Root development of chestnut trees in relation to edaphic conditions (II)

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  • 地床状態が栗の根群の発達に及ぼす影響 (第2報)
  • 地床状態が栗の根群の発達に及ぼす影響-2-
  • チショウ ジョウタイ ガ クリ ノ コングン ノ ハッタツ ニ オヨボス エイキョウ 2
  • On the observations of chestnut trees in Aida Gun, Okayama Prefecture
  • 岡山県英田郡に於ける調査成績

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Abstract

(1) Chestnut trees (Castanea crenata S. et Z.) are compared with Konara Oak (Quercus serrata THUNB.) or Kunugi (Quercus accutissimma CARR.) on the adaptability to impermeable pan, which is called“Tokko”in the Aida Gun, Okayama Prefecture. Chestnnt trees are prevented markedly from deep penetration of root by the presence of“Tokko.”<br>(2) The“Tokko”is originated from the diluvial formation at Katabusikage, Town of Doi ; originated from the residual soil of tuff at Shikoe, Village of Yoshino and also originated from the colloidal clayey soil of the sea origin at Daishoji.<br>(3) It is certain probably that the“Type of Root Development”, or especially the“Type of Tap-root Development”which is proposed by the writers is a concise index to the vertical development of the root system of chestnut tree.<br>(4) Chestmit treeo grow well at talus or talus glacier with soil profile which are called“gravelly soil”or“gravelly and rocky soil”by Dr. KOIDE.<br>(5) We feel very interesting to know that there are many kinds of places where chestnut trees grow well or not owing to the soil conditions which due to the geological nature, mother rocks and topography, even at a small village not more than some 177 square-kilometers.

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