Full Belt of Fertilizer -- Self Feeding

It produces more than a belt's worth so that it can afford to feed itself and still have a full belt as output. Feeds itself using a Coal portal and a Stone portal. Requires level 5 for coal. 1 full belt of fertilizer is enough to supply 6 full belts of flax or 4 full belts of sage. Each of those takes 12 nurseries. Put money in both the small boxes that feed the portals and put fertilizer in the planters on the left (looking at it from the output side) to get it started. If you want to speed up the start up time, manually put some coal or wood in the furnaces on the left side.