booklet aceh barat.pdf - Balai Penelitian Tanah

V. LANDUSE RECOMMENDATION
5.1. Agricultural Crops
The evaluation has been carried out for a number of selected tree crops (oil
palm, cacao, coffee, rubber, coconut, rambutan, mango, manggosteen, durian,
banana, citrus, pineapple, patchouli, papaya, clove, and lanseum) and annual crops
(wetland rice, upland rice, maize, soybean, mustard, water melon, taro, long bean,
peanut, red chilli, egg plant, sweet potato, and cassava).
The main restricting factors taken into account were: nr: nutrient retention
(low nutrient/low fertility); eh: erosion hazard (slope); oa: oxygen availability (soil
drainage); rc: rooting condition (sandy material of sub-soil); fh: flood hazard (water
inundation); ps: peaty soil, low nutrient and poor drainage; and wa: water availability
(influenced by annual rainfall). Land suitability by soil mapping unit (SMU) is
provided as follows:
SMU 1, (sand beach recent) is not suitable (N) for any kinds of crops. The main
limiting factors are rooting condition/loose sand accumulation resulted from
tsunami deposition..
SMU 2, 3, 4, and 5 (complex of recent beach ridge and swale in marine region) are
marginally suitable (S3) for cocoa, coconut, coffee, water melon and patchouli.
The major limiting factors are low nutrient availability and rooting condition
(sandy texture of sub-soil), and brackish water.
SMU 6 and 8 (complex of beach ridges and swale-recent with poor drainage) are not
suitable (N) for tree crops, but moderately suitable (S2) for wetland rice. The
limiting factors (for upland agriculture) are water inundation (for tree crops),
low nutrient content and sandy texture of sub-soil.
SMU 9 and 10 (complex of sub recent beach ridge and swale in marine region) are
marginally suitable (S3) for cacao, coconut, coffee, rubber, oil palm, lanseum,
rambutan, durian, manggo, citrus and water melon. The main limiting factors
are low nutrient content and sandy texture sub-soil.
SMU 7 and 14 (sub recent of beach ridges and swalles covered by shallow peat),
are marginally suitable (S3) for rubber, oil palm and paddy. The limiting factor
are: water inundation, low nutrient and sandy material of sub-soil.
SMU 13 (beach ridges sub recent) is moderately to marginally suitable (S2, and S3)
for coconut, coffee, cacao, lanseum, mango, manggosteen, rambutan and
banana, water melon, maize and peanut. The limiting factors are low nutrient
and sandy material of sub-soil.
SMU 15 (thin peat: 0.5 – 1.0 m) is marginally suitable (S3) for rubber, oil palm,
coconut, mustard, egg plant, long bean, and water melon. The limiting factors are
water inundation, low nutrient content and shallow peat (