thumb|Scots pine, a typical and well-known softwood
Softwood is wood from gymnosperm trees such as conifers. The term is opposed to hardwood, which is the wood from angiosperm trees. The main differences between hardwoods and softwoods is that the structure of hardwoods lack resin canals, whereas softwoods lack pores (though not all softwoods have resin canals).
Softwood is wood from gymnosperm trees such as pines and spruces. Softwoods are not necessarily softer than hardwoods.[1] The hardest hardwoods are much harder than any softwood,[2] but in both groups there is enormous variation with the range of wood hardness of the two groups overlapping. For example, balsa wood, which is a hardwood, is softer than most softwoods, whereas the longleaf pine, Douglas fir, and yew softwoods are much harder than several hardwoods.
Softwoods are generally most used by the construction industry and are also used to produce paper pulp, and card products.[3] In many of these applications, there is a constant need for density and thickness monitoring and gamma-ray sensors have shown good performance in this case.[4]
Certain species of softwood are more resistant to insect attack from woodworm, as certain insects prefer damp hardwood.
Softwood is the source of about 80% of the world's production of timber,[7] with traditional centres of production being the Baltic region (including Scandinavia and Russia), North America and China. Softwood is typically used in construction as structural carcassing timber, as well as finishing timber.