 The expansion of cultivated land has been linked to increased greenhouse gas, GHG emissions from agricultural soils. This study examined the effects of cultivation history on GHG emissions from subtropical soils in South Florida. The results showed that newly converted soils released more GHGs than continuously cultivated soils due to their greater organic matter content, moisture, porosity, and bulk density. However, these differences were not observed after several years of continuous cultivation. Overall, this research suggests that GHG emissions from agricultural soils may decrease over time as they become more established through continued cultivation. This article was authored by Fioro Fall, Katie Hayden, Ashley U. Smith, and others.