Good nutrient management is essential for healthy forest production and environmental protection. The key to success is identifying the needs of target plants and matching fertilization operations to those needs. One way to accomplish this is to develop and implement a nutrient management plan based on soil, water, plant and organic material sample analyses, along with expected or desired timber yields (see Florida Extension Service Circular 1230). This should result in fertilizer application rates that minimize the amount of available nutrients while optimizing growth and yield.

In addition, it should be understood that not all silviculture strategies require, or can benefit from, forest fertilization. Where forest fertilization is conducted, such operations should be planned and implemented with consultation from a knowledgeable professional, and in accordance with all applicable BMPs or other measures that reduce nutrient delivery to water resources.

To that end, the following BMP represents fertilizer application limits not to be exceeded during forest fertilization operations (these are not recommended rates of application):

Elemental Nitrogen

No more than 1000 lbs/acres over any 20-year period.
No more than 250 lbs/acre for any 3-year period.
No more than 80 lbs/acre during the first 2-years of newly established plantations.

Elemental Phosphorus

No more than 250 lbs/acre for any 20-year period.
No more than 80 lbs/acre for any 3-year period.

Silviculture Best Management Practices 38