was difference of fertilization time which consist of four levels and three replicates. The first level or the control is the time of fertilization at 7, 21, and 35 DAT. The second level consists of fertilization time at 7, 28, and 35 DAT. The third level consists of fertilization time at 7, 21, and 42 DAT. The fourth level consists of fertilization time at 7, 28, and 42 DAT. The result showed that the delay in fertilization time for one week had no effect on the production of IPB 3S rice seeds, but had an effect on the physical and physiological quality of the seeds. Delaying fertilization in the generative phase can increase the vigor index and dry matter of normal seeds, while delaying fertilization in the vegetative and generative phases simultaneously can reduce the weight of 1000 seeds.
Keyword: fertilizer, NPK, silica, nitrogen, vigor index

Judul: Pelabelan Super Vertex Magic
Abstrak: Super vertex magic labeling is labeling on graph with is a set of edges mapped into and is a set of vertices mapped into . It has a vertex magic labeling in which and represents the size and order of the graph respectively. This manuscript proves that paths, cyclics, and disjoint union of cyclics have a super vertex magic labeling. There are four theorems to be discussed. The first theorem proves that path is super vertex magic if and only if is odd and . The second theorem proves that cyclic is super vertex magic if and only if is odd. The third theorem proves that bijection function from an edge set onto of graph can be extended to a super vertex magic labeling if and only if the set amount of edge label that incidents with a vertex in the graph, consists of sequential integers as many as vertices in the graph. The fourth theorem proves that disjoint union of the cyclics consists of cyclics with each cyclic has vertices is super vertex magic if and only if and are odd.
Keyword: