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Judul: Respons Variasi Spasial, Spektral Dan Temporal Dari Vegetasi dan Tanah Terhadap Nilai Beberapa Indeks Vegetasi
Penulis: F. Puturuhu  || email:
Jurnal: Budidaya Pertanian Vol. 4 no. 1 - hal. 21-28 Tahun 2008  [ Pertanian ]
Keywords:  Spatial, spectral, temporal, vegetation indices
Abstract: One benefit of the applications of remote sensing image which is very good is for the estimation of crop biomass above the surface of soil and crop from various scales of geography. Gyration of space of area, daily time coverage, and low expense factors enable one to estimate biomass annually and seasonally. The purposes of this article are: firstly, for checking the information contained in the brightness and wetness indices in relevant with characteristic of the soil and various canopy gratuity. Secondly, for evaluating effects of various spectral resolutions from dampness and soil texture to Green Vegetation Index (GVI) and Normalized Difference Vegetation Index (NDVI) for target on the amount of special vegetations and various characteristics of soil. Thirdly, for better comprehension of the parameter of the surface of soil influencing Microwave Polarization Difference Index (MPDI), and for determining various spatial, spectral and seasonal (temporal) responses to values of MPDI-NDVI from areas which are cultivated intensively. Wetness and brightness are estimated by using index of brightness of Tasseled Cap (BI) and make an index of wetness (WI). Model with two simple components from the reflectance of green vegetation and soil is applied for simulation effects of three soil texture type (sand, silt and clay) and two classes of dampness of the soil to estimate wetness, greenness and brightness values. Research results indicate that for the same vegetation gratuity (cover vegetations) class, target with wetter soil show higher value of NDVI level than target with drier soil. On the contrary, the GVI is less influenced by various characteristics of soil. MPDI for areas which are cultivated intensively shows dampness and information on vegetation status from surface of soil.Time series analysis indicates that MPDI vary more during the early stage of planting season, on the contrary NDVI vary more during the end phase of planting season.
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