No, it's not a magic trick, it's one of the possibilities offered by the production chains, again. The IWMM Team offers on the modhub a lime factory that must be supplied with stones. And when we know the little point of collecting stones in the fields, as much as they are used for a few things. For € 80.000, + € 350 for monthly maintenance, you can deposit your stones (up to 9000 L) and wait for the factory to produce lime, which can be recovered with a trailer or directly using a spreader.