This recommendation option is used to improve soil fertility to a high optimum level for the PLANT TYPE and AREA TYPE (use) specified High level fertilizer recommendations will rapidly build soil nutrient levels to the high optimum range. Select the option for the golf courses, intensively maintained turf, sod production, nursery production and other situations where vigorous growth is desired.

This recommendation is used to maintain soil fertility where optimum levels exist or to build to the medium range for the PLANT TYPE and AREA TYPE (use) specified. Select this option for routinely maintained residential, commercial and institutional grounds, and other situations where normal growth of turf or ornamentals is desired.

This recommendation is used to maintain low fertility levels or build fertility to low levels when deficiencies are found. Select this option when maintaining low maintenance turf; ex. cemeteries, parks, and school grounds. It should also be used for maintaining current health of mature trees and shrubs.

This recommendation option is used to improve soil fertility to a high optimum level for establishment of the PLANT TYPE and AREA TYPE (use) specified. Select this option when sampling is done prior to establishment (planting) or during the first three to six months following establishment (planting).