Abstract
Accurate information on the extent and spatial location of degraded lands is very important to plan their rehabilitation. So far, various institutions issue different estimation on the extent of degraded land in Indonesia led to big confusion for rehabilitation planning. Ministry of Forestry estimates around 30.2 million ha of degraded land both inside and outside forestry area throughout Indonesia based on data released in 2007. Ministry of Forestry implementes the so called scoring method in delineating degraded land. Criteria used in the scoring methods are: land cover, slope steepness, erosion, and management. Scoring method applies different weight to each of those criteria. This study aimed to analyze accuracy of scoring method and to compare it to propose alternative methods in delineating degraded land such as: a) Inconsistency of land use, and b) Combination of Inconsistency of land use and scoring method. The accuracy of these methods were obtained by comparing to the field observation. The slope map was derived from SRTM 30 m, soil map was obtained from Soil Research Institute and land cover/land use from Ministry for Environment. Using GIS analysis, those maps were used to compose land capability classification (LCC) and inconsistency of land use. The study showed that scoring method had 66% accuracy in delineating degraded land. When scoring method was combined with Inconsistency method the accuracy increased about 7%.Keywords: Degraded land; inconsistency of land use; land capability class; scoring method[How to Cite: Tarigan SD. 2012. Methods for Delineating Degraded Land at Citarum Watershed, West Java, Indonesia. J Trop Soils, 17 (3): 267-274. doi: 10.5400/jts.2012.17.3.267][Permalink/DOI: www.dx.doi.org/10.5400/jts.2012.17.3.267]
Highlights
Microalgae are marine organisms which are known as phytoplankton
The samples were grouped into 3, i.e. biakan 1 (B1) was derived from rice cultivation area, biakan 2 (B2) was derived from land that was not cultivated with rice, and biakan 3 (B3) was derived from swamp water samples
Three species of Cyanophyceae class and 2 species of Chlorophyceae class of microalgae were identified in the swampland
Summary
Microalgae are marine organisms which are known as phytoplankton. Cyanophyta Division is the only microalgae that can fix nitrogen so they often being used in agriculture as biofertilizer. According to Fadilah and Ariesyadi (2013) microalgae can. J Trop Soils, Vol 23, No 3, 2018: 125-131 ISSN 0852-257X ; E-ISSN 2086-6682 cause some nutrients in water to dissolve and the nutrients will be taken up by microalgae. Microalgae are considered to be potential as a contributor of nitrogen. Microalgae can grow well in swamp areas because the swamplands provide nutrients which are needed by microalgae to live without disturbing the plants that grow in the same area. Swamplands in Indonesia are quite wide, i.e. around 33.4 - 39.4 millions ha, which spread predominantly in Sumatra, Kalimantan, Sulawesi and Papua (Djaenudin 2009)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
