The limiting factor of land suitability for development of gambir cultivation (case-study in Sari Laba Jahe Village Deli Serdang North-Sumatra)

Abstract

Gambir-(Uncaria - gambir) -is commonly found in North Sumatera, especially in Pak-pak Bharat and Dairi Regency. This-study-aimed to determine the limiting factors for-gambir cultivation land suitability in Sari Laba Jahe Village, Sibiru-biru Sub-district, Deli Serdang Regency, North-Sumatera-Province. This study was-conducted from January 2020 to June 2020. Soil sampling based on land-unit was carried-out through a field survey to determine soil characteristics in the-study location. The land-suitability was evaluated-based on the matching method-between data from laboratory analysis and available gambir-land-suitability criteria. The results-showed that the actual-land suitability-class for-gambir in Sari-Laba Jahe-Village is marginally-suitable-(S3) with temperature limiting factor (tc) and root zone media (rc) of 65.39% in land-units-I,-III,-VI, XI and-marginally-suitable (S3) with a temperature (tc) factor of 34.61% in land-units-II,-IV,-V,-VI,-VII,-VIII,-IX,-X. The limiting-factor of temperature-(tc) and-root zone-media-(rc) were difficult limiting factors to overcome so, that the potential, land suitability-for-gambir in Sari-Laba-Jahe Village is the-same-as the actual-land-suitability.

The potential for the cultivation of Styrax benzoin based on land suitability evaluation in Pakpak Bharat District, Indonesia

“…A land suitability assessment was performed, and the land was categorized into different suitability classes. The criteria for determining the suitability of growing S. benzoin were based on prior research findings, which are compiled and presented in a table (the land suitability characteristics of S. benzoin were derived from the "Valuable Sap of S. benzoin Booklet" published by the Ministry of Forestry, Forestry Research, and Development Agency, Aek Nauli Forestry Research Institute, Simalungun District, North Sumatra (Jayusman 2014;Silalahi and Sunandar 2017;Rahmawaty et al 2021aRahmawaty et al , 2023a (Tabel 1). Based on land evaluation process results, four distinct land suitability classes are established: highly suitable (S1), moderately suitable (S2), marginally suitable (S3), and not suitable (N).…”

“…in Humbang Hasundutan (Rahmawaty et al 2023a). Research conducted by Rahmawaty et al (2021b;2023a) regarding kemenyan and research conducted by et Rauf et al (2015); Rahmawaty et al (2021a;2023b) regarding gambir has indicated that kemenyan and gambir share similar land characteristics across various parameters. These criteria include factors, such as: temperature (tc), water availability (wa), root media (rc), nutrient retention (nr), and the erosion hazard (eh).…”

“…The sap from S. benzoin plays a significant role in the local economy and contributes to the export industry, particularly in the cosmetic and perfume sectors (Pasaribu et al 2013). Additionally, it is considered a key agricultural commodity in Pakpak Bharat District (Rahmawaty et al 2021a).…”

Extrapolation suitability index for sustainable vegetable cultivation in Babati district, Tanzania

“…Most studies on mapping the suitability of vegetables primarily utilized the top-down multi-criteria decision-making approaches that are subject to expert opinions (e.g., Widiatmaka, 2016;Rahmawaty et al, 2020Rahmawaty et al, , 2021Mugiyo et al, 2021;Zakaria et al, 2022). In these studies, the geospatial layers were first classified into suitability groups based on literature or expert knowledge.…”

“…Mostafiz et al (2021) applied a fuzzy membership method to map suitability of vegetables between different seasons in Bangladesh. Other studies had applied a top-down multi-criteria decision making to map suitability of vegetables without on-farm trial data (Mugo et al, 2016;Mostafiz et al, 2021;Rahmawaty et al, 2021;Yuniarti et al, 2022;Zakaria et al, 2022). Although multiple agencies in Tanzania promote sustainable vegetable farming at scale, detailed maps on the suitability of improved cultivars and related improved agronomic practices are lacking.…”