Pine trees produce A LOT of needles. If you have two or more pine trees in your yard, you've probably noticed these needles blanketing your landscape.
All-Purpose Pine - Mother Earth Living
22 Impressive Pine Needle Uses You'd Never Have Thought Of
The Crossett Story: The Beginning of Forestry in Southern Arkansas
Herbal Guide to Pine Needles - How to Identify and Use Pine Needles
Common Uses for Pine Needles - Woodsman Inc.
Making Sense of Wood Scents - David K. Leff, Essayist, Poet, Lecturer
Invasive Species Overview of the North Woods
22 Impressive Pine Needle Uses You'd Never Have Thought Of
Top 13 Uses for Pine Trees in Woodcraft and Self-Reliance