[1] Tamoghna Ojha, Sudip Misra, Narendra, “WSN for agriculture: state of the art in practice and future challenges,” J. Comput. Electron. Agric., 2015, 66–84.
[2] E. Ben-Dor, A. Banin, “Near infrared analysis as a rapid method to simultaneously evaluate several soil properties,” Soil Sci. Soc. Am. J. 1993, 364–372.
[3] W. Van Lierop, “Determination of available phosphorus in acid and calcerous soils with the Kelowna multiple-element extractant,” Soil Sci., 1988, 284–291.
[4] A.B. Ghosh, J.C. Bajaj, R. Hasan, Dhyan Singh, “Soil and Water Testing Methods: A Laboratory Manual,” Division of Soil Science and Agricultural Chemistry, IARA, New Delhi, 1983.
[5] Aldillah, Rizma, Harianto Harianto, and Heny Kuswanti Suwarsinah Daryanto. “Analisis Simulasi Kebijakan untuk Meningkatkan Produksi Kedelai Nasional,” Jurnal Agribisnis Indonesia (Journal of Indonesian Agribusiness) 2.1 (2014): 33-62.
[6] Badan Pusat Statistik, Produksi Padi, Jagung, Kedelai (Angka Ramalan III tahun 2010). Berita Resmi Statistik No. 68/II/Th. XIII, 1 November 2010.
[7] Departemen Pertanian, Mutu Kedelai Nasional Lebih Baik dari Kedelai Impor [Siaran Pers], Jakarta: Badan Litbang Pertanian, 2008.
[8] Azni IN. Formulasi Bahan Makanan Campuran Berbahan Dasar Kedelai, Beras Merah, Dan Pisang Kepok Untuk Makanan Pendamping-Asi. Jurnal Teknologi Pangan dan Kesehatan, Journal of Food Technology And Health, 2019, May 27,1(1):1-7.
[9] A.B. Ghosh, R. Hasan, “Nitrogen fertility status of soils of India,” Fertilizer News 25 (11), 1980.
[10] P. Guillemin, F. Berens, M. Carugi, M. Arndt, L. Ladid, G. Percivall, B. De Lathouwer, S. Liang, A. Bröring, P. Thubert, “Internet of Things Standardisation—Status, Requirements, Initiatives and Organisations,” RIVER PUBLISHERS SERIES IN COMMUNICATIONS, 2013, p.259.
[11] E.D. Widianto, D. Eridani, R.D. Augustinus, M.S. Pakpahan, “Simple LoRa Protocol: Protokol Komunikasi LoRa Untuk Sistem Pemantauan Multisensor,” TELKA-Telekomunikasi, Elektronika, Komputasi dan Kontrol. 2019, Nov 27, 5(2):83-92.
[12] P. Rekha, V.P. Rangan, M.V. Ramesh, K.V. Nibi, “High yield groundnut agronomy: An IoT based precision farming framework,” in IEEE Global Humanitarian Technology Conference (GHTC), 2017, October. (pp. 1-5).
[13] G. Lavanya, C. Rani, P. Ganeshkumar, “An automated low cost IoT based Fertilizer Intimation System for smart agriculture,” Sustainable Computing: Informatics and Systems, 2020, 28, p.100300.
[14] D. Perdana, L. Renaldi, I. Alinursafa, “Performance Analysis of Soil Moisture Monitoring based on Internet of Things with LoRA Communications,” Journal of Southwest Jiaotong University, 2020, 55(5).
[15] D. Perdana, M. Imadudin, G. Bisono, “Performance Evaluation of Soil Substance Measurement System in Garlic Plant based on Internet of Things with Mesh Topology Network Scenario,” International Journal of Communication Networks and Information Security, 2019, 11(3), pp.417-423.
[16] F. Siva, “Smart fertilizer recommendation through NPK analysis using Artificial Neural Networks,” Doctoral dissertation, Strathmore University, 2019.
[17] A.F. Rachmani, F.Y. Zulkifli,. “Design of iot monitoring system based on lora technology for starfruit plantation,” in TENCON 2018-2018 IEEE Region 10 Conference 2018, October, pp. 1241-1245.
[18] N. Cameron, “Radio frequency communication,” in Electronics Projects with the ESP8266 and ESP32, Apress, Berkeley, CA, pp. 399-436.
[19] Datasheet and Instruction of NPK Sensor.2012. [online]. http://www.lusterleaf.com/img/instruction/1865_instruction.pdf.
[20] G.M. Drown, P. Lu, inventors; Intel Corp, assignee. Integrated circuits for generating input/output latency performance metrics using real-time clock (RTC) read measurement module. United States patent US 10,853,283. 2020 Dec 1.
[21] T. Meirina, S. Darmanti, S. Haryanti, “Produktivitas kedelai (Glycine max (L.) Merril var. Lokon) yang diperlakukan dengan pupuk organik cair lengkap pada dosis dan waktu pemupukan yang berbeda,” Anatomi Fisiologi, 2009, 17(2), pp.22-32.
[22] A.G. Manshuri, N. Pemupukan, “P dan K pada kedelai sesuai kebutuhan tanaman dan daya dukung lahan,” J Penelitian Pertanian Tanaman pangan, 2010, 29(3), pp.171-179.
[23] J. Rubio-Aparicio, F. Cerdan-Cartagena, J Suardiaz-Muro, J. Ybarra-Moreno, “Design and implementation of a mixed IoT LPWAN network architecture,” Sensors, 2019, 19(3), p.675.
[24] A. Dash, S. Pal, C. Hegde, “Ransomware Auto-Detection in IoT Devices using Machine Learning,” no. December, 2018, pp.0-10.
[25] A.F. Rachmani, F.Y. Zulkifli, “Design of iot monitoring system based on lora technology for starfruit plantation,” in TENCON 2018-2018 IEEE Region 10 Conference, 2018, October, pp. 1241-1245.
[26] E.D. Widianto, M.S. Pakpahan, R. Septiana, “LoRa QoS Performance Analysis on Various Spreading Factor in Indonesia,” in 2018 International Symposium on Electronics and Smart Devices (ISESD) 2018, October, pp. 1-5.
[27] L. M. Aversa Villela, “Analisis Parameter Lora Pada Lingkungan Outdoor,” J. Chem. Inf. Model., 2020, vol. 53, no. 9, pp. 1689–1699.
[28] D. P., S. K. M., and N. C., “Automatic Plant Irrigation using Solar Panel,” Int. J. Web Technol., vol. 5, no. 2, pp. 114–115, 2017, https://doi.org/10.20894/ijwt.104.005.002.00.
[29] Nuryanto, Lilik Eko., “Penerapan Dari OP-AMP (Operational Amplifier),” Orbith: Majalah Ilmiah Pengembangan Rekayasa dan Sosial, 2017, 13.1. [30] Raditya Yoga Asditama, “Prototype of Automatic Fertilization Control System for Soybean Plants Based on the Internet of Things,” 2020.
[31] K.P. Mhatre, U.P. Khot, „Minimizing Delay Using New Dynamic Blocking Expanding Ring Search Technique for Ad hoc Networks,” International Journal of Electronics and Telecommunications, 2020, Nov 22, 66(4):723-8.
[32] K. Kuliński, A. Heyduk, “Frequency response testing of zero-sequence current transformers for mining ground fault protection relays,” International Journal of Electronics and Telecommunications, 2020, Nov 22, 66(4):701-5.
[33] K. Kuczynski, A. Bilski, P. Bilski, J. Szymanski, “Analysis of the magnetoelectric sensor's usability for the energy harvesting,” International Journal of Electronics and Telecommunications, 2020, 66.