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Soil penetration test (1)
Soil penetration test--Case studies (1)
Soil percolation (2)
Soil percolation--Mathematical models (1)
Soil permeability (1)
Soil permeability--Papua New Guinea (1)
Soil permeability--Thailand--Bangkok (1)
Soil physics (1)
Soil piping (Hydrology) (1)
Soil piping (Hydrology)--Thailand--Bangkok (1)
Soil pollution (6)
Soil pollution--Evaluation (1)
Soil pollution--Thailand (1)
Soil pollution--Thailand--Bangkok (2)
Soil pollution--Thailand--Tak (1)
Soil productivity -- Bangladesh (1)
Soil productivity--Bangladesh (1)
Soil profiles--Thailand (1)
Soil remediation (3)
Soil remediation--Toxicology--Thailand (1)