History of fertilizer

The history of fertilizer traces how people replenished soil nutrients, from ancient organic amendments to industrially produced synthetic fertilizers.

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Manure: Animal dung and bedding used as an organic soil amendment and source of plant nutrients. Farms recycled livestock waste to restore nutrients removed by harvests.
Plant nutrition: The study of the mineral elements plants need for growth and how they acquire them. Identifying essential elements provided the scientific basis for targeted fertilization.
John Bennet Lawes: An English agriculturalist who patented superphosphate fertilizer and founded Rothamsted Experimental Station. His work helped establish the commercial phosphate fertilizer industry.
Green Revolution: A period of rapid agricultural yield growth driven by improved crop varieties, irrigation, and inputs. Synthetic fertilizers helped high-yield varieties produce much larger harvests.
Synthetic fertilizer: A manufactured fertilizer containing plant nutrients in chemically processed forms. Its industrial production differs from nutrient recycling through traditional organic amendments.
Green manure: Plants grown and incorporated into soil to add organic matter and nutrients. Cover crops replenished fields before synthetic fertilizers were available.
Justus von Liebig: A German chemist whose work helped establish mineral nutrition as a foundation of agricultural science. His theories encouraged replacing soil minerals removed by crops.
Joseph Henry Gilbert: An English chemist who collaborated with John Bennet Lawes on long-running agricultural experiments. Their research connected fertilizer treatments with measured crop yields.
Eutrophication: Nutrient enrichment of water that can trigger excessive algal growth and oxygen depletion. Fertilizer runoff became a major human source of aquatic nutrient pollution.
Organic fertilizer: A fertilizer derived from plant, animal, or other biological materials. It represents the biological nutrient sources used before industrial synthesis and alongside it.