Lawn soil test
I just got my soil test back. It shows low phosphorus level of 15.00 ppm (optimum 20 to 40 ppm) and a low potassium level of 37.00 ppm (optimum 150 to 250 ppm.) What is the best way to raise these levels?ANSWER:
Johnny - To help us better answer your question, please provide the following information (just add a comment to your submission):
What type of grass are you growing? In NE Alabama you are most likely growing a warm-season grass - bermudagrass, zoysia or centipedegrass. Is your lawn established or are you planting a new lawn? What is your soil type - Sandy, clay, loam? What is the pH? Soil type and pH affect nutrient availability.
What you are referring to is the Nutrient Availability Index
- and fertilizer rate recommendations for phosphorus and potassium are based on this index. Your soil test results should have a fertilizer recommendation - usually in pounds per acre - for phosphorus (P2
) and potassium (K2
O)- what are the recommendations?
Since your P and K levels are low, it will be helpful to use a complete (N-P-K) fertilizer based on your soil test results. Supply us with more information and we will help you develop your fertilizer program.
Organic matter acts as a storehouse for nutrients. Incorporating compost topdressing into your lawn maintenance program will also help you raise and maintain P and K levels.