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Genesis of bleached red-yellow soils in the Okinawa Island



Genesis of bleached red-yellow soils in the Okinawa Island



Abstracts of Papers CLAMATROPS Conference on Classification and Management of Tropical Soils, Kuala Lumpur, Malaysia, August 1977: 5



A red-yellow soil with ashen gray surface horizons (these soils occur frequently in Okinawa Island) was studied. The soil has a thin A0, over dark gray A1 (7.5YR 5/2), light gray A2g (2.5Y 7/1), and transitional A3g horizons of loamy textures, over yellow brown (7.5YR 6/5-6) fine textured B21t-B23t horizons. Although clay skins are nearly absent in the Bt, the plasma is unusually abundant in birefringent zones. The clay content and the fine clay/coarse clay ratio have their maxima in the B22t.

Accession: 000666352

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