Critical land occured as a result of land cover changes from vegetated into non vegetated land or the composition of the vegetation has changed. This study aimed to analyze the distribution of land critical at KPHP Unit XII Batanghari. Critical land analysis was based on the Perdirjen PDASHL Number P.3/PDASHL/SET/KUM.1/7/2018. Land is classified into 5 levels of criticality, namely: non-critical, critical potential, somewhat critical, critical and very critical. The parameters used in determining the level of criticality of the land are: land cover, erosion-prone class, slope class and the presence of land inside or outside the forest function. Spatial analysis used by Geographic Information System (GIS) and remote sensing technology. GIS is able to analyze and represent geographic phenomenon. Landsat 8 imagery was analyzed to obtain land cover clasification. The results of the analysis showed that critical land level of KPHP Unit XI Batanghari consisted of 3,609 ha (4.45%) that classified as very critical and 3,599 ha (4,43%) as critical land. Then, land with a somewhat critical level had the largest area, namely 26,024 ha or 32.07% of the total area of KPHP Unit XII Batanghari. The landcover was the main parameter to determine the level of criticality of the land. The openland cover type had the maximum score 60.
Daerah panasbumi Gunung Sumbing terletak di Desa Renah Kemumu, Kecamatan Jangkat, Kabupaten Merangin, Provinsi Jambi pada ketinggian ± 900 mdpl. Keberadaan manifestasi panasbumi di lokasi penelitian diduga belum terpetakan seluruhnya. Untuk mengidentifikasi sebaran manifestasi panasbumi dapat menggunakan Citra Landsat 8 berdasarkan sensor TIRS pada band 10. Akuisisi data geolistrik menggunakan konfigurasi dipole-dipole dilakukan sepanjang manifestasi air panas dan tanah beruap dengan panjang lintasan 750 m dan spasi elektroda 25 m. Penelitian ini bertujuan mendapatkan sebaran manifestasi panasbumi berdasarkan suhu permukaan tanah dari Citra Landsat 8 dan mendeskripsikan lapisan batuan bawah permukaan dalam menganalisis karakteristik hot springs flow berdasarkan metode geolistrik. Suhu permukaan tinggi berkisar 21-30°C berada di bagian baratdaya daerah penelitian. Hasil pengukuran geolistrik menunjukkan fluida hidrotermal dengan resistivitas 5 – 40 Ωm. Hal itu dikarenakan fluida hidrotermal berasosiasi dengan batuan alterasi sehingga bersifat konduktif. Aliran fluida hidrotermal teridentifikasi pada kedalaman 0 m hingga 25 m. Berdasarkan integrasi data geologi, faktor pengontrol adanya manifestasi mata air panas disebabkan oleh segmen Sesar Dikit dan batuan Vulkanik di daerah penelitian.Katakunci: Citra Landsat 8, metode geolistrik, panasbumi, hot springs flow.
Sweet potato is one of starchy tuber crop with high potential as a source carbohydrate for both food and feed. Developing this crop through breeding program requires clear understandings on correlative relationships among plant characters especially when indirect selection scheme is used. This research was aimed to know the correlation among morphological characters on sweet potato accessions originated from Kerinci Regency. The research was initiated by exploration and accession collection in several district regions where sweet potato crops were found. Such collected accession was planted in a randomized block design using one row plot with two replications. Characters observed were several morphological characters referring to plant descriptor issued by Center for Plant Variety Protection. Data were analyzed using descriptive statistics (diversity index) and a non-parametric correlation analysis (Spearman-rho). Results showed that several morphological characters were intercorrelated each other both positively and negatively. This meant such characters could be used as a secondary trait in selecting potential genotypes for specific purposes through indirect selection scheme of breeding.
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