Two years ago, I spread arborists chips over a 1/4-acre area that was significantly compacted. In one years', time the soil structure went from something you needed a pick and shovel to work to something you can literally work with your hands 4 to 6 inches down. I understand that this may not satisfy everyone's definition of composting, however it is a solid example of organic matter changing soil structure, biodiversity and overall health. If you increase moisture and organic matter you create an environment which cultivates microbial life. Soil health directly affects plant health and productivity. Actual composted organic matter may get you there faster, but I think the end result is pretty much the same.
One of the local farms I recently worked on as an environmental consultant was having trouble with soil degradation and low crop yields. The farm had largely used chemical fertilizers in its operations, which over time had damaged the soil. In response, we started a thorough composting program with local green trash and organic agricultural waste. Plants on the farm struggled to effectively absorb nutrients because of the soil's initial compactness and low organic matter content. Across a number of test plots, we started by adding premium compost to the top soil. Several months later, we saw substantial improvements. During dry spells, the soil became more friable and better able to hold moisture. The test plots significantly improved plant health and crop outputs, with yields increasing by as much as thirty percent in some places. This result set an example for other farms dealing with comparable problems and showed the real advantages of moving to sustainable composting techniques.
Sure, in my work with a community garden project, we introduced composting using kitchen scraps and garden waste. Over a single season, we observed a 30% increase in vegetable yield. The compost improved soil structure, boosted microbial activity, and provided essential nutrients. For best results, layer green and brown materials, keep the pile moist, and turn it weekly to aerate. This process creates a rich, organic fertilizer that can significantly enhance plant health and productivity.