Technical Abstract: Understanding the control mechanisms of fumigant movement in soil is a fundamental step for developing management strategies to reduce atmospheric emissions. Most soil fumigants including chloropicrin (CP) are applied by shank injection and the application process often leaves vertical soil fractures that would potentially cause preferential fumigant movement and increased emissions. This potential transport pathway was evaluated using analytical and numerical model predictions by comparing simulated emissions and soil air concentrations, after assuming either point and rectangle sources for the injected CP, with direct field measurements. Results clearly showed that shank injected CP, when treated as vertical rectangle sources produced cumulative emission losses similar to the field measurements. Treating the shanked CP as point sources caused approximately 50% under prediction than the field measurements. The study also demonstrated that fumigant cumulative emissions can be predicted, with reasonable accuracy, using either analytical or numerical simulations.