Instructions
Click the tractor icon at the bottom of the window to open the agricultural section of the game.
Click on a section of farmland to open its control icons.
Click on the cow head icon to convert the farmland to pasture land. This section of land no longer produces the soybeans that fill up the cistern. To empty the cistern faster, convert more farmland to pasture land; the more farmland squares you convert, the faster the cistern empties.
Click on the cow icon in the lower-left corner of the game screen to return to the feedlot and watch the cistern empty.