Greenhouse Gas Emissions from Soils Transitioning to Organic.

In this study, we are investigating greenhouse gas (GHG) emissions from a field transitioning from fallow to organic grain production (corn/sorghum/soybeans) near College Station, TX. Changes in nitrogen (N) and carbon (C) inputs due to tillage and cover cropping practices can contribute to differences in GHG emissions. Carbon dioxide (CO₂), methane (CH₄), and nitrous oxide (N₂O) emissions were continuously measured using eight automated soil chambers at 30-minute intervals using an integrated LI-COR 8100A (LI-COR Biosciences, Lincoln, NE, USA) -Picarro G2508 gas concentration analyzer (Picarro Inc., Santa Clara, CA, USA). Dissolved soil organic C and N, nitrate-N (NO₃^--N) and ammoniacal-N (NH₄⁺-N) were correlated to GHG emissions. Further results will be presented at the conference.