About SAKAMOTO DAISUKE
About Castanea crenata
About frost resistance
About freezing damage
About sierozem
About soil water
About water absorption
About cultivation management
About Borotan
About gray lowland soil
About water absorption
About soil moisture
About Fruit trees
About Soil physics
About Natural damages(=natural hazards)
About 果樹
About 発見
About NO
About クリ
About ぽろたん
About 凍害
About 土壌水分