What are the greenhouse gas emissions associated with management activities to enhance carbon sequestration?
Activities that sequester carbon in the soil or plants often require a change in how the land is managed. Changes in land management can increase or decrease emissions, and these changes can be compared to benefits from sequestration activities to estimate the net impact on greenhouse gas emissions. With respect to agricultural lands, management may include planting, soil tillage, fertilizer and pesticide applications, harvesting, crop drying, and a number of alternative soil amendments. These production inputs can produce direct emissions from the cropland area (e.g., tractor emissions from tillage machinery, N2O emissions from nitrogen fertilizer use) and indirect emissions from the production of management inputs (e.g., CO2 from natural gas in the production of nitrogen fertilizers). As the use of management inputs change with sequestration strategies, these changes together can influence the net greenhouse gas emissions from a given plot of land. Figure Figure Caption: Total US ave
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