References
- Akaike , H. 1974 . A new look at statistical model identification . IEEE Trans. Autom. Contol , AC-19 : 716 – 723 .
- Ando , H. , Adachi , K. , Minami , T. and Nishida , N. 1988 . Effect of soil ammonium nitrogen on the tillering-habit of rice plant . Jpn. J. Crop Sci. , 57 : 678 – 684 . (in Japanese with English summary)
- Ball , G.H. and Hall , D.J. 1965 . ISODATA, A Novel Method of Data Analysis and Pattern Classification , Melno Park , California : Stanford Res. Inst. .
- Fukushima Agric. Exp. Stn. 1972 . Soil Classification Map of Paddy and Upland Fields in the Aizu Basin , Fukushima : Fukushima Agric. Exp. Stn. . (in Japanese)
- Isbell , R.F. 1990 . “ Principles, needs and applications of soil classification systems ” . In Trans. 14th Int. Congr. Soil Sci. V4 – V9 . In, Kyoto
- Ishida , T. and Ando , H. 1994 . Computer-assisted mapping of paddy-field soils. I. Production of closely spaced data from sparse data relating to soil chemical properties . Soil Sci. Plant Nutr. , 40 : 391 – 402 .
- Matsuzaka , Y. 1969 . Study on the classification of paddy soils in Japan . Bull. Natl. Inst. Agric. Sci. Jpn. , B20 : 155 – 349 . (in Japanese with English summary)
- Miyazaki , Y. and Tsukahara , K. 1987 . Digital map information in Japan . Bull. Geogr. Survey Inst. , XXXII : 23 – 29 .
- Ohsumi , N. 1976 . “ ISODATA (iterative self-organizing data analysis techniques A) ” . In Development of Statistical Program Package, Reports of National Grant-in-Aid for Developmental Scientific Research , 38 – 48 . Tokyo : The Ministry of Education, Science and Culture . In, (in Japanese)
- Shoji , S. , Ando , H. and Masui , J. 1973 . Clay minerals of paddy soils in Tohoku district. III. Paddy soils near Aizutakada, Fukushima . Jpn. J. Soil Sci. Plant Nutr. , 44 : 197 – 203 . (in Japanese)
- Shoji , S. , Ando , H. and Wada , G. 1986 . Fate of nitrogen in paddy fields and nitrogen absorption by rice plants . JARQ , 20 : 127 – 134 .
- Ward , J.H. 1963 . Hierarchical grouping to optimize an objective function . J. Am. Stat. Assoc. , 58 : 236 – 244 .
- Webster , R. and Burrough , P.A. 1972a . Computer-based soil mapping of small areas from sample data. I. Multivariate classification and ordination . J. Soil Sci. , 23 : 210 – 221 .
- Webster , R. and Burrough , P.A. 1972b . Computer-based soil mapping of small areas from sample data. II. Classification smoothing . J. Soil Sci. , 23 : 222 – 234 .
- Yoshida , S. 1981 . Fundamentals of Rice Crop , 168 – 171 . Los Banos : IRRI .