Pinus (Pinus merkusii) is commonly found in North Sumatra Forest. Community of Telagah Village, Sei Binge Sub District, Langkat, North Sumatera, generally manage the land with agroforestry system. Pinus is the one of agroforestry constituent in the community land in Telagah Village. This study aimed to analyse the suitability of the land for pinus in Telagah Village Sei Bingai Sub District, Langkat District, North Sumatra, Indonesia. This research was conducted on May to September 2018. The survey method was conducted to collect soil samples in the field. Spasial analysis for pinus land suitability was evaluated based on the matching method. The reference and criteria were adopted from the Land Suitability for Agricultural Plants by the Centre for Soil and Agroclimate Research, Bogor-Indonesia. The Geographic Information System (GIS) was used to map the actual and potential land suitability in Telagah Village. The results showed that the actual land suitability classes for pinus in this area were moderately suitable (S2) (97.26%) and marginal suitable (S3) (2.74%). The potential land suitability classes for pinus in this area were Suitable (S1) (52.04), moderately suitable (S2) (46.04%) and marginal suitable (S3) (1.92%) in Telagah Village. The temperature (tc) and erosion hazard (eh) were the dominant of limiting factor in this area.

The suitability land of oil palm in North Sumatra Province is important, especially in the lands that are often planted by the community. This study aimed to map the actual and potential suitability of the land for oil palm in Sei Bingai Subdistrict, Langkat, North Sumatra, Indonesia under the different land unit. This research was conducted from March to June 2018. The survey method was conducted to collect soil samples in the field. Land suitability classification (LSC) was evaluated based on the matching method. The Geographic Information System (SIG) was used to map the land suitability classes. The results showed that the land suitability classes for oil palm were marginally suitable (S3) on all land unit. There were no suitable (S1), moderately suitable (S2), and not suitable (N) classes were found in all land unit. There were several limiting factors in land suitability evaluation in the area, namely: the availability of water, erosion hazard, and root zone medium. The water availability (wa) was the dominant limiting factor in this area.

Abstract. Rahmawaty,  Frastika S, Marpaung RME,  Batubara R,  Rauf A. 2019. Short Communication: Use of Geographic Information System for mapping of Aquilaria malaccensis land suitability in North Sumatra, Indonesia. Biodiversitas 20: 2561-2568.  The Geographic Information System (GIS) can be applicated in the field of forestry and agriculture, such as for mapping as part of land evaluation. The land suitability of Aquilaria malaccensis in the agroforestry land of North Sumatra Province is important.  Commonly, A. malaccensis were planted by the community in Langkat and Deli Serdang District. This study aimed to map the land suitability for A. malaccensis in Telaga Village, Sei Bingai Sub District, Langkat District, Peria-ria Village and Sari Laba Jahe Village, Biru-biru Sub District, Deli Serdang District. A survey method was used to collect soil samples in the field. Land suitability classification (LSC) for A. malaccensis was evaluated based on the matching method.  The results showed that the actual land suitability classes for A. malaccensis in Telaga Village were moderately suitable (S2) and marginally suitable (S3). The actual land suitability classes for A. malaccensis in Peria-ria Village and Sari Laba Jahe Village were moderately suitable (S2), marginally suitable (S3) and not suitable (N). There were several limiting factors in land suitability evaluation in the area, namely: nutrient retention (nr), erosion hazard (eh), and root zone medium (rc).

Abstract. Rahmawaty, Frastika S, Rauf A, Batubara R, Harahap FS. 2020. Land suitability assessment for Lansium domesticum cultivation on agroforestry land using matching method and geographic information system. Biodiversitas 21: 3683-3690. Lansium domesticum is one of the multipurpose tree species (MPTS) and is commonly found on agroforestry lands in Sumatra. This study aimed to evaluate the actual land suitability classes for L. domesticum and to map the potential land suitability for the species using matching method and geographic information system (GIS). The study was conducted in Sei Bingai Sub-district, Langkat District, North Sumatra, Indonesia. A survey was conducted to collect soil samples based on land units. Land unit information was obtained by overlaying soil map, land-use map, and slope map. Land suitability was evaluated based on the matching method and GIS was used to map the distribution of land suitability. The results showed that both the actual and potential land suitability classes based on matching approach for L. domesticum were moderately suitable (S2) which accounted for 88.95% of total land and marginally suitable (S3) which accounted for 11.05%. Availability of water (wa), erosion hazard (eh), root-zone medium (rc), oxygen availability (oa), and nutrient retention (nr) were the dominant limiting factors in this area. The most difficult constraints to manage were root-zone medium and water availability. The results of this study suggest that the development of L. domesticum in Sei Bingai is possible although it requires some land improvements to deal with the limiting factors.

Hevea brasiliensis and Aquilaria malaccensis were planted by the community because of its high economic value. The suitabilty land of Hevea brasiliensis and Aquilaria malaccensis in North Sumatra Province are important, especially in the agroforestry land that are often planted by the community. This study aimed to map the suitability of the land for Hevea brasiliensis and Aquilaria malaccensis in Simpang Kuta Buluh village, Sei Bingai Sub District, Langkat District, North Sumatra, Indonesia. The survey method was conducted to collect soil samples in the field. Land suitability classification (LSC) for Hevea brasiliensis and Aquilaria malaccensis was evaluated based on the matching method. The Geographic Information System (GIS) was used to map the land suitability. The results showed that the actual land suitability classes for Hevea brasiliensis in Simpang Kuta Buluh Village were moderately suitable (S2) (52,91%) and marginal suitable (S3) (47,09 %). The actual land suitability classes for Aquilaria malaccensis in Simpang Kuta Buluh Village also the same with Hevea brasiliensis, namely: S2 and S3. The limiting factors for Hevea brasiliensis namely: temperature (tc) and root zone medium (rc). The limiting factors for Aquilaria malaccensis namely: root zone medium (rc).