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Pengaruh Pasang Surut terhadap Pengendapan Lumpur di Lahan Sawah Rawa Kawasan Sungai Barito Kalimantan Selatan M Mawardi; Putu Sudira; Bambang Hendro Sunarminto; Totok Gunawan; Benito Hadi Purwanto
agriTECH Vol 38, No 3 (2018)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (749.36 KB) | DOI: 10.22146/agritech.33863

Abstract

Swamp land has a great potential to be developed as a paddy field area. However it has many constraints such as-phyrite (FeS2) at the depth of 30–60 cm and lack of soil nutrition. On the other hand, supply of marine clay from the sea which contains a lot of smektit clay mineral can be used to netralize this condition. Mud clay is very important for the development of rice root because it contains much nutrition and to enlarge the top of soil reducing the oxidation of phyrite. This study was conducted from January 2016 to June 2017 in swamp land area of Barito River of South Kalimantan. Data was collected by measuring the difference between maximum and minimum sea tide (tidal amplitude) and the deposition of mud clay. The results indicated that the distribution of mud clay deposit vary depends on the geography and the tidal amplitude of the zone. Zone VII has higher concenration of mud clay than the other one. The distribution pattern of mud clay deposit follows the parabola type, verticaly and horizontaly type, as well. Increasing of mud clay at all of the zone areas are not significantly effected by the daily tidal amplitude, only depends on climate condition/the season change.
Penerapan Sistem Monitoring Lahan dan Analisa Neraca Air Klimatik Pertanian di Lahan Gambut Bayu Dwi Apri Nugroho; Sri Nuryani Hidayah Utami; Benito Heru Purwanto
agriTECH Vol 39, No 2 (2019)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (586.896 KB) | DOI: 10.22146/agritech.43507

Abstract

Farming in peatland can produce a commodity well if it follows the right planting calendar. Microclimate conditions in the peatland cannot yet be measured in real-time within a shorter time interval. Pelalawan, a region where most of its farmers use peatland for oil palm cultivation, need guidance on applying the best method of oil palm cultivation, which is  possible to improve. This study aims to apply a telemetric based (field monitoring system) real-time climatic data application to monitor the agricultural field (peatland). Climate data and weather – soil sensors were set up in Pelalawan village from August 18 to November 16, 2018. Besides, the advancement of planting calendar determination method is also done for peatland farming with a climatic water balance analysis. The change in peatland farming has been successfully observed and measured. The changes in the climatic environment can be observed continuously within a time interval of 30 minutes. Sun radiation data show a significant fluctuation shift from day to day. It also occurs for rainfall, temperature and humidity data. Climatic data fluctuation can be monitored directly and continuously with a Field Monitoring System (FMS) application. Water balance for paddy and corn is obtained based on Plant Water Need and Effective Rain. The recommended schedule according to water balance analysis (surplus and deficit) is paddy 1 – corn – paddy 2.
Pengaruh Pemupukan Kalium Klorida dan Natrium Silikat Terhadap Umur Pajang Bunga Potong Kembang Kertas (Zinnia elegans Jacq.) Heri Suryono, Aziz Purwantoro, Benito Heru Purwanto
Vegetalika Vol 2, No 1 (2013)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/veg.1616

Abstract

Tujuan penelitian ini adalah untuk mengetahui pengaruh kombinasi dosis pupuk Kalium dan Silikat yang diberikan kepada tanaman kembang kertas (Zinnia elegans Jacq.) terhadap umur pajang bunga potong kembang kertas (Zinnia elegans Jacq.) setelah panen. Penelitian dilaksanakan di Kebun Tridharma Banguntapan, Bantul. Sedangkan analisa tanah dilakukan di Laboratorium Tanah Umum dan Kimia Kesuburan Tanah Fakultas Pertanian UGM Yogyakarta dan Laboratorium Penelitian dan Pengujian Terpadu UGM Yogyakarta. Penelitian menggunakan Rancangan Acak Kelompok Lengkap dengan 2 faktor perlakuan dan 3 ulangan. Faktor pertama adalah jenis pupuk yaitu pupuk Si dan pupuk Kalium. Faktor kedua adalah dosis pupuk yaitu untuk pupuk Si 0 kg/Ha; 11,2 kg/Ha; 22,4 kg/Ha dan untuk pupuk Kalium 0 kg/Ha; 100 kg/Ha; 200 kg/Ha. Hasil penelitian menunjukkan bahwa kombinasi dosis pemupukan Si dan K dapat meningkatkan diameter tangkai bunga, meningkatkan kekerasan tangkai bunga, serta memperpanjang umur pajang bunga potong kembang kertas. Pemberian dosis pupuk K 100 kg/Ha dan Si 11,2 kg/Ha menghasilkan umur pajang bunga potong kembang kertas paling lama yaitu selama 6,3 hari.Kata kunci: Silikon, Kalium, Zinnia elegans Jacq.
Analisis Cluster Sebaran Hara Makro dan Rekomendasi Pemupukan untuk Tanaman Tebu (Saccharum officinarum Linn.) Basuki Basuki; Benito Heru Purwanto; Bambang Hendro Sunarmito; Sri Nuryani Hidayah Utami
Jurnal Ilmu Pertanian Vol 18, No 3 (2015): December
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (190.096 KB) | DOI: 10.22146/ipas.10614

Abstract

Shallot Growth and Yields Based on Ammonium:Nitrate Ratio on Coastal Sandy Soil Wiji Safitri; Endang Sulistyaningsih; Benito Heru Purwanto; Stephen Harper
Jurnal Ilmu Pertanian Vol 2, No 2 (2017): August
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2544.368 KB) | DOI: 10.22146/ipas.18333

Abstract

Nitrogen was a key component for increasing yield and quality of vegetables like shallots. The growth and development of plants were influenced by nitrogen form. Common plants preferred nitrate for growth, but the enormity preference varies within plant species and other environmental factors. The purpose of this experiment was to study the effect of ammonium:nitrate ratio in sandy soil to growth and yield of shallot (Allium cepa L. Aggregatum group). The experiment had been conducted in August-October 2015 in the sandy land on Samas Beach, Bantul, Yogyakarta, Indonesia. The research was arranged in a Split-Plot design. The main plot was the source of nitrogen (NH4+; NO3-; NH4+: NO3- 1:1; NH4+: NO3- 1:2; and NH4+: NO3- 2:1) and the subplot was cultivars (Crok Kuning, Tiron, and Bima Brebes). Each subplot covered an area of 2.5 m² (2.5 m x 1 m) with three blocks as replications. Shallot bulbs were planted in sixth-row, spacing 20 cm between rows and 15 cm within rows. The dose was applied according to the recommendation of BPTP (urea 200 kg ha-1, ZA 250 kg ha-1, SP-36 150 kg ha-1, and KCl 150 kg ha-1) 144.5 kg N ha-1. Ammonium:nitrate ratio influenced shallot growth in sandy soil through number of leaves at maximum vegetative phase and its leaf area. The NH4+: NO3- 1:2 ratio gave the best result in dry weight of leaves following bulb dry weight than other ratio. Nevertheless, ammonium:nitrate ratio had no significant influence on bulb dry weight (ton ha-1).
Application of Lime and Gypsum and Their Effect on Micronutrients (Fe, Zn, Mn, and Cu) Uptake of Sugarcane Planted in Central Lampung Ultisols Christoporus Sudradjat Widiarso; Benito Heru Purwanto; Eko Hanudin; Azwar Ma’as
Jurnal Ilmu Pertanian Vol 2, No 2 (2017): August
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1338.331 KB) | DOI: 10.22146/ipas.25805

Abstract

Most of sugarcane are cultivated on Ultisols with low inherent soil fertility in Central Lampung. This experiment aimed to observe the effect of lime (CaCO3) and gypsum (Ca2SO4) on Fe, Zn, Mn, and Cu uptake of sugarcane. The experiment was conducted in Experimental Research Field of Gula Putih Mataram Enterprise, Central Lampung District. The experiment was designed using a split-plot, which consisted of lime application as the main plot and gypsum application as the sub plotwith three replications. The results showed that there were no significant influence of lime and gypsum application on micronutrient content of the soil. However, application of 2 and 3 tons of lime/ha could reduce soil Fe content about 349.86 and 328.07 ppm respectively within 0-20 cm soil in depthand it was significantly lower than comparing to Fe content (around 457.68 ppm) in control. Similarly, the effect of gypsum application at 0.25 ton.ha-1 decreased Fe content (355.42 ppm), while Fe content of non-gypsum application soil showed around 410.34 ppm. The analysis of other micronutrients did not indicate asignificant effect of lime or gypsum application.
Effect of Humic Acid and Molybdate on Phosphate Adsorption in Typic Hapludult of Cigudeg, Bogor Heri Wibowo; Benito Heru Purwanto; Supriyanto Notohadisuwarno
Jurnal Ilmu Pertanian Vol 2, No 3 (2017): December
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.31093

Abstract

Humic acids containing carboxyl and hydroxyl groups that have the ability to cover the P adsorption  site in Typic Hapludults. Molybdate has similarity behaviour with phosphate in theacid soils. Research aim was to study the effects of molybdate and humic acid to the kinetics of phosphate adsorption in Typic Hapludults of Cigudeg, Bogor. Important of kinetics is to get accuration of materials transport, to control influence on anion mobility, that the assessment is needed for the efficient application of Mo and P. Aplication humic acid and molybdate as competitor anion of phosphate was conducted with combination of humic acid and Mo concentration as double anions. Many models describe the kinetics for the adsorption of phosphate by soils i.e. zero order, first order, second order, and Elovich. As ststistically, there was not interaction of humic acid and molybdate on P adsorption. Application of humic acid with rate of 100 mg.L-1 was not effective decrease P adsorption in Typic Hapludults. It was due to the pH of the adsorption system that get near to its pKa of carboxyl gruop about 5. Meanwhile aplication 2 and 5 mmol.L-1 of molybdate significantly decrease of P adsorption. The second order kinetics models apropriate to the adsorptionof P in the Typic Hapludults of Cigudeg, with determination coefficients value (R2) of  0.999-1 and standard error  value (SE) of 0.001–0.011.The results suggest that the molybdate as competitor anion affected the kinetics for the adsorption of phosphate due to the charge of molybdate.
Water Use Efficiency in Vertical Cropping System with Volcanic Ash Media by Using Biochar and Urban Waste Compost Fertilizer as Soil Amendement Mulyono Nitisapto; Azwar Maas; Benito Heru Purwanto; Putu Sudira
Jurnal Ilmu Pertanian Vol 4, No 1 (2019): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1789.457 KB) | DOI: 10.22146/ipas.34304

Abstract

Applying volcanic ash as planting media has to cope with several constrains: it quickly became sediment and hardened when exposed to water. One of the efforts to improve its physical condition is by utilizing biochar, which is one of amendment materials that can improve the soil quality. This study used vertical column container made from PVC to enable vertical plant arrangement. Volcanic ash requires additional nutrient intake from organic fertilizer such as urban waste compost. The objective of this study was to identify the proper dose combination of volcanic ash, biochar, urban waste compost fertilizer and column population per m2 to sustain the growth of curly lettuce in vertical cropping system, as well as the water use efficiency. This study was designed by using the Completely Randomized Design (CRD) Factorial with three factors. The first, second and third factors consisted of Biochar M1, M2 and M3 (25; 33; and 50 %), compost fertilizer doses of K1, K2, and K3 (25; 33; and 50 %), and column density of P1, P2 and P3 (4 columns/m2, 3 columns/m2 and 2 columns/m2), respectively. The total combination was 3 x 3 x 3 and each was repeated 3 times. Resulted data of this study consisted of growth and crops and analyzed by using the Analysis of Variance and continued with the HSD Tukey 5% Test (Honest significant deference). The water use efficiency (g/kg) can be formulated as the production of dry material per total water during the cultivation season (g/kg). Results of this study showed the highest fresh consumption result was obtained from treatment M3K3 in 556 g/column (comparison of volcanic ash, charcoal husk and compost = 25 : 25 : 50 %) and the best water-use efficiency was 2.30 g/kg.
Growth and Yield Response of Maize (Zea mays L.) on Acid Soil to Different Rates of Humic Acid and NPK Fertilizer Putri Wulandari; Endang Sulistyaningsih; Suci Handayani; Benito Heru Purwanto
Jurnal Ilmu Pertanian Vol 4, No 2 (2019): August
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (268.804 KB) | DOI: 10.22146/ipas.36680

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The main constraint in the extensification of maize on the dry land of acid soil is the low availability of P in soil. This study aimed to determine the effect and the optimal dose of humic acid on the growth and yield of maize on acid soil. This research was conducted from February to May 2017 at Tri Dharma Field Laboratory, Faculty of Agriculture, Gadjah Mada University. Acid soil with low P availability used was from sub-district Cigudeg and Jasinga, West Java. The research was arranged in Randomized Complete Block Design (RCBD) with 2 factors. The first factor was maize cultivar, namely Bisi 2 and Pioneer 35. The second factor was the rate of humic acid and NPK fertilizer, consisting of 0 kg.ha-1 (without) NPK and 0% (without) humic acid, NPK + 0% (without) humic acid, NPK + 5% humic acid, NPK + 10% humic acid, and NPK + 15% humic acid. NPK fertilizer applied was NPK 16:16:16 at a dose of 350 kg.ha-1. The results showed that humic acid application on acid soil increased C-humic content in the soil, soil P availability, total dry weight of the plant, and kernel dry weight at harvest (15 weeks after planting). The increase in soil P availability did not improve the plant growth but increased the accumulation of plant biomass.  The application of humic acid at 15% (52.5 kg.ha-1) combined with NPK fertilizer on acid soil significantly increased total dry weight of plant and kernel dry weight up to 13.14% and 21.81%, respectively, thus, it is recommended for maize cultivation on acid soil. 
Effect of humic acid on the growth and yield of two maize (Zea mays L.) cultivars on andisol Tangguh Prakoso; Endang Sulistyaningsih; Benito Heru Purwanto
Jurnal Ilmu Pertanian Vol 5, No 1 (2020): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (43.008 KB) | DOI: 10.22146/ipas.36935

Abstract

One way to improve maize (Zea mays L.) production is through land extension using Andisol land. However, Andisol soil has phosphate (P) fixation problem due to the high amorphous material. Hence, the use of organic material in the form of humic acid that has greater affinity to amorphous minerals is recommended to solve the problem. This research was conducted in February-May 2017 at Tri Dharma field of Faculty of Agriculture, Universitas Gadjah Mada. The Andisol land used has a low available P category from Datar, West Java and Wonosobo, Central Java. This research was arranged in a Randomized Complete Block Design (RCBD), consisting of two factors. The first factor was maize cultivar (Bisi-2 and Pioneer-35). The second factor was the doses of humic acid, consisting of control treatment (without fertilizer and humic acid), NPK without humic acid, and NPK + humic acid at 5%, 10%, and 15%. The percentage of humic acid given, based on the amount of NPK 16:16:16 fertilizer, was 350 kg.ha-1. Fertilization was applied three times 100 kg.ha-1 on 1 WAP, 150 kg.ha-1 at 3 WAP and 100 kg ha-1 at 7 WAP. The results is, humic acid treatment had the same effect with NPK fertilization treatment only and control on P available Andisol soil. Humic acid, also has the same effect with NPK fertilizer treatment in increasing the yield component of 100 seeds weight, dry weight of seeds, harvest index, length of cobs and productivity.
Co-Authors A.A. Ketut Agung Cahyawan W Abdul Syukur Adileksana, Cahyo Amalia Tetrani Sakya Andy Wijanarko Andy Wijanarko Anna Kusumawati Aridinasty Maritasari Arifin Fahmi Arifin Fahmi Arifin Fahmi Arifin Fahmi Fahmi Asih Indah Utami Azwar Ma'as Azwar Maas Azwar Maas Azwar Maas Azwar Maas Azwar Maas Azwar Ma’as Azwar Ma’as Bambang Hendro Sunarminto Bambang Hendro Sunarminto Bambang Hendro Sunarmito BASUKI BASUKI Bayu Dwi Apri Nugroho Bostang Radjagukguk Bostang Radjagukguk Bostang Radjagukguk Bostang Radjagukguk Bostang Radjagukguk Cahyo Wulandari Cahyono Agus Christoporus Sudradjat Widiarso Dian Syafitri Ompusunggu Didik Indradewa Didik Indradewa Dina Wahyu Trisnawati Djaka Marwasta Eka Tarwaca Susila Putra Eka Tarwaca Susilaputra Eko Hanudin Eko Hanudin Eko Hanudin Eko Hanudin Eko Hanudin Eko Hanudin Hanudin Endang Sri Dewi HS Endang Sulistyaningsih Eni Maftu’ah Eni Maftu’ah Eny Faridah Erni R, - Heri Wibowo Husen, Edi Imas Masithoh Devangsari, Imas Masithoh Indradewa, Didik Kartikawati, Retno Keitaro Tawaraya Krishna Aji Kusumawardani, Patria Novita Lilian Rizkie Maas, Azwar Maftukhah, Rizki Makruf Nurudin Makruf Nurudin Margi Asih Maimunah Miranti Dian Pertiwi Mulyono Nitisapto MULYONO, NITISAPTO Nugroho Susetya Putra Nugroho Susetya Putra Nur Indah Mansyur Pradysta Maya Hermania Prapto Yudono Prapto Yudono Prapto Yudono Putra, Nugroho Susetya Putri Wulandari Putu Oki Bimantara Putu Sudira Putu Sudira Putu Sudira R. Sapto Hendri Boedi Soesatyo Retno Kartikawati Riza Kurnia Sabri Rudi Hari Murti Samuel Munyaka Kimani Santika Sari Shiddieq, Dja’far SIGIT SUPADMO ARIF Sri Hartati Sri Nuryani Hidayah Utami Sri Nuryani Hidayah Utami Sri Nuryani Hidayah Utami Sri Nuryani Hidayah Utami Sri Nuryani Hidayah Utami Sri Nuryani Hidayah Utami Sri Nuryani Hidayah Utami Sri Nuryani Hidayah Utami Sri Nuryani Hidayah Utami, Sri Nuryani Hidayah Sri Redjeki Stephen Harper Suci Handayani Sukristiyonubowo, Sukristiyonubowo Supriyanto Notohadisuwarno Tangguh Prakoso Totok Gunawan Tri Mulya Hartati Valensi Kautsar Vira Kusuma Dewi Weiguo Cheng Weiguo Cheng, Weiguo Wijanarko, Andy Wiji Safitri Wijoyo, Rachmanto Bambang Wiratama, Ristiya Adi Yoga Yuniadi Yuli Lestari