Judul: Studi Konsumsi Air, Respon Pertumbuhan dan Produksi Dua Varietas Padi pada Beberapa Sistem Pengairan
Abstrak: Water is one of the important inputs to support the growth and development of plants. Currently, water availability tend to be more limited due to environmental quality degradation and global warming. This study was conducted to determine the amount of water consumption of two rice varieties (IR-64 and Jatiluhur) in four irrigation systems (conventional, water-saturated, intermittent, and upland). The study was performed using a split block design with three replications. Upland system planted with direct seeding, while for others system transplanted at 12 days old seedling. Rice plants were grown under plastic house with 3 m x 3 m area per experimental unit, and water volume recorded by flowmeter in inlet systems. Observed variable consist of growth component, stomatal charactheristics, productivity and production component. The results showed that the conventional system consumed the highest volume of water (426,768 l) in one seasson. The least consumption of water reached by upland system (3,883 l), while the water saturated system consumed 74.3% and intermittent consumed 37.9% of conventional system water consumption. In the other hand, the intermittent and conventional systems had higher productivity than water saturated and upland sytems. There were no significantly different between varieties in water consumption. However, the yields of Jatiluhur variety produced higher grain per plot than IR-64 variety. The highest efficiency of water consumption reached by upland system (0.531 g/l), the second was intermittent system (0.020 g/l), and the lowest were conventional and water saturated systems (0.008 g/l).
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Judul: Response of Four Rice Varietas (Oryza sativa L.) at Two Water
Levels in Irrigated Rice Fields
Abstrak: ALDYLLA. Respons Empat Varietas Padi (Oryza sativa L.) pada Ketinggian Dua Muka Air di Lahan Sawah Beririgasi. Dibimbing oleh MUNIF GHULAMAHDI. Ketinggian muka air yang berbeda dan pemilihan varietas yang sesuai adalah salah satu cara untuk peningkatan produktivitas tanaman padi. Penelitian ini bertujuan untuk mengetahui serta membandingkan respons pertumbuhan dan hasil tanaman dari empat varietas padi dengan tinggi muka air yang berbeda. Percobaan ini dilakukan pada bulan Januari hingga April 2024 di UPT Benih Induk Murni Medan-Lubuk PAKAM KM 24, Kabupaten Deli Serdang Provinsi Sumatera Utara. Penelitian ini menggunakan rancangan petak terpisah, dengan 2 petak utama yang terdiri dari 2 taraf yaitu ketinggian muka air di atas permukaan tanah 5 cm dan di bawah permukaan tanah 5 cm , 4 anak petak yang terdiri dari 4 taraf yaitu varietas Mekongga, Inpari 32, Ciherang, Arias. Percobaan diulang sebanyak 3 kali sehingga berjumlah 24 petak percobaan. Hasil penelitian ini menunjukkan bahwa pengaruh ketinggian muka air serta perbedaan varietas berpengaruh nyata pada tinggi tanaman dan jumlah daun kecuali pada umur 4 MST, 6 MST, dan 8 MST. Perlakuan ketinggian muka air dengan varietas juga berpengaruh nyata pada jumlah anakan kecuali pada umur 6 MST, 10 MST dan 14 MST. Pada jumlah anakan produktif, perlakuan tidak berpengaruh nyata kecuali pada umur 16 MST. Perlakuan juga tidak berpengaruh nyata pada komponen hasil kecuali bobot biji per petak pada kadar air 14%. Pertumbuhan tanaman padi pada perlakuan ketinggian muka air 5 cm di bawah permukaan tanah memiliki hasil yang lebih optimum dibandingan dengan 5 cm di atas permukaan tanah. Vaietas Ciherang merupakan varietas yang memiliki hasil pertumbuhan yang lebih baik dibandingkan dengan varietas lainnya. Kata kunci: Produktivitas, varietas, ketinggian muka air., ALDYLLA. Response of Four Rice Varietas (Oryza sativa L.) at Two Water Levels in Irrigated Rice Fields. Supervised by MUNIF GHULAMAHDI. Different water levels and selection of appropriate varieties are one way to increase rice plant productivity. This study aims to determine and compare the growth response and plant yield of four rice varieties with different water levels. This experiment was conducted from January to April 2024 at the UPT Benih Induk Murni Medan-Lubuk PAKAM KM 24, Deli Serdang Regency, North Sumatra Province. This study used a split-plot design, with 2 main plots consisting of 2 levels, namely the water level above the ground surface of 5 cm and below the ground surface of 5 cm, 4 sub-plots consisting of 4 levels, namely the Mekongga, Inpari 32, Ciherang, Arias varieties. The experiment was repeated 3 times, resulting in 24 experimental plots. The results of this study indicate that the effect of water level and differences in varieties have a significant effect on plant height and number of leaves except at the ages of 4 WAP, 6 WAP, and 8 WAP. Treatment of water level with varieties also significantly affected the number of tillers except at the ages of 6 MST, 10 MST and 14 MST. On the number of productive tillers, the treatment did not significantly affect except at the age of 16 MST. The treatment also did not significantly affect the yield components except for the
Keyword: Produktivitas, varietas, ketinggian muka air

Judul: Konstruksi Hukum Grup Kurva Eliptik Atas F3m
Abstrak: Elliptic curves upon F3m can be divided in two cases, i.e. supersingular and nonsupersingular case. Based on group laws on elliptic curves, a new arithmetic upon F3m can be formulated as an addition process of two random points on the curve. This addition process can then be applied to the ElGamal algorithm.
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