Phosphates, nitrates, pyrites and potash make up Mineral Fertilizers, which are valued for some industrial applications but are most often used in agriculture.
Mineral Fertilizer is a Planetary Resource that can be extracted from a Mineral Fertilizer Tanks, if it is listed on the Planet's Geological Survey (GEO), or converted from Raw Resources on any Planet using a Stripmining Complex.
1 ton
Already learned - your empire starts with this technology.
Content contributed by Raven Zachary.