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Water and soil
8 other sections not shown
according agricultural engineering auger hole branch drains Bremen clay drain pipes clay pipes combined drainage compacted compare Chapter compare Fig construction contour lines costs dammed water deep loosening deep plow determined discharge DM/ha drain spacing drainage depth drainage ditch drainage filters drainage machines drainage method Dranung EGGELSMANN entrance resistance filter pipes flow Flurber folio gley gley soils gradient ground-water highmoor hydraulic investigations irrigation Kulturt KUNTZE land layer loam m/day main drains main outfalls measures melioration mineral soils mole drains nomogram ochre clogging peat soils permeability Photo piezometers pipe drainage pipeless drainage planned plants plow depth podzolic pore precipitation pseudo-gley Publ pumping stations PVC drain pipes retention moisture soils saline soils sand shafts silt soil class soil science soil structure soil type stratum subsidence subsoil melioration subsurface drainage surface soil Table Wasser und Boden waterlogging width