Chemical Oxygen Demand(COD), 335
Chugoku region, 299–309, 311, 313–318, 321, 324
Cirques, 30
Civil engineering, 70, 71, 73, 74
Clay film, 104
Clay mineral composition, 331
Climate, 327, 328, 330, 332, 336, 340, 341, 344, 348, 354, 355
Climate zone, 13, 14, 16
Climosequence, 192
Co-application, 339, 340
Coastal alluvial plain, 276
Coastal flood, 359
Coastal plain, 13, 30, 32
Coldness index, 41
Compaction, 70, 107
Component plant species, 75, 79, 82
Compost, 193–196, 202–204, 210, 211, 220, 234, 240, 336, 337, 343,
345, 348, 349, 352–354, 357
Composting, 352, 354
Compost-mixed compound fertilizer, 352
Coniferous forests, 39–41, 43, 91, 97
Conservation, 8
Content of soil available phosphate, 346
Continuous cropping, 142
Coppicing, 349, 350
Coral reef, 34
Coral reef terrace, 34
Creep, 29, 30
Crop nutrition diagnostic criteria, 169
Cropping system, 142, 143, 180
Crop rotation, 142, 143, 158, 166, 176
Cryptomeria, 7
Crystalline clay mineral, 5
Crystallinity ratio, 104
Cultivated land, 3, 7, 9
Cumulic humic horizon, 83
Cutting and banking soils, 73
D
Dairy farming, 7, 135, 136, 149, 161, 162, 167
Dark red soil, 110, 113, 118
Debris flow, 29–31
Deciduous broad-leaved trees, 16, 17, 38, 41
Decomposition, 149, 151, 153–156, 158, 159, 165, 166, 175
Deep tillage, 48
Degree of decomposition, 75, 79, 80
Denitrification, 338, 353
Densic horizon, 70
Desalination, 222, 227, 230, 343
Direct seeding, 47
Discharge, 145, 165
Dissolved organic matter, 80, 93
DKP tephra, 274
Double cropping, 340–342
Drainage, 6, 8, 9, 136–140, 142, 143, 149, 160, 165, 166, 174, 331,
332, 340, 341, 343, 348, 358, 359
Drainage performance, 359
Dry phase (granular structure type), 119
Dry phase (loose granular structure type), 119
E
Earthworks, 71
Echigo plain, 246, 248
Edo period, 39, 41, 43
Efficient fertilization, 285
Eluviation, 69, 90, 93–95, 97, 114
Emergency soil survey, 358
Emission, 135, 155, 156, 159, 160, 165–167, 174–176
Endoaquic properties, 89, 118, 126
Environment, 339, 346, 348, 354, 356
Environmental problem, 285, 295, 348
Environmental burden, 158
Environmental conservation, 159, 160, 169, 170
Environmental Impact, 135, 168, 169
Environmental issues, 3, 9
Environmentally friendly agriculture, 3, 9, 135, 166, 168, 284, 285
Environmental protection, 291, 293
Eolian dust, 21, 31, 35–38
Eurasian Plate, 22
Eutrosols, 60, 61, 64, 66
Evergreen broad-leaved trees, 17, 41, 43
Exchangeable K, 188, 230, 233–237, 242
Exchangeable potassium, 256, 257, 259, 261, 263
Exchangeable sodium percentage, 222
F
Farmyard manure, 174, 176
Ferrihydrite, 84, 90–92, 104
Fertilization, 135, 136, 138, 142–145, 147–151, 158, 160, 166–168,
180
Fertilization standards, 3, 9, 141, 143, 144, 150, 166, 168
Fertilizer application, 343, 344, 348, 353, 354
Fertilizer application method, 322
Fertilizer calculation system, 201
Fertilizer recommendation, 140, 141, 147, 150, 166, 168, 169, 172,
180, 181
Fibric soil materials, 75, 79
Field improvement, 3, 8
Flora, 40–42
Fluvial lowlands, 30–32
Fluvial peatland, 76, 78, 79
Fluvial terraces, 15, 30–32, 35
Fluvic soils, 3, 5, 53, 58, 59, 62–68, 138, 165, 249, 261, 281, 295, 328,
331, 332, 342–344, 346
Food self-sufficiency ratio, 47
Forage crops, 7
Forearc, 23, 25
Forest, 3, 5–7, 13, 17, 19, 38–45, 47
Forest management, 153, 156
Forestry, 7, 8
Forest soil, 153–156
Forest vegetation, 30, 38, 41
Fossil periglacial phenomena, 15, 17
Foxtail millet, 351
Frigid, 77, 78
Fruit, 7
Fuji Black Horizon, 252
Fukushima Daiichi Nuclear Power Station, 7
Fulvic acid, 92–94, 97
Fundamental Soil Survey for Soil Fertility, 8, 9
Fundamental Soil Survey for Soil Fertility Conservation, 3
G
Gentan policy, 46, 47, 308
Geology, 328, 330, 331, 355
Geomorphology, 330
Glacial periods, 15, 17–20, 30, 32, 37, 38, 41, 43
Gleyed Andosols, 251, 257
368
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