Presenting you amazing invention of a Russian gardener Vladislav Fokin: ploskorez, Fokin's cultivator or Fokin's hoe, Ploskorez Fokina ("ploskorez" means flat-cutter) - a simple and versatile hand tool to replace usual gardening tools like spade, hoe, rakes etc, simplifying 20 gardening operations and essential for no-till gardening. See details and video here:
http://ecominded.net/news/fokin-s-ploskorez.html