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  1. Preliminary study of the soils and salinity problems in the northern province of the Democratic Republic of the Sudan

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  2. Agricultural Ecology: The Impact of the Aswan High Dam Reconsidered

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  3. Percentage of good soils cropped

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  4. White Nile Reforestation; CIDA's Soil and Water Project in Egypt

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  5. Review of some aspects of soil reclamation in Iraq

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  6. CLEAR LAKE - Underwater soil sampling procedure

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    KP-2404-R2 - CLEAR LAKE - Klamath Project. Pumping air into bottom section of vehmeir tube to extrude soil sample. Winch at right is used to lower and raise 3" pipe in center of raft. Small winch at corner of...

  7. View of field on the Lower Klamath Lake, showing results of unsuccessful attempt at farming peat soils

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    KP-1270-R2 - Klamath Project - Region II. Twelve to eighteen inches of top soil has been removed by wind action disclosing the diatomaceous material in the subsoil. Notice pattern of plow soles. September...

  8. Backgrounder: Understanding Indoor Radon

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    Tap water and building materials can be sources of radon indoors, but the main mechanism for radon entry into most houses is the movement of soil gases - containing radon into the building. Radon seeps into a...

  9. General view of Project lands showing soil movement as the result of wind action

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    KP-1656-R2. Klamath Project; March 17, 1948; Photo by A. J. Burrows

  10. CLEAR LAKE - Underwater soil sampling raft

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    KP-2401-R2 - CLEAR LAKE - Klamath Project. Raft is propelled by one 15 H.P. and one 10 H.P. outboard motor; October 16, 1957; Photo by K. J. Greene

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