Originally Posted by Smallaxe
This is an Ag related article, but it the context of lawn soils the following idea(from article) would also apply:
**"If crop nutrients are applied to the soil in excess, plants will not develop associations with soil organisms that help them acquire water and nutrients. After the “party is over” and the synthetic fertilizer is gone, the plants are left “high and dry” with few to no soil factory workers to help them access water and nutrients for the remainder of the growing season. The plants then give up valuable energy (sugars) in an attempt to make connections with microbes mid-way through the growing season when the plant should be putting that energy into flowering and seed development to produce a harvestable yield. By applying excess fertilizer, particularly nitrogen or phosphorus, we create plants that are very inefficient as they try to function without the support system of the soil with which they evolved."**
My concern would be, that if there was not enough SOM for the bacteria to work with, where would the 'nutrients cycle from'???
On a lawn we mulch the grass and feed it with a mix on a regular basis as described above.