A mid-rotation pine stand fertilization calculator
for material needs, cost, and rate of return
R. Hitchcock, D. E. Kissel, and D. Dickens
Calculating pounds per acre of fertilizer materials needed and cost for a single NP or NPK fertilizer application in a loblolly, longleaf, or slash pine stand based on a publication by Dickens, Moorhead, Morris and Kissel (2010):
A checklist for fertilization of loblolly, longleaf, and slash pine stands
Usually a stand is fertilized with N and P so there will be many cases where K is not needed.
Stands that need K added are where foliar K < 0.25%, especially in longleaf stands.
Options
P Source:
1. Fertilizer materials needed
| Nutrient | Pounds per acre needed | |||
|---|---|---|---|---|
| Elemental nutrient | Urea (46-0-0) | DAP (18-46-0) | MOP (0-0-60) | |
| Nitrogen | 75 - 250 | |||
| Phosphorus | 20 - 50 | |||
| Potassium | 40 - 80 | |||
2. Cost per acre for fertilizer materials
Enter total cost per acre if known: $
Otherwise, enter the data below:
| Fertilizer material | Pounds per acre | Cost per ton ($) | Cost per pound of nutrient ($) | Cost per acre ($) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Urea | N: | ||||||||||
| DAP | P: | ||||||||||
| MOP | K: | ||||||||||
| Fertilizer cost per acre | |||||||||||
| |||||||||||
| Total cost per acre | |||||||||||
3. Rate of return (ROR) estimates based on fertilizer cost and anticipated extra wood value grown
| Up-front cost | Final harvest numbers | |||||
|---|---|---|---|---|---|---|
| Total cost per acre | Estimated extra wood growth rate (tons/ac/yr) | Value of extra wood grown ($/ton) * | Number of years to final harvest | Extra wood grown final value ($/ac) | Rate of return expressed as interest rate | |
5 - 10 years | ||||||