Abstract. Afsholnissa S, Hernawan E, Lastini T. 2019. Land cover change and land use suitability analyses of coastal area in Bantul District, Yogyakarta, Indonesia. Biodiversitas 20: 1475-1481. Shrimp farming in the southern coast of Bantul District is considered to be the cause of environmental degradation, decline of mangrove association due to logging for land conversion to shrimp pond and also considered to be the cause of agricultural land for crops around the shrimp pond. The purpose of this study was to identify land use change and analyze the land suitability for shrimp farming, agriculture, and mangrove plant associations. Identification of land use was done using ENVI 5.3. The study identified 34.88 ha (3.16%) empty ponds, 20.97 ha (1.90%) active ponds and as much as 91.93 ha (8.31%) land used for agriculture. The identification of land use change using Google Timelapse revealed a dominant land conversion of sandy soil and mangrove plant area into shrimp ponds in 2007 and continue to increase from 2011 to 2015. Land suitability was evaluated using ArcGIS 10.5 with an overlay method. The results revealed that 634.82 ha area of the land was suitable for shrimp ponds and ​​84.32 ha area were suitable for non-paddy agriculture. Lands suitable for paddy field were about 148.58 ha, and that for mangrove plant association was 616.42 ha. Spatially, coastal area of ​​Bantul District was dominantly suitable for shrimp farming.

Leaves of surian tree (Toona sinensis) based on the research, can be used for medications, such as diabetes, cancer, and others. At the present the people is being switched from chemical drugs to herbal medicines. Therefore, surian leaves is one source of herbal medicine to be developed in the future. However, information of leaves biomass in each tree relating to ages and tree parameters is unknown. This study aims to determine the weight of surian leaves on each tree and to examine the relationship of leaves weight with several tree dparameters. The study was conducted on private forests in Sumedang District. The sample of 110 trees were taken purposively. Tree parameters were measured, namely: Diameter Breast Height (DBH), total height, timber height, crown height, crown diameter, age, and leaves weight of each tree. The results of the correlation analysis showed that there was a significant relationship between four parameters of the tree, namely DBH, total height, crown height, and crown diameter with surian leaves weight. The highest correlation with the weight of surian leaves is DBH, amounting to 0.75. Estimated weight of leaves in DBH 10-19 cm is 8-11 kg/tree. Whereas for DBH above equal to 20 cm is 18-23 kg/tree.

Purpose : The Integrated farming system offers better opportunities to be implemented in smallholder agriculture because it ensures productivity and profitability for sustainable livelihoods. However, the evaluation of this practice has not been clearly identified. This study is aimed at evaluating the ecological, economic, social, institutional, and technological aspects of sustainability of existing dairy-horticulture farming systems at farm level. Research Method : Data were collected through survey design using questionnaire, observation, and literature review. This research used Multidimensional Scaling, leverage analysis and Monte Carlo called RAP-DHFS (Rapid Appraisal for Dairy-Horticulture Farming System) to analyze the data. Findings : The results showed that the sustainability status of ecological dimension, economic dimension, social dimension, and technological dimension were classified as less sustainable which were 28.07%, 29.52%, 27.37%, and 29.15, respectively while the institutional dimension was considered as unsustainable (21.77%). There were also 10 attributes identified as the most influential attributes on the sustainability status. Limitations : The study was conducted at one village, which is a small scope of area. Value : This study provides a holistic assessment of the integrated farming system and shows the concern and risk for further development in rural areas.

No abstract