りんご紋羽病の発生と土壌状態との関係について(第2報)

概要

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The authors surveyed the apple orchards in Shimizu-Mura near Hirosaki for the purpose of researching the relationships between the occurrences of Mompa-disease of apple trees and their soil conditions.The region which we surveyed is a diluvial terrace covered with volcanogenous soil. The orchard soil in this region is known as a typical wet soil due to poor drainage. Of the area of this survey the results are summarized as follows : 1) The orchard soils in this region are classified into 4 groups according to the characters of the 2nd layers. 2) There seems to be no relation between the occurrences of Mompa-disease and poor drainage of the orchard soils within the area of this survey. 3) Mompa-disease occurrs abundantly in the orchards where the effective depth of their surface soils are too shallow ; and we could ascertain the fact that the main factor which controls the effective depth of the surface soils in such volcanogenous regions is the existence of excessive amounts of easily soluble aluminum in the subsoil, as reported in the previous paper.
社団法人日本土壌肥料学会の論文
1956-08-05