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Journal : Journal of Tropical Soils

Determination of Site-specific NPK Fertilizer Rates for Rice Grown on Tidal Lowland Aksani, Dila; Budianta, Dedik; Hermawan, Agus
JOURNAL OF TROPICAL SOILS Vol. 23 No. 1: January 2018
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2018.v23i1.19-25

Abstract

This research aimed to determine site specific NPK fertilizer rates combined with rice straw compost application for rice grown on the tidal lowland. This research was conducted in a greenhouse in Indralaya, Ogan Ilir, South Sumatera in February  until September 2017 using a factorial completely randomized design with two factors and three replications. The first factor was NPK fertilizer rate calculated based on the results of soil chemical analysis, consisting of five levels, namely 50% (D1), 75% (D2), 100% (D3), 125% (D4) and 150% (D5) of the site-specific fertilizer rate. The second factor was rice straw compost rate consisting of two levels, namely 5 Mg ha-1 (J1) and 10 Mg ha-1 (J2). The results showed that the application of 150% NPK rate and 10 Mg ha-1 rice straw compost resulted in the best effects on the rice growth grown on the tidal lowland. The application of those fertilizer doses produced the highest maximum number of tillers and productive tillers. In this regard the doses of NPK fertilizers that should be applied are 315 kg urea ha-1, 135 kg SP-36 ha-1 and 90 kg KCl ha-1. 
Physical Properties of Briquette Fertilizers Made from Urea and Fly Ash-Azolla Hermawan, Agus; Napoleon, Adipati; Bakri, Bakri
JOURNAL OF TROPICAL SOILS Vol. 23 No. 3: September 2018
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2018.v23i3.143-150

Abstract

Coal fly ash and Azolla biomass are potential materials to be used as raw materials for the manufacture of briquette fertilizers. In this study, the coal fly ash, azolla and urea in various compositions were mixtured to make briquette fertilizers. The study was conducted to evaluate the physical properties of briquette fertilizers, i.e bulk density, compressive strength, porosity, and water holding capacity on various compositions of fly ash-azolla and urea. The research was arranged in a Completely Randomized Design with three replicates. The formulation of briquette fertilizers as treatments was made with the compossition (w/w, dry-weight basis) of (fly ash : azolla) + urea as follows: (40:60)90+10; (40:60)80+20; (40:60)70+30; (50:50)90+10; (50:50)80+20; (50:50)70+30; (60:40)90+10; (60:40)80+20 and (60:40)70+30. The results showed that the variation in composition of coal fly ash-azolla and urea significantly affected the compressive strength, bulk density, water holding capacity and porosity of briquette fertilizers produced. The increase in the proportion of fly ash or the decrease of azolla biomass proportion tends to increase compressive strength and bulk density, and tends to decrease the water holding capacity and porosity of briquette fertilizers produced.
Growth and Yield of Rice Planted in a Tidal Soil Under NPK in situ and Cow Manure Application Budianta, Dedik; Alfredo Lee Panggar Bessy, Jerry; Hermawan, Agus
JOURNAL OF TROPICAL SOILS Vol. 26 No. 2: May 2021
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2021.v26i2.51-62

Abstract

The specific location fertilization or in situ fertilization rate is a dynamic application and management method dynamically adapted to the plant’s need according to location and season related to soil chemical properties and aims to increase farmer profit. This greenhouse experiment aimed to evaluate the NPK fertilizer dose based on in situ soil chemistry of tidal swamp compared to NPK recommendation combined with cow manure from the local farm. These pot experiments were conducted from June to October 2019 in a Greenhouse of Soil Science Department, Faculty of Agriculture, Sriwijaya University, Indralaya, Ogan Ilir of South Sumatra.  This experiment used a factorial completely randomized design with two factors and three replications. The first factor was NPK fertilizer rate consisting of two levels (200 kg ha-1 Urea, 100 kg ha-1 SP-36, and 100 kg ha-1 KCl) from recommended fertilizer, and (102 kg ha-1 Urea, 0 kg ha-1 SP-36, and 66 kg ha-1 KCl) from the in situ soil analysis. The second factor was cow manure with four levels (2, 6, 8, and 10 Mg ha-1). The result showed that recommended NPK combined with 10 Mg ha-1 cow manure was the best for rice production in tidal lowland and produced 2.5 Mg ha-1.  However, this result was not significant compared to NPK specific locations combined with the same rate of cow manure.
Co-Authors Abdul Choliq Abdul Kosim, Cucu Abdul Madjid Ade Setia Pratama Adi Sucipto, Adi Adipati Napoleon Afif Nur Rahmadi, Afif Nur Afifah, Della Abelya Agung Winarno Agustin, Resty Ahmad Saifudin, Ahmad Ahmad Yunani Airiyani, Mey Linda Aisyah Asri Nurrahma Aksani, Dila Alaik Muhammad, Syauqi Alfiana, Sheyla Alif Alfredo Lee Panggar Bessy, Jerry Ambarsari, Indri Amin, Muh. Sirojuddin Andaryanto, Andaryanto Andi Kresna Jaya Andriani, Eka Yessy Andy Chandra Pramana Aprilia, Sherina Eka Ar-Rasyi, Hasna Hamida Alifia Asyiroh, Eva Nur Aulia Ramadhani Awaludin, Nur Ahmad AYU LESTARI Ayuanti, Rafikhein Novia Azizah, Laily Nur Azzahra, Gabrielle Widhan Bagus Satrio, Moh. Nurman Bakhrudin, Bakhrudin Bakri Bakri Bakri Baldan, Najimul Banu , Syahar Basuni, Basuni Budi Eko Soetjipto Buyung Adi Dharma Caecaria, Dhimaz Sectio Cipto Wardoyo D. A, Forita Damayanti, Alfina Damayanti, Vidya Dani, Nofa Istia Frisna Rahma Dayat, Mohammad Dedik Budianta DEWI SAHARA Dewi, Titis Shinta Doni, Adi Setyo Rahmatu Drajat, Drajat Duerasor, Nadia Eko Juni Wahyudi Ellena, Tania Ely Siswanto Endang Komara Ery Tri Djatmika RWW Esvanti, Mirza Fadli, Bori Heria Faisal Muhammad, Faisal Faradila, Fian Arifiona Firda Meisaroh Fitriani, Nur Afika FITRIYAH Forita Dyah Arianti, Forita Dyah Fulgentius Danardana Murwani Gaffar, Muhammad Andriana Gusrio Tendra Halbi Hanif Rani Iswari Haryawan, Beny HASANAH, RAHMATUL Hiqmah, Milatul Huda, Achmad Nuril Huda, Moh Sulhi Ihsan, Abdul Mu’iz Ihsan Iim Wasliman, HM Ikoh, Ai Iksanudin, Moh. Ilham, Rachmad Imanudin, M.S. Ina Najiyah Indri Safitri, Indri Iriantara, Yosal Ismawati, Lilik Ita Athia Juli Yani Karim, Nurfadilah Karomah, Siti Kasfunnuri, M. Asren Khalikussabir, Khalikussabir Khoir, Ilya Saniyatul Khusni'ah, Imroatul Kurnianti, Florensia Dita Dwi Kurniaty, Elly Lailiyah, Faizatul Ludi Wishnu Wardana M. Cholid Mawardi Magvira, Ninin Choridatul Majid, Sulistiya Abd Makaryanawati Malik, Mochammad M. Maqsuda, Janggih Marsi Marsi Martha, Jefry Aulia Mayasaroh, Wingki Megaswarie,, Rosika Novia Momon Sodik Imanuddin Muchamad Rizky Fauzi Mufa'idah, Zanis Nur Muhamad Fitri Muhammad, Wimar Mulyono, Enggal Chairyadi Mulyono, Lia Anggraini Munandar, Asep Nur Imam Mustika, Nilam Sari Muttaqien, Zaenul Nashiroh, Abdillah Agustya Siwi Nasikh Naswan Suharsono Noviawati, Elis Nurani, Aldina Dwi Oktaviani, Rosana Paserena, Karinda Dwi Pertiwi, Miranti D. Pramana, Aditya Pramita, Cindy Pratama, Moch Aziz Prayitno , Muh. Bambang Prayoga, Diding Setiawan Pribadi, Devi Wahyu Prista, Dynda Puji Handayati Puspitasari, Dewi Sinta putri sabella, valma Putri, Erna D. S. Putri, R. Lusi Ariyani Rahman, Fadali Rahman, Iradah Raisa Rahma, Deshinta Ramantyo, Rachmad Nurofiq Renih Hayati Rizkita, Marsya Aulia Rofi’ah, Siti Rohmah, Yaumi Rohman, Muhammad Nizul Ghofur Rohmanulloh, Arif Roidah, Hasna Roziah, Roziah Rusmaji, Rusmaji S Siswanto Sa'diyah, Lailatul Sa'diyah, Lailiyatus Sa.’diyah, Lailiyatus Sa’diyah, Lailiyatus Sabaruddin Sabaruddin Safani, Nabila Putri Sahil, Mawardi Abi Salsabila, Nadhira Ghea Saodih, Cahya Saptono Hadi, Saptono Sarjana Sarjana Sa’diyah, Lailiyatus Selviasari, Rike Seno Basuki Setiawan, Usep Setyawati, Ira Shiddiqy, Isymayati Ash Siti Nurul Aidil Fitri, Siti Nurul Soleha Soleha Sopiah, Sopiah Sopiah, Sopiah Sri Utami Sriarianie, Sriarianie Subhan, Ega Saiful Sudarmiatin Sudarsono, Naswan Sugangga, Rayyan Sulton Sholehuddin, Sulton Supriono Supriono Susanti*, Wilda Susilawati, Susilawati Sutomo Sutomo Syarifuddin, Yuda Tan, Emily B. Umagapi, Dara Anindya Putri Umami, Nailariza Utami, Rizki Amalia Wahyu Dede Gustiawan Wanitri, Ratih Indah Warsito Warsito Warsito Wening Patmi Rahayu Wibowo, Nyuherno Aris Widyaningrum, Santi Wisnu Wardhana, Ludi Wulandari, Selvina Junia Yanti, Anita Andri Yati Nurhayati Yaum, Lailil Aflahkul Yermias Duha Yudiarto Perdana Putra, Yudiarto Perdana Yusuf Yusuf Zulvia, Evi