Linked from
The 32 pages that link to Scalar field, each with the reason it gives.
GradientNarrower topic: The gradient acts on scalar fields and produces vector fields.
LaplacianNarrower topic: The standard Laplacian acts on scalar fields.
Line integralNarrower topic: Scalar line integrals accumulate these pointwise values along a curve.
Yukawa interactionNarrower topic: It supplies the bosonic field in the interaction.
EquipotentialNarrower topic: An equipotential is a level set of a scalar field.