RNGR.net is sponsored by the USDA Forest Service and Southern Regional Extension Forestry and is a colloborative effort between these two agencies.

U.S. Department of Agriculture USDA Forest Service Southern Regional Extension Forestry Southern Regional Extension Forestry

Skip to content. | Skip to navigation

Home Publications Nursery Manuals Forest Nursery Manual—Bareroot Chapter 7: Soil Fertility in Forest Nurseries

Chapter 7: Soil Fertility in Forest Nurseries

The soil cation-exchange complex serves as a reservoir of nutrients which are released into the soil solution, where they are accessible to seedlings. Although macronutrients are most readily available in soils of pH 6 to 7, micronutrients are most available in more acid soils; therefore, pH values of 5.0 to 6.0 are recommended for forest nurseries. Under such conditions, available nitrogen is primarily In the ammonium form, and phosphorus can form Insoluble iron and aluminum compounds. Sulfur, potassium, calcium, magnesium, and micronutrients are seldom deficient in forest nurseries because sufficient fertilizer is added as "maintenance" dressings, or supplies from native minerals are adequate. Recommended fertilizer applications for a 2-year nursery rotation range from 112 to 285 kg of nitrogen, 67 to 200 kg of phosphorus, and 75 to 150 kg of potassium per ha. Recommended nutrient levels In both soils and seedlings are tabulated and some effects of nutrients on seedling growth and physiology mentioned.

Download this file:

PDF document Download this file — PDF document, 110Kb


Author(s): R. van den Driessche

Publication: Nursery Manuals - Forest Nursery Manual—Bareroot