Chemical characterization of conducive and suppressive soils for potato scab in Hokkaido, Japan

Naoharu Mizuno, Hozumi Yoshida, Masami Nanzyo, Toshiaki Tadano

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11 Citations (Scopus)


Absract: Potato common scab induced by Streptomyces scabies is a serious constraint for potato-producing farmers and the incidence of potato scab depends on the soil chemical properties. We examined the chemical characteristics of conducive and suppressive soils to potato common scab with reference to the chemical properties of nonallophanic Andosols, recently incorporated into the classification system of cultivated soils in Japan. Allophanic Andosols with a ratio of pyrophosphate-extractable aluminum (Alp) to oxalate-extractable aluminum (Alo) of less than 0.3–0.4 were “conducive” soils with a high allophane content of more than 3%. On the other hand, nonallophanic Andosols with a Alp/Ala ratio higher than this critical value were “suppressive” soils, and their allophane content was less than 2%. The concentration of water-soluble aluminum (AI) was also a useful index for separating conducive from suppressive soils as well as the Alp/Ala value and allophane content. The suppressive soils showed a much higher concentration of water-soluble Al at pH 4.5 to 5.5 than the conducive soils. The high concentration of water-soluble Al may be responsible for the control of the incidence of potato common scab in Andosols.

Original languageEnglish
Pages (from-to)289-295
Number of pages7
JournalSoil Science and Plant Nutrition
Issue number3
Publication statusPublished - 1998
Externally publishedYes


  • Active aluminum
  • Nonallophanic Andosols
  • Potato common scab
  • Suppressive soil
  • Water-soluble Al

ASJC Scopus subject areas

  • Soil Science
  • Plant Science


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