Impacts of parametric methods on land suitability classification and land management prioritization for porang, Amorphophallus onchophyllus in Indonesia: A comparative study

Document Type : Research Paper


1 Department of Agrotechnology, State University of Gorontalo, Gorontalo, Indonesia

2 Department of Agribusiness, State University of Gorontalo, Gorontalo, Indonesia



Porang is becoming recognized as a strategic commodity due to its high demand and substantial economic value. However, the lack of a standardized set of site-specific land suitability criteria for porang presents challenges in conducting land suitability assessments and planning for its use. Therefore, this study addressed the knowledge gap by evaluating land suitability classes and the implications of land management for porang cultivation, using different parametric methods. A comprehensive survey of 32 land units was conducted, followed by soil analysis in the laboratory. The square root (SRM) and the Rabia and Terribile (RTM) parametric methods were employed for the land suitability assessment. Subsequently, the land management priorities were determined based on the results of the land suitability class analysis derived from both methods. The results showed that land suitability for porang plants with SRM and RTM was dominated by the very suitable class (S1), however, the distribution of S1 was wider with RTM. The remaining classes with SRM consisted of moderately suitable (S2), marginally suitable (S3), currently not suitable (N1), and permanently not suitable (N2), while the remaining classes with RTM only consisted of S1, S2, and S3 classes without class N. The priority of land management for porang plants for both parametric methods is dominated by priority I, however, in SRM there are priorities II, III, and NP (not priority), while in RTM, there are only II and III. Based on land suitability class and land management priority, RTM was still better than SRM.


Abolhasani, F, Kharazian, N & Jalilian, N 2021, Floristic studies, life forms and chorology of Kouh-payeh area in Isfahan province. Caspian Journal of Environmental Sciences, 19: 59-73.
Al-Dulaimy, QZA, Hammad, HS & Al-Tamimi, RA 2022, Effects of planting date and spraying with organic fertilizers on vegetative growth indices of dill plant (Anethum graveolens L). Caspian Journal of Environmental Sciences, 20: 793-798.
Amelia, DE, Wahyuni, S & Harisuseno, D 2021, Compatibility evaluation satellite data as an alternative of evaporation data availability in Wonorejo reservoir. Journal of Water Resource Engineering and Management, 12: 127-138. DOI: 10.21776/ub.pengairan.2021.012.02.05.
Amraei, B 2022, Effects of planting date and plant density on yield and some physiological characteristics of single cross 550 hybrid maize as a second crop. Caspian Journal of Environmental Sciences, 20: 683-691.
Apu, IR, Jawang, UP & Nganji, MU 2022, Analysis of land suitability for the development of porang (Amarphopallus ancophillus) plants in Lewa Sub-regency, East Sumba Regency. Journal of Soil and Water Conservation, 9: 49-55, DOI: 10.21776/ub.jtsl.2022.009.1.6.
Azizi, I & Kurniawan, F 2021, Effect of seed origin, age, and size on glucomannan levels and oxalate levels in porang tuber. Jurnal Sains dan Seni ITS, 9: 2337-3520, DOI: 10.12962/j23373520.v9i2.58571.
Bagherzadeh, A & Gholizadeh, A 2016, Modelling land suitability evaluation for wheat production by parametric and TOPSIS approaches using GIS, northeast of Iran. Modelling Earth Systems and Environment, 2: 1-11, DOI: 10.1007/s40808-016-0177-8.
Banjarnahor, D & Simanjuntak, BH 2016, Evaluation of the suitability of Central Sumba’s land for food crops and the design of site-specific cropping patterns. Bumi Lestari Journal of Environment, 16: 108. DOI: 10.24843/blje. 2016.v16.i02. p04.
Chai, T & Draxler, RR 2014, Root mean square error (RMSE) or mean absolute error (MAE)?: Arguments against avoiding RMSE in the literature. Geoscientific Model Development, 7: 1247-1250, DOI: 10.5194/gmd-7-1247-2014.
Chapman, HD 1965, Cation-exchange capacity. In: AGN, (Ed.), Methods of soil analysis: Part 2, Chemical and microbiological properties. Wiley Online Library, pp. 891-901.
Chen, Y, Yu, J & Khan, S 2010, Spatial sensitivity analysis of multi-criteria weights in GIS-based land suitability evaluation. Environmental Modelling & Software, 25: 1582-1591, DOI: https://doi. org/10.1016/j.envsoft. 2010.06.001.
Demina, GV, Prokhorenko, NB & Kadyrova, LR 2020, The influence of soil quality on the vitality of Trifolium pratense L. cenopopulations in the subzone of deciduous forests of Tatarstan, Russia, Caspian Journal of Environmental Sciences, 18: 411-419.
Dengiz, O, Gol, C, Sarioğlu, FE & Ediş, S 2010, Parametric approach to land evaluation for forest plantation: A methodological study using GIS model Orhan. African Journal of Agricultural Research, 5: 1482–1496. DOI: 10.5897/AJPP10.126.
Elaalem, M 2013, A comparison of parametric and fuzzy multi-criteria methods for evaluating land suitability for olive in Jeffara plain of Libya. APCBEE Procedia, 5: 405-409, DOI: 10.1016/j.apcbee.2013.05.070.
Eviyati, & Sulaeman 2009, Chemical analysis of soil, plants, water and fertilizers. Soil Research Institute, Bogor.
Firdaus, F, Hendri, J & Saidi, BB 2022, Evaluation of land suitability for the development of pepper commodities in East Tanjung Jabung Regency. Jurnal Ilmiah Ilmu Terapan Universitas Jambi, 6: 181-191. DOI: 10.22437/ jiituj.v6i2.22955.
Fitriyanti, Purwadi, SN & Arifin, M 2023, Land suitability in sustainable cultivation practices for porang (Amorphophallus oncophyllus L.) in Pasuruan Regency, Indonesia. Jurnal Ilmiah Pertanian, 20: 163–174. DOI: 10.31849/jip.v20i2.13291.
Gusmalawati, D, Arumingtyas, EL, Azrianingsih, R & Mastuti, R 2022, LC-MS analysis of carbohydrate components in Porang tubers (Amorphophallus muelleri Blume) from the second and the third growth period. IOP Conference Series: Earth and Environmental Science, 391: 012022. DOI: 10.1088/1755-1315/391/1/ 012022.
Indriyani, S, Arisoesilaningsih, E, Waryati, T & Pirnobasuki, H 2011, A model of relationship between climate and soil factors related to oxalate content in porang (Amorphophallus muelleri Blume) corm. Biodiversitas Journal of Biological Diversity,12: 45-51, DOI: 10.13057/biodiv/d120109.
Kau, AS, Gramlich, R & Sewilam, H 2023, Modelling land suitability to evaluate the potential for irrigated agriculture in the Nile region in Sudan. Sustain. Water Resources Management, 9: 1-17, DOI: 10.1007/s40899-022-00773-3.
Khiddir, SM 1986, A statistical approach in the use of parametric systems applied to the FAO framework for land evaluation. DOI: 8540966.
Kjeldahl, J 1883, A new method for the determination of nitrogen in organic matter. Analytical Chemistry, 22: 366–382.
Kusnarta, IGM, Mahrup, M, Padusung, P, I.N. Soemeinaboedhy IN & Fahrudin, F 2021, Study of land biophysical for “porang” (Amorphopallus muelleri) as a conservation aspect in agroforestry system in Lombok Island. Jurnal Sains dan Teknologi, Lingkung. Special Issue: 94-107, DOI: 10.29303/jstl.v0i0.264.
Lufiana, B, Mokoolang, S, Korompot, I, Fahrullah, F & Amin, M 2023, The use porang flour as tapioca flour substitution on physical characteristic and hedonic chicken meatball. Jurnal Peternakan Lokal, 5: 8-15.
Marbun, P, Nasution, Z, Hanum, H & Karim. A 2019, Evaluation of land suitability on arabica coffee plantation by parametric method in Lintongnihuta District. IOP Conference Series: Earth and Environmental Science, 260: 1-6. DOI: 10.1088/1755-1315/260/1/012155.
Mufidah, RA, Pujiasmanto, B, Sulistyo, TD & Supriyono 2021, Substitution of ZA with organic fertilizer on the cultivation of porang (Amorphophallus muelleri Blume). IOP Conference Series: Earth and Environmental Science, 824: 4-11, DOI: 10.1088/1755-1315/824/1/012008.
Nimpuna, DD, Taryana, D & Astuti, IS 2022, Evaluation of land suitability for the development of porang cultivation (Amorphophallus muelleri Blume) in Kare District, Madiun Regency. Jurnal Pendidikan Geografi Undiksha, 8: 38–51. DOI: 10.20527/jpg.v9i1.12726.
Nurdin, N, Zakaria, F, Azis, MA, Rahim, Y, Rahman, R, et al. 2022, Comparison of land suitability class for endemic Coffea liberica Pinogu HP. acquired using different methods and recommendations for land management in Pinogu Plateau, Bone Bolango Regency, Indonesia. Sains Tanah- Journal of Soil Science and Agroclimatology, 19: 42–51.
Nwer, BA, Whaida, AM & Grab, FM 2020, Development of soil suitability ratings index for crops in the north – east of libya using geographic information system. Journal of Misurata University for Agricultural Sciences, 2: 19-29, DOI: 10.36602/jmuas. 2020.v02.01.02.
Olsen, SR, Cole, CV, Watanabe, FS & Dean, LA 1954, Estimation of available phosphorus in soils by extraction with sodium bicarbonate. Circular (939): 1-19.
Pasaribu, RB, Hadi, S & Hutabarat, S 2022, Prospects for the development of porang agribusiness in Pekanbaru City, Indonesia. Journal of Agricultural Economics, 12: 210-219, DOI:
Rabia, AH & Terribile, F 2013, Introducing a new parametric concept for land suitability assessment. International Journal of Environmental Science and Development, 4: 15-19, DOI: 10.7763/ijesd.2013. v4.295.
Raghuvanshi, KK, Agarwal, A, Jain, K & Singh, VB 2021, A time-variant fault detection software reliability model. SN Applied Sciences, 3: 1-10, DOI: 10.1007/s42452-020-04015-z.
Riptanti, EW, Irianto, H & Mujiyo, M 2022, Strategy to improve the sustainability of “porang” (Amorphophallus muelleri Blume) farming in support of the triple export movement policy in Indonesia. Open Agriculture, 7: 566-580, DOI: 10.1515/opag-2022-0121.
Setyo, SA 2021, To increase PAD, the Pohuwato Regency Government will cultivate porang.
Sharma, S & Wadhwa, N 2022, Application of glucomannan. Journal of Pharmacy Research, 21: 1-5, DOI: 10.18579/jopcr/v21i1.glucomannan.
Shik, MH & Solomon, T 2020, Land suitability evaluation for the growth of Chamaecyparis obtusa forest in Gyeongnam Province, South Korea. Agriculture-Fish System, 9: 122-127, DOI: 10.11648/j.aff.20200904.14.
Shiri, ZM & Farbodi, M 2022, Qualitative evaluation of land suitability for olive, potato and cotton cultivation in Tarom in Zanjan. Agri-tech, 42: 102-112, DOI: 10.22146/agritech.58222.
Siswanto, B & Karamina, H 2016, Porang plant land requirements (Amarphopallus Ancophillus). Buana Sains, 16: 57-70, DOI:
Soedarjo, M, Baliadi, Y & Djufry, F 2020, Growth response of porang (Amorphophallus muelleri Blume) grown with different sizes of bulbils on saline soil. International Journal of Agricultural Science and Research, 6: 8–16. DOI: 10.20431/2454-6224.0604002.
Sulieman, MM, Ibrahim, IS & Elfaki, J 2018, Land suitability characterization for crop and fruit production of some river Nile terraces, Khartoum North, Sudan. International Journal of Scientific and Research Publications, 5: 1–5. DOI: 10.29322.
Utami, NMAW 2021, Economic prospects for the development of porang plants during the Covid-19 pandemic. Viabel, 15: 72-82, DOI:
Walkley, A & Black, IA 1934, An examination of the Degtjareff method for determining soil organic matter, and a proposed modification of the chromic acid titration method. Soil Science. 37: 29–38.
Yanuriati, A, Marseno, DW, Rochmadi, & Harmayani, E 2017, Characteristics of glucomannan isolated from fresh tuber of Porang (Amorphophallus muelleri Blume). Carbohydrate Polymers, 156: 56-63, DOI: 10.1016/j.carbpol.2016.08.080.
Zainudin, Z Noor, RB & Triantoro, A 2020, Evaluation of land suitability for the development of pepper plant (Piper Nigrum L.) in Loa Janan Sub District Kutai Kartanegara Regency. Journal Agroekoteknologi Tropika Lembab Trop, 3: 6-11, DOI: