FAO +331 +33* +33/ +32* +-**, ha,**+ Seiichi Ohta : Soils of Humid Tropical Forests in Southeast AsiaTheir Characteristics and Changes with Forest Degradation 2 No. /-,**,
U.S. Soil Taxonomy FAO 12,, 0. Ohta & E# e- ndi +33, a, +33, b and Ohta et al. +33- Hirai et al. +331 Droybalanops aromatica D. lanceolata, No. /-,**, 3
+ + 4 No. /-,**,
Imperata cylindrica + +31* +32, 3+ 3. 32 +32* +33. +32, Macaranga gigantea A +32, + / C - / C A ph, - No. /-,**, 5
, -, Jordan +32/ ph H, O A Tulaphitak et al. +32/ C, - *,* cm :n,* A :n1 C :n +. :n+- 6 No. /-,**,
. Acacia auriculiformis / Pinus kesiya 2 Ohta +33* b Jordan +32/, Acacia auriculiformis Pinus kesiya / 2. Ohta +33* b C A No. /-,**, 7
Ohta et al.,*** AE ph, - ph Ohta +33* a A - Ohta, +33* a Scott, +312 +*,* 8 No. /-,**,
+ Golley, +32- kgha kgha P K Ca Mg Na Co Cu Fe Mn Sr Zn +0. +4* +0. -5+*- 34/ -,1.5+*-,34* +.+.,3.43 22 // -+4*, +,,4* 0, *4/ - +2-4* 0,3 *4. 1-,+ *4+,+* 2 *43 3 + No. /-,**, 9
/ Eucalyptus deglupta : 1 -,+ + Folster & Khanna +331 Golley +32- / Folster & Khanna +331 10 No. /-,**,
FAO ( +331 ) State of the World s Forest, +331. Food and Agriculture Organization, Rome, Italy. Folster, S. and Khanna, P.K. ( +331) Dynamics of nutrient supply in plantation soils. In Management of soil, nutrient and water in tropical plantation forests. Ed. Nambiar, E.K.S. and Brown, A.G., p. -0/, ACIAR, Canberra. Golley, F.B. ( +32-) Nutrient cycling and nutrient conservation. In F.B. Golley ed. Tropical Rain Forest Ecosystems, pp. +.2, +/,, Elsevier, Amste. Jordan, C.F. ( +32/ ) Nutrient Cycling in Tropical Forest Ecosystems, pp. -+, -1.-, +*. +*1, +,1 +,2, John Wiley & Sons, Ltd., Chichester. Hirai ( +331) Soils and distribution of Dryobalanops aromatica and D. lanceorata in mixed dipterocarp forests. A case study at Lamibir Hill National Park, Sarawak, Malaysia, Tropics, 1 :,+ --. +33.,3 :.0 /. Ohta, S. ( +33* a) Influence of deforestation on the soils of the Pantabangan area, Central Luzon, the Philippins. Soil Sci. Plant Nutr., -0 : /0+ /1-. Ohta, S. ( +33* b) Initial changes associated with a# orestation with Acacia auriculiformis and Pinus kesiya in denuded grassland of the Pnatabangan area, Central Luzon, the Philippins. Soil Sci. Plant Nutr., -0 : 0--0.-. Ohta, S. and E# endi, S. ( +33, a) Ultisols of Lowland Dipterocarp Forest in East Kalimantan, Indonesia. I. Morphology and physical properties. Soil Sci. Plant Nutr., -2 : +31,*0. Ohta, S. and E# endi, S. ( +33, b) Ultisols of Lowland Dipterocarp Forest in East Kalimantan, Indonesia. II. Status of carbon, nitrogen, and phosphorous. Soil Sci. Plant Nutr., -2 :,*1,+0. Ohta, S., E# endi, S., Tanaka, N. and Miura, S. ( +33-) Ultisols of Lowland Dipterocarp Forest in East Kalimantan, Indonesia. III. Clay minerals, free Oxides and exchangeable cations. Soil Sci. Plant Nutr., -3 : + +,. Ohta, S., Morisada, K., Tanaka, N., Kiyono, Y. and E# endi, S. (,***) Are soils in degraded dipterocarp forest ecosystem deteriorated? In Rainforest Ecosystems of East Kalimantan, Ecological Studies Vol. +.*, Ed. E. Guhardja, M. Fatawi, M. Sutisna, T. Mori and S. Ohta, p..3 /1, Springer-Verlag Tokyo. Scott, G.A. J. ( +312) Glassland development in Gran Pajonal of eastern Peru. PhD Dissertion, Department of Geography, University of Hawaii. No. /-,**, 11