S: (n) stratification (the placing of seeds in damp sand or sawdust or peat moss in order to preserve them or promote germination)
S: (n) juxtaposition, apposition, collocation (the act of positioning close together (or side by side)) "it is the result of the juxtaposition of contrasting colors"
W: (v) implant [Related to: implantation] (fix or set securely or deeply) "He planted a knee in the back of his opponent"; "The dentist implanted a tooth in the gum"