References
- Bullock , P. , Fedoroff , N. , Jongerius , A. , Stoops , G. and Tursina , T. 1985 . Handbook for Soil Thin Section Description , 1–152 – 1–152 . Wolverhampton : Waine Research Publications .
- FAD^ . 1990 . Guidelines for Soil Description , 3rd ed. , 1–70 – 1–70 . Rome : FAD . (Revised)
- Flores , J.F. and Balagot , V.F. 1969 . “ Climate of the Philippines ” . In Climates of Northern and Eastern Asia, World Survey of Climatology , Edited by: Arakawa , H. Vol. 8 , 159–213 – 159–213 . Amsterdam : Elsevier Publishing Company .
- Kawaguchi , K. and Kyuma , K. 1977 . Paddy Soils in Tropical Asia, Their Material Nature and Fertility , 1–250 – 1–250 . Honolulu : Univ. Press Hawaii .
- Manalo , E.B. 1977 . Agroclimatic Map of the Philippines , Los Banos : International Rice Research Institute .
- Mehra , D.P. and Jackson , M.L. 1960 . Iron oxide removal from soils and clays by a dithionite-citrate system with sodium bicarbonate buffer . Clays Clay Miner. , 5 : 317–327 – 317–327 .
- Miura , K. , Badayos , R.B. and Briones , A.M. 1997 . Characteristics of soils of lowland areas in the Philippines with special reference to parent materials and climatic conditions . JIRCAS J. , 5 : 31–42 – 31–42 .
- Raymundo , M.E. , Mamaril , C.P. and De Datta , S.K. 1989 . Environment, Classification, and Agronomic Potentials of Some Wetland Soils in the Philippines, Book Series , Vol. 85 , 1–174 – 1–174 . Los Baños : Philippine Council for Agriculture, Forestry and Natural Resources Research and Development and International Rice Research Institute .
- Soil Survey Staff^ . 1994 . Keys to Soil Taxonomy , 6th ed. , 1–306 – 1–306 . Washington, D.C. : USDA .
- The Group of Japanese Pedologists^ . 1990 . Unified Soil Classification System of Japan (1st Approximation), Explanatory Book for Soil Map of Japan 1:1,000,000 , 1–47 – 1–47 . Tokyo : Naigai Map Inc. .