MAPPING CONSTRUCTION OF SOIL VARIABILITY WITHIN THE LANDSCAPE

M. Edi Armanto

Abstrak


The research aimed to construct mapping soil variability within the landscape.
The research was located in Central Lampung (308 ha). The survey type was
detailed using topographic maps (scales of 1:5,000) and the aerial photo
interpretations. The soil samples were performed by soil pits and borings for
whole survey area (1 composite sample/ha), classified and analyzed. The
balancing methods used transect diagrams, delineated soil bodies and area point
statistics. The research resulted that the aerial photo interpretation was a very
useful method to delineate soil units on the map. A combination of aerial
imagery, topographical maps and field observations provide the most effective
approach for soil mapping in complex landscapes with simple soil patterns.
Although the soil sampling was carried out relatively systematic according to
relief form and the driving lanes of tractors, there was some agreement between
point statistics and map data. The difference between both methods was
maximally 3 %. The result combination from both methods shows that 60 % of
the landscape was classified as eroded, 35 % as normal and 5 % as colluviated.
There was no balance of erosion and onsite sedimentation.
Keywords : Construction, landscape, mapping, soil variability


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