Unsupported. “Widely available commercial fertilizers” do not provide both the macronutrients and micronutrients necessary for soil’s long-term health. But this doesn’t mean that no fertilizer provides all necessary nutrients.

Unsupported. These macronutrients are available to homeowners in commercial fertilizers, but they might be available in other fertilizers or methods too.

Very strongly supported. Widely available commercial fertilizers only provide macronutrients, and soil needs both macro and micronutrients. Since raking grass clippings depletes micronutrients, commercial fertilizers alone are not enough to keep the soil healthy in these lawns.

Unsupported. Commercial fertilizers provide macronutrients and decaying grass clippings provide micronutrients. But these might not be the only sources of nutrients. There could be other methods, like using compost or manure, that also allow soil to remain healthy long-term.

Unsupported. Raking up grass clippings depletes soil’s micronutrients, but there might be other sources of micronutrients that homeowners can use to maintain the long-term health of their soil.