Proceedings - Balai Penelitian Tanah
Proceedings - Balai Penelitian Tanah
Proceedings - Balai Penelitian Tanah
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145<br />
Wahyunto et al.<br />
low fertility), eh (slope/erosion hazard), oa (oxygen availability /poor<br />
drainage), rc (rooting condition), fh (flood hazard/ water inundation),<br />
ps (peaty soil). For example the result of land evaluation is (S)3,nr<br />
means that the land (S)3 is marginally suited due to low nutrient<br />
availability.<br />
Land suitability evaluation resulted in 28 Physiographic Mapping Unit<br />
(PMU) are as follows:<br />
PMU 1 was dominated by recent sand beach and thus is not suitable<br />
(N) for any kinds of crops. The main limiting factors are rooting<br />
condition /loose sand accumulation of tsunami material.<br />
PMU 2, 3, 4, and 5 (complex of recent beach ridge and swale in<br />
marine region) are marginally suitable (S3) for cocoa, coconut and<br />
coffee, rambutan duku, durian, citrus, manggo, peanut, long bean,<br />
sweet potato, cassava and maize. The major limiting factors are low<br />
nutrient availability and rooting condition (sandy texture of sub-soil),<br />
and brackish water.<br />
PMU 6 and 8 (complex of beach ridges and swalle-resent with poor<br />
drainage) both units are not suitable for tree crops, however<br />
moderately suitable for wetland rice. The limiting factors are water<br />
inundation, low nutrient content and sandy texture sub soil.<br />
PMU 9 and 10 (complex of sub recent beach ridge and swale in<br />
marine region) are moderately suitable for coconut, rubber, papaya,<br />
banana, oil palm, rambutan, and citrus, manggo, manggoesten, water<br />
melon, nilam, shallot, red chili, maize, peanut, mustard, egg plant,<br />
sweet potato and cassava. The main limiting factors are low nutrient<br />
content and sandy texture sub soil.<br />
PMU 7 and 14 (sub recent of beach ridges and swalles covered by<br />
shallow peat), both units are marginally suitable for rubber, oil palm,<br />
coconut, rambutan, manggoesten, papaya, banana, peniaple and<br />
paddy. The limiting factors are water inundation, low nutrient and<br />
sandy material of sub soil.<br />
PMU 13 (beach ridges sub recent) is moderately to marginally<br />
suitable for Cacao, coconut, coffee, duku, durian, mango,<br />
manggosten, rambutan, banana, shallot, red chilli, mungbean, long<br />
bean, sweet potato and cassava. The limiting factors are low nutrient,<br />
sandy material of sub-soil, and water availability.<br />
PMU 15 (shallow peat: 0,5 – 1,0 m) this unit is marginally suitable for<br />
rubber, oil palm, coconut, banana, pineaple, egg plant, water melon,<br />
long bean. The limiting factors are water inundation, low nutrient<br />
content and the peat susceptibility to subsidence and oxidation.<br />
PMU 16, 17 (moderately shallow to moderately deep peat, peat depth<br />
1,0 to