火山性土の凍結並びに融凍作用が土壌と作物に及ぼす影響とこれが対策に関する研究 (第3報)

概要

論文の詳細を見る
In this paper authors described the investigation of factors bearing upon freezing type of volcanogenous soil. (1) Air temperature is important factor affecting to the freezing type of soil, but it is difficult to determine the freezing type only by the air temperature, because it is also influenced by the other factors, for instance, amount of snow, soil water and etc. (2) Ealier the season of snow come and more the amount of snow fell; thinner the depth of soil layer freezed and less the injury affected to the soil and crops. (3) Correlation between erupted materials and freezing type are also resolved. Freezing type of volcanic ash shows the most evil form, but pumice shows no more injury affected for soil and crops by freezing. In a case of volcanic sand soil, influence by freezing are same as volcanic ash soil except for not so clearly distinguished. (4) Large quantity of soil water, large quantity of water capacity, strong capillarity, high ground water level, loose structure of soil are causes to form the injurious freezing type, because these are considered the suitable condition for lifting the soil water to surface from subsoil which are counted the most important factors to form the evil freezing type. (5) Constitution of soil profile are also connected with freezing type. Such constitution as surface soil is volcanic ash and subsoil is volcanic ash or volcanic sand, there observed the injurious freezing type, and even if surface soil is volcanic ash or volcanic sand, but subsoil is pumice, there observed slightly injurious freezing type. (6) Method of soil management before the freezing are also observed to connected with the freezing type, and such management as destructed the soil structure, for instance, ploughing the field after harvested the crops are accelerated to form the injurious freezing type.
社団法人日本土壌肥料学会の論文
1955-03-31

火山性土の凍結並びに融凍作用が土壌と作物に及ぼす影響とこれが対策に関する研究 (第3報)

スポンサーリンク

概要

著者

関連論文

スポンサーリンク