What is the nutrient content of composted leaves?

Question:

What is the nutrient content of composted leaves?

Answer:

The nutrient content of composted leaves is very small. The levels of nutrients vary somewhat from species to species. However, the nitrogen content of composted leaves on a dry basis usually varies from 0.5 to 1.0 percent. Potash amounts are in the same range. Phosphate amounts are around 0.1 percent. Increasing the organic matter content of the soil is the main benefit of incorporating composted leaves into the soil.