This document contains information about agricultural crop fertilizer use and a supply chain optimization model. It lists the amounts in tonnes per annum of various crops that utilize NPK fertilizer. It then shows a diagram of a fertilizer supply chain that produces nitric acid, ammonia, nitrophosphate, superphosphate, and ammonium nitrate solution which are distributed and accumulated for sale to retailers. The goal is to optimize production in the supply chain to match the total fertilizer demand of 561,348 tonnes per year.