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Related Experiment Videos

Carbon emission from farm operations.

R Lal1

  • 1Carbon Management and Sequestration Center, School of Natural Resources, The Ohio State University, 2021 Coffey Road, Columbus, OH 43210-1085, USA. lal@osu.edu

Environment International
|June 16, 2004
PubMed
Summary
This summary is machine-generated.

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This study quantifies farm energy use in carbon equivalents (CE), revealing significant emissions from tillage, fertilizers, pesticides, and irrigation. Sustainable agriculture requires an increasing carbon output/input ratio for environmental health.

Area of Science:

  • Agricultural Science
  • Environmental Science
  • Climate Science

Background:

  • Farming operations consume significant energy, contributing to atmospheric carbon dioxide (CO2) enrichment.
  • Quantifying energy use in carbon equivalents (CE) provides a direct measure of CO2 impact.

Purpose of the Study:

  • To synthesize available data on energy consumption in farm operations.
  • To express this energy use in terms of carbon equivalent (CE) emissions.
  • To analyze the carbon footprint of various agricultural inputs and practices.

Main Methods:

  • Data synthesis of energy use in farm operations.
  • Conversion of energy use to carbon equivalent (CE) emissions (kg CE).
  • Analysis of emissions data per hectare (ha) for tillage and harvesting, per kilogram (kg) for fertilizers and pesticides, and per volume for irrigation.

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Main Results:

  • Tillage operations: 2-20 kg CE/ha; Chemical spraying: 1-1.4 kg CE/kg; Drilling/seeding: 2-4 kg CE/ha; Combine harvesting: 6-12 kg CE/ha.
  • Fertilizer emissions (kg CE/kg): Nitrogen (N) 0.9-1.8, Phosphorus (P2O5) 0.1-0.3, Potassium (K2O) 0.1-0.2, Lime 0.03-0.23.
  • Pesticide emissions (kg CE/kg a.i.): Herbicides 6.3, Insecticides 5.1, Fungicides 3.9.
  • Irrigation emissions: 129±98 kg CE for 25 cm water, 258±195 kg CE for 50 cm water.
  • Tillage method emissions (kg CE/ha): Conventional 35.3, Chisel/Minimum 7.9, No-till 5.8.

Conclusions:

  • Agricultural inputs like tillage, fertilizers, pesticides, and irrigation have substantial carbon equivalent (CE) costs.
  • Sustainable agricultural management necessitates a carbon output/input ratio greater than 1.
  • An increasing trend in the carbon output/input ratio over time is crucial for ecosystem sustainability.