35 determine the impact each criteria to the feasibility for land suitability crop farm
in peat land area, the explanation can be seen below.
4.3.1 Geologic Map
Geologic condition of EMRP area in one sheet of map, there is Palangkaraya sheet map. Research area are located between Barito River and
Kapuas River, so the soil condition affected by those rivers. According to compilation data, EMRP area are made of sedimentation rock at age miosen to
pleistosen, and surface sedimentation at holosen age. Geologic formation in research area consist of two type. There are Dahor
formation Tqd and Alluvium Qa. Generally, most of geologic condition in research study are alluvium. Alluvium is free material sedimentation consist of
kerakal, kerikil, sand and clay at holosen age. This condition can be proved from it’s widely, it is approximately 509.856,21 hectares and spread on 4 district,
Palangkaraya City, Kapuas District, Pulang Pisau District and South Barito District. Another ones is Dahor Formation. Dahor formations are formed by
tectonic movements which preceded the old lead Pre-Tertiary rocks and Tertiary uplifted forming Meratus heights. In line with the folding and section sesar old
rock then followed by the deposition of dahor formations. Formation of Dahor estimated at aged Plio Plistosen paralis deposited in the environment. Dahor
Formation rocks consist of soft quartz sandstone and a bit of fine-grained clastic sedimentary rocks, as well as lignite layers, conglomerate, mudstone, and inserts
lignite, kaolin and limonite. In this research area, it has wide approximately 96.770,86 hectares and spread on Kapuas district, South Barito district and Pulang
Pisau district. The rest one, approximately 1.178,97 hectares have no data. Further
more about geologic condition in research area can be seen on Table 4 and Figure 9.
36
Table 4 Land Class Suitability Based on Geologic Factor
No Geologic Condition
Area Ha Class Suitability
1 Alluvium 509.856,21
S1 2
Dahor 96.770,86 N1
3 No data
1.178,97 -
Figure 9. Geologic Map in Research Area
37
4.3.2 Land System Map
Land system is a group of land that have the nature of the elements of a homogeneous field at once is a unit of land for commodity zoning. The system of
land used for the analysis of land suitability for wetland food crops Tanaman Pertanian Lahan Basah, dry land crops Tanaman Pertanian Lahan Kering, and
plantation crops tree crops. As a basic information of the geomorphology of research study, we need
land system map. This map was obtained from land system collected from RePPProT map made by “Balai Besar Sumber Daya Lahan Pertanian”. According
to this landsystem map, we can determine some information related to morphology, slope, rock, soil taxonomi, land texture, and rainfall which can be
used as criteria to classified land suitability. Based on RePPProT map, we can see that the research area are divided into nine landsystem, there are BRH Barah,
GBT Gambut, KHY Kahayan, KJP Kajapah, KLR Klaru, MDW Mendawai, PMG Paminggir, PTG Putting, dan SBG Sebangau. For more
detail, can be seen on Table 5, and Figure 10.
Based on landsystem table, some information related to landsystem are morphology, slope, rock, soil taxonomi, land texture, and rainfall.
38
Figure 10. Landsystem Map in Research Area
39
Table 5 Suitability Class Based on Land System in Research Area
No Land
System Description
Area Ha A
B D
1. BRH
Barah Land Morphology : mix sand closed by shallow peat
Slope 2 , relief 2 m Rock : Peat, Old sand sedimentation
Soil Taxonomy : Placaquods, Tropopsamments, Tropohemists Land Texture : peat, rather harsh
Rainfall : 2.700-6.500 mmyear 12587,99
96960,47 -
2. GBT
Gambut Land Morphology : Peat swamp area which is drainage
periodically in aluvial marine land Slope 2 , relief 2 m
Rock : Peat, new delicate alluvium Soil Taxonomy : Tropohemists, tropofibrists, troposaprists,
tropaquents Land Texture : delicate
Rainfall: 2.700-6.500 mmyear 128.881,13
- 20.022,74
3. KHY
Kahayan Morphology : MarineRiver land
Slope 2 , relief 2 m Rock : new marine sedimentation salty, new peat
sedimentation Soil Taxonomy : Tropaquepts, Fluvaquents, Tropohemists
133.791,60 50.879,21
61478,62
40
No Land
System Description
Area Ha A
B D
Land Texture : peat, delicate Rainfall: 2.000-3.600 mmyear
4. KJP
Kajapah Morphology : mangrove forest in tidal area
Slope : 2, relief 2 m Rock : Peat, new alluvium
Soil Taxonomy : Sulfaquents, sulfaquepts, sulfihemists Land Texture : delicate, peat
Rainfall: 1.400-6.500 mmyear -
- 2.723,71
5. KLR
Klaru Morphology : Flood area that always drainage
Slope 2 , relief 2 m Rock : River Sedimentation
Soil Taxonomy : Fluvaquents, Tropaquents, Tropohemists Land Texture : peat, delicate
Rainfall: 2.100-4.100 mmyear 2430,43
- 1355,10
6. MDW
Mendawai Morphology : Shallow peatland
Slope 2 , relief 2 m Rock : Peat
Soil Taxonomy : Tropohemists, Troposaprists, Tropaquents Land Texture : peat, delicate
Rainfall: 2.000-4.000 mmyear 31.849,07
- 50676,01
41
No Land
System Description
Area Ha A
B D
7. PMG
Paminggir Morphology : Basin Peat
Slope 2 , relief 2 m Rock : River sedimentation
Soil Taxonomy : Fluvaquents, Tropaquepts Land Texture : delicate
Rainfall: 2.200-4.000 mmyear 598,47
- -
8. PTG
Puting Morphology : Beetween coastal area
Slope 2 , relief 2 m Rock : Marine sedimentation
Soil Taxonomy : Psammaquents, Tropaquents, Tropopsamments
Land Texture : delicate, harsh Rainfall: 1.400-4.000 mmyear
- -
3545,7
9. SBG
Sebangau Morphology : Big river area with wide canal
Slope 2 , relief 2 m Rock : Aluvium, come from river sedimentation
Soil Taxonomy : Psammaquents, Tropaquents, Land Texture : delicate, moderate
Rainfall: 2.000-2.800 mmyear -
2878,85 -
Source : RePPProT Map Year 1988 Scale 1:250.000
42
4.3.3 Soil Acidity pH
