English: Studies on Water Characteristics of Volcanic Ash Soil on the Tsukuba Upland in Kanto Plain II. The Relation between Soil Moisture Retention and Sap Flow Velocity in the Japanese Red Pine and the Chinaberry Tree
Japanese: 筑波台地表層火山灰土の土壌水分特性に関する研究 II.土壌水分とアカマツおよびセンダンの樹液流速度