A note on organic lawn maintenance:
An organic lawn requires that the owner have a fair amount of tolerance for weeds. That's not to say that an organic lawn is "weedy", just that lawns that have no weeds are almost always chemically (pesticide & fertilizer) enhanced. A well and regularly maintained lawn is the key to weed management because healthy, thick turf with strong roots "out compete" weeds.
The real problems with turf are almost always related to soil issues. Either the soil is compacted, too wet, too dry, or just plain dead. Organic lawn maintenance should be renamed, "soil maintenance", because that is what is usually required.
Enjoy the slide show.