In the most cases, you can use the groove type compost turner in anyway small or large scale cow farm. It depends on the fermentation trench you built. When you have large output cow manure to dispose, you can build multiple trenches. When you have little output cow manure, you can build one trench. We can design 0.8m, 1.0m,1.2m, 1.5m, four turning depth as your requirements. And we have water spray system in the top of the machine. How many spare parts the machines included? It control panel, groove changing device, electric cable winding wheel and other optional spare parts. The optional spare parts includes water spray system, rail and turning teeth.