Gayo Lues District is known as Citronella and Arabica coffee producer in Aceh province, Indonesia. This paper aims to manage Citronella and Arabica coffee's land arrangement in the Gayo Lues District's cultivated area.  This implementation is aimed at maintaining the peculiarities of citronella products and Arabica coffee. Thus, the two commodities must be separated in terms of allocated sites.  The altitude for the area is 200-2,000 meters above sea level, consisting of ten classes, and the type of soils are Entisols, Oxisols, Inceptisols, and Ultisols. The area's slope between 0- to 40% (4 classes) was used to delineate the land units. There are 49 land units observed within the cultivated area of 160,017.17 ha.  The guidelines for land suitability classification by the Ministry of Agriculture for Citronella and Center for Coffee and Cocoa Research, Jember for Arabica coffee were utilized.   The results showed that 58,275.5 hectares of land were suitable for citronella, and 13,765.75 ha has been planted. The actual land suitability of citronella inside the area of 58,275.5 ha is suitable (S2 class) and marginally suitable (S3-class) and not suitable (N-class) with limiting factors are temperature, water availability, erosion hazard, and nutrient retention.  This land suitability can be improved by providing inputs to increase the level of suitability with temperature, water availability, and erosion hazard (slope) limiting factors. Also, 48,765.3 hectares can be developed for Arabica coffee, and 4,653.5 ha has been planted.  The actual land suitability for Arabica coffee is Suitable, Marginal Suitable, and Not Suitable, limiting the soil's physical properties (adequate soil depth), slope, and chemical properties of the soil.  Once repaired, the land's suitability becomes Suitable (S1-class) (without limiting factor), Suitable, and marginal suitable with the slope as a limiting factor. There is an area of 44,509.75 hectares of land at 200-1,400 m above sea level within the cultivation area developed with a Citronella. There is an area of 44,111.8 ha at the height of 800-2,000 m above sea level, potentially for  Arabica coffee.

Soil organic matter is an indicator of soil fertility. The purpose of this study was to analyse various forms of soil organic carbon in citronella plantation, citronella plantation under pine tree, and soil under pine tree. Soil organic carbon in various forms was analysed from soil samples taken from each horizon and soil profile. The soil profiles observed were ultisol profiles planted with citronella, citronella under pine tree, and under pine tree, and slopes; 0-8%, 8-15%, 15 -25%, and 25-40%, in order to obtain 12 soil profiles with a total of 39 soil samples. Ultisols planted with citronella had higher soil organic carbon than ultisols planted with citronella under pine tree and ultisols under pine trees. Based on the slope, the highest soil organic carbon was obtained in the soil with a slope of 0-8%, and decreased with increasing slope. Based on soil depth, the highest soil organic carbon was obtained in the upper horizon, compared to the horizon below. The highest total soil organic carbon was obtained at the soil surface horizon with a slope of 0-8% and citronella was planted. This pattern of total soil organic carbon is similar to that of sesquioxide bound organic carbon, but is not consistent with that of free clay bound organic carbon.

Coastal zones are areas that are vulnerable to ecological damage. One type of ecosystem that is vulnerable to damage in coastal zones is mangroves. The coastal area of East Aceh is one of the areas where the existence of mangrove ecosystems has a high level of criticality. The level of criticality of mangroves in the area is caused by various factors such as exploitation of natural resources, physical development such as residential areas, and conversion of land to other designation areas without considering to the sustainability of mangrove ecosystems. By utilization of Landsat 8 and Bing Map Imagery satellite image data using the concept of geographic information systems, the extent of mangrove forest and its critical level can be inventoried. Determination of the critical level of mangrove forests was carried out by referring to the mangrove inventory guidelines issued by the Indonesian Ministry of Forestry in 2005. The results of data processing showed that the critical level of mangrove forests reached 4,200.02 hectares in severely damaged conditions, 7,286.93 hectares in damaged condition, and 9.704, 01 hectares are not damaged. Based on these results, forest management efforts are needed through the method of rehabilitating mangrove forests toimprove the condition of heavily damaged mangrove forests.

Aceh Province contributed three percent of Indonesia's paddy production in 2019. This study aims to analyze the farmer's performance and the correlation between income and paddy farmer’s performance. The samples were selected using purposive sampling and data were analyzed using descriptive qualitative and Rank Spearman. The results show the average age of farmers is 46 years old, with 20 years experience in average, and the majority are high school graduates. Meanwhile, the average income of the farmers is IDR 15,464,017/ha, with and the average land managed of 0.7 hectares, the average production of 6.5 ton/ha, the average labor use of 32 days. The farmers use the following fertilizers: 125.74 - 216.85 kg/ha urea, 33.71 - 161.61 kg/ha SP-36, 5.62 - 41.99 kg/ha KCl, 19.43 - 70.72 kg/ha ZA, 20.22 - 222.96 kg / ha NPK, 13.69 kg/ha TSP, 7.30 kg/ha NPK Mutiara and 0.82 - 667.57 kg/ha organic fertilizer. In the Central region, female labors strongly dominate the planting, weeding, and harvesting activities. In the north and west region, women are actively planting and harvesting using conventional systems. The Spearman rank analysis shows that the correlations between income and production of 0.930, land tenure of 0.840, the cost of using fertilizer of 0.283, and the cost of using labor of 0.197.

Land cover/land-use change in Aceh Jaya Regency is greatly affected by the community and local government's increasing activities on land. The continuing development may create a problem due to progressing land use and geomorphic changes along the coastal area since the 2004 tsunami. To examine the land cover/land use and the extent of the geomorphic change to the coastline of Aceh Jaya Regency, a detailed study on the historical shoreline positions and land cover/land-use change was carried out. This preliminary study tried to analyze land use/land cover and geomorphic change from 2004 until 2019 along the coastal area of Aceh Jaya in Aceh, Indonesia, by utilizing multi-temporal and multi-image data. Results show that land use/land cover has considerably changed, primarily to vegetation, open land, and a water body that varied in total area during the year of observation. Coastline changed markedly since 2004 with abrasion reaching up to 436.38 meters from the original coastline, and the loss of land area up to 457.90 hectares, and 5.78 hectares of accretion was added. The longest distance of land that has disappeared from the original shoreline was recorded 436.38 meters from the mainland.