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Aspect Physiology Plant of Cauliflower (Brassica oleracea var botrytis L.) in the Interval of Nitrogen Fertilization, Dose and Type of Organic Fertilizer in Coastal Sandy Land Supriyanto, Supriyanto; Saparso, Saparso; Rif'an, Muhammad
PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science) Vol 8, No 2 (2020)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.2020.117.75-82

Abstract

Cauliflower is one of the vegetables that have the ability to adapt to coastal sandy land. Cauliflower production can be increased by extensification efforts using coastal sandy land. The research aimed to determine the type of liquid organic fertilizer, the fertilization interval of liquid organic fertilizer, and the appropriate dose of nitrogen fertilizer for the growth and productivity of cauliflower plant on coastal sandy land. The research was conducted in Jetis sandy beach, Banjarsari Village, Nusawungu Sub-district, Cilacap Regency. The study was conducted from August 2017 to November 2017. The experiment was arranged in a Factorial Randomized Complete Block Design (RCBD). Data were analyzed by F test followed by DMRT 5%. The results showed that (1) type of artificial liquid organic fertilizer gave best result on the dry root weight and chlorophyll b. (2) The 9-day-interval of liquid organic fertilizer application interval gave the best result on the fresh root weight and fresh plant weight, while the 4-day-interval of liquid organic fertilizer application gave the best result on dry flower weight. (3) The doses of N fertilizer significantly affected leaf area, root volume, fresh root weight, fresh leaf weight, dry leaf weight, fresh plant weight, dry plant weight, fresh stem weight, dry stick weight, fresh flower weight, flower weight dry, and flower diameter.
Sensorless-BLDC motor speed control with ensemble Kalman filter and neural network Rif'an, Muhammad; Yusivar, Feri; Kusumoputro, Benyamin
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 10, No 1 (2019)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2980.121 KB) | DOI: 10.14203/j.mev.2019.v10.1-6

Abstract

The use of sensorless technology at BLDC is mainly to improve operational reliability and play a role for wider use of BLDC motors in the future. This research aims to predict load changes and to improve the accuracy of estimation results of sensorless-BLDC. In this paper, a new filtering algorithm is proposed for sensorless brushless DC motor based on Ensemble Kalman filter (EnKF) and neural network. The proposed EnKF algorithm is used to estimate speed and rotor position, while neural network is used to estimate the disturbance by simulation. The proposed algorithm requires only the terminal voltage and the current of three phases for estimated speed and disturbance. A model of non-linear systems is carried out for simulation. Variations in disturbances such as external mechanical loads are given for testing the performance of the proposed algorithm. The experimental results show that the proposed algorithm has sufficient control with error speed of 3 % in a disturbance of 50 % of the rated-torque. Simulation results show that the speed can be tracked and adjusted accordingly either by disturbances or the presence of disturbances.
EVALUASI KESESUAIAN LAHAN PADI GOGO PADA TIGA KAWASAN AGROEKOSISTEM DI KABUPATEN JAYAWIJAYA Mahanani, Anti Uni; Tuhuteru, Sumiyati; Haryanto, Totok Agung Dwi; Rif'an, Muhammad
Jurnal Tanah dan Sumberdaya Lahan Vol 7, No 1 (2020)
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2020.007.1.10

Abstract

The people of Papua currently tend to consume rice continuously every year compared to local food. The purpose of this study was to determine the adaptive and high yielding upland rice varieties in three agroecosystem zones of Jayawijaya Regency. Testing of five varieties has been carried out in three agroecosystem zones in Jayawijaya Regency, namely zone 1 with an altitude of 1882 m above sea level (Walelagama District), zone 2 with an altitude of 2145 m above sea level (Kurulu District), and zone 3 with an altitude of 2653 m above sea level (Sogokmo District). The results showed adaptive Wamena Local (Moai) varieties growing in the three agroecosystem areas, which were seen in the parameters of plant height and number of leaves, followed by INPAGO INPARI 28 varieties. Meanwhile, in the production parameters achieved, INPAGO INPARI 28 varieties produced the highest panicles and grains in Walelagama District at 124.33 panicles and 10.62 t grains ha-1. Whereas in the Kurulu District (Zones 1 and 2) were 124.33 panicles and 3.53 t grains ha-1. The Sogokmo District was shown by INPAGO 9 variety (86.00 panicles and 2.97 t grains ha-1).
Aspect Physiology Plant of Cauliflower (Brassica oleracea var botrytis L.) in the Interval of Nitrogen Fertilization, Dose and Type of Organic Fertilizer in Coastal Sandy Land Supriyanto, Supriyanto; Saparso, Saparso; Rif'an, Muhammad
PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science) Vol 8, No 2 (2020)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.2020.117.75-82

Abstract

Cauliflower is one of the vegetables that have the ability to adapt to coastal sandy land. Cauliflower production can be increased by extensification efforts using coastal sandy land. The research aimed to determine the type of liquid organic fertilizer, the fertilization interval of liquid organic fertilizer, and the appropriate dose of nitrogen fertilizer for the growth and productivity of cauliflower plant on coastal sandy land. The research was conducted in Jetis sandy beach, Banjarsari Village, Nusawungu Sub-district, Cilacap Regency. The study was conducted from August 2017 to November 2017. The experiment was arranged in a Factorial Randomized Complete Block Design (RCBD). Data were analyzed by F test followed by DMRT 5%. The results showed that (1) type of artificial liquid organic fertilizer gave best result on the dry root weight and chlorophyll b. (2) The 9-day-interval of liquid organic fertilizer application interval gave the best result on the fresh root weight and fresh plant weight, while the 4-day-interval of liquid organic fertilizer application gave the best result on dry flower weight. (3) The doses of N fertilizer significantly affected leaf area, root volume, fresh root weight, fresh leaf weight, dry leaf weight, fresh plant weight, dry plant weight, fresh stem weight, dry stick weight, fresh flower weight, flower weight dry, and flower diameter.