Fat and Bony Cows

A commercial promoting Kainit potash fertilizer. Jíra's cows are bony because of bad fodder. Jíra can see that the cattle of his neighbour, Tomeš, are prized because the farmer fertilizes his fields and meadows with potassium and his cows thus have feed of much higher quality. Jíra therefore also begins to use Kainit potash fertilizer.