Nitrogen Analysis (N-P-K)
The three numbers on fertilizer bags: percent nitrogen, phosphate, potash by weight. Lawn programs dose by real nitrogen — typically 1 lb N per 1,000 sq ft — so a 25-5-10 bag delivers it in 4 lb of product.
Where this appears in real estimates
This term isn't trivia — it's a working variable. These tools use it directly:
- fertilizer calculator — Product pounds from area, nitrogen target and bag analysis.…
- grass seed calculator — Seed pounds for new lawns and overseeding by species rate.…
Go deeper
- Sod vs Grass Seed — head-to-head decision guide
- Privacy Fence Installation — full project walkthrough
- Asphalt Cost in California — local pricing & climate
- Read the field guide on the blog — practitioner-level detail
- Related engineering article — from our licensed engineer
Reviewed: · Part of the CalculatorAsphalt Construction Glossary · Sources: see methodology & standards.