When and Why to Fertilize

Fertilization should occur in newly established stands less than 5 years of age only when foliar analysis indicates nutrient deficiencies. Typically, fertilization is used as a mid-rotation treatment, coupled with a thinning, and is applied in the late spring or early summer. Application rates vary with soil types. Prior to any applications, the local soil scientist or Extension agent should test the soils for nutrient availability or deficiencies. The fertilizer can be applied in strips and bands or broadcast across the entire stand, but either method needs to stress the importance of uniform application. Irregular growth patterns may result from unbalanced distribution.

Keep in mind

• Fertilization should increase stand volume and value resulting from quicker stand development.

• Combining fertilization with proper site preparation, competition control and well-timed thins will increase the return from the investment, as will focusing rotations on the more valuable products, such as saw timber.

• In areas where pulpwood values are regularly high, fertilization will assist in producing product at shorter rotations.