Only one type of fertilizer may be used per soil tile. Fertilizer remains in the soil all season. When the season changes, fertilizer normally disappears. However, there are two exceptions in which fertilizer will remain in the soil: | Only one type of fertilizer may be used per soil tile. Fertilizer remains in the soil all season. When the season changes, fertilizer normally disappears. However, there are two exceptions in which fertilizer will remain in the soil: |