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I Am Engaged in Fertilizer Production in Da Song Dynasty ChichenkunHistorical292k Wordsongoing Lu Chen, a chemical genius, accidentally traveled to Lin'an City in the Southern Song Dynasty. He was surrounded by rotten stench every day and was looked down upon. When others cover their noses and run away, his eyes shine—— Nitrogen, phosphorus and potassium are the gold of crops, and nitrifying bacteria are the secret key to gunpowder! A handful of lime can remove odor, and three loads of fertilizer can be exchanged for a thousand gold; He built the "Sediment House" to triple the yield p 0Votes6Recs0Fans