Judul: Pengaruh bahan organik dan paket pupuk NPK terhadap petumbuhan dan produksi padi gogo (Oryza sativa L.) varietas sentani pada latosol Darmaga, Bogor
Abstrak: Penelitian ini bertujuan untuk mengamati pengaruh pemberian bahan organik dan pemupukan NPK terhadap pertumbuhan dan produksi padi gogo verietas Sentani serta kadar N, P, K tanaman. -Penanaman dilakukan di rumah kaca Jurusan Tanah, Fakultas Pertanian, Institut Pertanian Bogor. Tanaman yang digunakan sebagai tanaman indikator adalah padi gogo varietas Sentani dan sebagai media tanamnya digunakan latosol Darmaga, Bogor. Perlakuan yang diberikan meliputi dua faktor. Faktor pertama adalah bahan organik, diberikan dalam tiga taraf dengan notasi BO (0 ton/ha), B1 (40 ton/ha) dan B2 (80 ton/ha). Faktor kedua berupa paket pupuk NPK, diberikan dalam tiga taraf dengan notasi P1 Ppm N, 0 ppm P, 0 ppm K), P2 (100 ppm N, 150 ppm ppm K) dan P3 (200 ppm N, 300 ppm P, 200 ppm K). P, (0 100 Parameter yang diamati meliputi jumlah tanaman maksimum. jumlah tanaman produktif, bobot jerami. bobot gabah total, bobot gabah bernas dan bobot brangkasan. Analisis tanaman setelah panen meliputi kadar hara nitrogen, fosfor dan kalium. Bahan Organik dan paket pupuk NPK berpengaruh sangat nyata terhadap jumlah tanaman maksimum, jumlah tanaman produktif, bobot jerami, bobot gabah total, bobot gabah bernas dan bobot brangkasan, sedangkan interaksinya berpengaruh nyata. tidak Secara umum pemberian bahan organik dan paket pupuk NPK sampai dosis tertinggi dalam penelitian ini yaitu 80 ton/ha untuk bahan organik dan 200 ppm N, 300 ppm P dan 200 ppm K untuk paket pupuk NPK masih nyata meningkatkan komponen pertumbuhan dan produksi tanaman. ...
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Judul: Pengaruh pemberian bahan organik dan paket pupuk NPK terhadap pertumbuhan dan produksi padi gogo varietas Sentani pada Orthoxic Tropudults
Abstrak: Penelitian ini dilatarbelakangi oleh usaha-usaha mencukupi kebutuhan pangan di Indonesia terutama padi gogo yang produksinya masih jauh lebih kecil dibandingkan dengan produksi padi sawah. Tujuan penelitian adalah untuk mempelajari inter- aksi bahan organik dan paket pupuk NPK, serta mendapatkan kombinasi yang terbaik dari bahan organik dan paket pupuk NPK terhadap pertumbuhan dan produksi padi gogo varietas Sentani. Penelitian dilakukan di Kebun Percobaan Fakultas Pertanian, IPB Darmaga dan analisa tanah dilakukan di Laboratorium Kesuburan dan Kimia Tanah, Jurusan Tanah, Fakultas Pertanian, IPB Bogor. Pelaksanaannya dimulai sejak bulan Januari sampai dengan Juni 1994. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok Faktorial dengan menggunakan dua faktor. Faktor pertama adalah bahan organik (B) yang diberikan dalam empat taraf yang terdiri dari (1) B0 (tanpa penambahan bahan organik, (2) B1 (15 ton/ha), (3) B2 (30 ton/ha), dan (4) B3 (45 ton/ha). Faktor kedua adalah paket pupuk NPK yang diberikan dalam empat taraf yang terdiri dari: (1) PO (tanpa penambahan paket pupuk NPK), (2) P1 (50 kg Urea + 50 kg TSP + 75 kg KCI)/ha, (3) P2 (75 kg Urea + 75 kg TSP + 100 kg KCI)/ha, dan (4) P3 (100 kg Urea + 100 kg TSP + 150 kg KCI)/ha. Setiap perlakuan terdiri dari tiga ulangan. Parameter yang diamati meliputi pertumbuhan vegetatif (tinggi tanam- an dan jumlah anakan (anakan maksimum)) serta pertumbuhan generatif (jumlah anakan produktif dan produksi)...dst
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Judul: Algorithm construction of HLI hash function
Abstrak: Cryptography is a study of mathematical techniques related to aspects of information security regarding on confidentiality, data integrity, entity authentication, and data origin authentication. Data integrity is a service, which is associated with the conversion of data carried out by unauthorized parties. To maintain data integrity, one can use hash functions. An hash function is a computationally efficient function to map an arbitrary length bitstring to a fixed length bitstring called as hash value. The use of hash function in maintaining the information integrity and authentication is in digital signatures, virus protection, and software distribution. Illustration of the hash function in the integrity and authentication of information that is emailed as follow. The sender sends the information and hash value to the recipient. If the hash value of the information is equal to the hash value that is sent by the sender, then information has not been changed. Otherwise the information has been changed. An hash function has two properties, one way and collision resistance. An hash function is called one way if it is computationally infeasible to find any input such that when given any hash value . Meanwhile an hash function is called collision resistant if it is computationally infeasible to find any two inputs where such that . The purpose of this study is to construct a HLI hash function algorithm, to analyze the speed and security of the hash functions as a results of construction. Furthermore, it is to compare it with SWIFFT. Hash function is constructed based on the result of algebraic operations on modular polynomial ringwith . Modular polynomial ring noted as is a set of all polynomials of degree at most with coefficients in . can be represented as a set of integer vector of modulo in dimension . So, it is simple to implement in a computer. In vector operations, is lattice . Furthermore, alattice that is defined from certain polynomial ring is called ideal lattice. HLI hash function is consists of addition and multiplication algorithm in the ring. Addition algorithm consists of sumation operations of modulo and multiplication consists of multiplication operations of modulo . Generally, algorithm of HLI hash function consists of multiplication operations of modulo and addition operations of modulo . However, if the input is binary number then multiplication algorithm only consists of multiplication operation of modulo , so algorithm of HLI hash function consists of multiplication operations of modulo and addtion operations of modulo . An hash function is secured if it has two properties, i.e., one way and collision resistance. HLI hash function hash is one way, it is following the proof of Micciancio. It is has collision resistant because of polynomial is irreducible over and monic. Moreover, it is proved that for every unit vector , the vector is small vector. If the input of hash function is a binary number then HLI hash function only involves addition operations of modulo . So the time that used almost same with SWIFFT. The excellence of HLI hash function is the key size smaller than SWIFFT. This effect on
Keyword: hash function, modular polynomial ring, lattice