"Drenagem agrícola." . . . . . . . . . . . . . "Guide to integrating plant, soil, and water relationships for drainage of irrigated lands"@en . "Drainage manual a water resources technical publication" . "Drainage manual : a water resources technical publication :a guide to integrating plant, soil, and water relationships for drainage of irrigated lands" . . "Drainage manual : a water resources technical publication : a guide to integrating plant, soil, and water relationships for drainage of irrigated lands"@en . . "Drainage manual : a water resources technical publication : a guide to integrating plant, soil, and water relationships for drainage of irrigated lands" . "Drainage manual : a water resources technical publication : a guide to integrating plant, siol, and water relationships for drainage of irrigated lands"@en . . . "Drainage Manual - a Water Resources Technical Publication - a Guide to Integrating Plant, Soil, and Water Relationships For Drainage of Irrigated Lands" . . "Drainage manual : a water resources technical publication: a guide to integrating soil, and water relationships for drainage of irrigated lands" . "Handbooks and manuals"@en . . . . . "Basic data; field and laboratory procedures; in-place hydraulic conductivity tests below a water table; in-place hydraulic conductivity tests above a water table; laboratory tests for hydraulic conductivity; observation holes and piezometers; drainage investigations; design and construction; spacing of drains; interceptor drains; open drains; pipe drains; special drain types; investigation and layout for drains; operation and maintenance of drainage systems; special drainage problems." . . . .