UWEX Fertilizer Calculator – This simple fertilizer calculator will be useful to homeowners, Master Gardeners, and turf and landscape professionals who want to quickly calculate the amount of fertilizer based on nutrient recommendations and the fertilizer analysis.

Purdue University Turfgrass Identification Tool

Purdue University Fertilizer Calculator and Comparison Tool

Purdue University Topdressing Calculator

Purdue University Seed Calculator

Texas A&M Fertilizer Spreader Calibration Tool 

Texas A&M Fertilizer Sprayer Calibration Tool

Pesticide Environmental Impact Quotient (EIQ) Calculator