This course is only possible because of the generous support of





  • Nitrogen, phosphorus and potassium
  • Legally required label items
  • Difference between fertilizer grade and fertilizer ratio



Fertilizer “Burn” – The primary advantage of slowly-available nitrogen sources is that they can be applied at higher rates, which reduces the total number of times the fertilizer must be applied. When properly applied, they also reduce the chances of foliar burning that is common with ammonium nitrate and urea. Foliar burning is the brownish discoloration that occurs on grass blades as a result of contact with soluble fertilizer. It can be minimized by watering the lawn immediately after fertilizing


Please continue by taking the topics listed under “Lesson Content” below and taking the quiz when you finish the final topic.