Agricultural chemistry

Agricultural chemistry applies chemical principles to soils, fertilizers, crops, and animal nutrition. It studies how substances and reactions affect agricultural productivity and environmental quality.

Soil chemistry: The study of chemical composition and reactions in soil, including nutrient availability and acidity. Soil reactions govern which nutrients crops can absorb.
Fertilizer: A material added to soil or plants to supply nutrients and support growth. Fertilizer chemistry determines nutrient forms, release, and uptake.
Soil testing: The laboratory or field measurement of soil properties, especially nutrient levels and acidity. Tests translate soil chemistry into crop-specific fertilizer recommendations.
Eutrophication: The enrichment of water with nutrients that can drive excessive algal and plant growth. Nitrogen and phosphorus lost from farmland can trigger aquatic eutrophication.
Plant nutrition: The study of mineral elements and other substances required for plant growth and metabolism. It connects soil nutrient chemistry to crop growth.
Haber–Bosch process: An industrial process that produces ammonia by reacting nitrogen with hydrogen under high pressure and temperature. It supplies the ammonia used to make most synthetic nitrogen fertilizers.
Precision agriculture: Farm management that uses spatial data and technology to tailor practices to field conditions. Chemical measurements help vary fertilizer inputs across a field.
Nitrate leaching: The downward movement of dissolved nitrate through soil toward groundwater or drainage water. It links nitrogen fertilizer use to groundwater contamination.
Nutrient cycle: The movement and transformation of chemical elements through organisms and the environment. Nutrient cycling replenishes and redistributes elements used in agriculture.
Biological nitrogen fixation: The conversion of atmospheric nitrogen into biologically usable compounds by certain microorganisms. It adds reactive nitrogen to agricultural systems without industrial ammonia synthesis.

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