Changes in cropping patterns and crop systems   indicate limited potential to reduce projected climate risks, with the majority of studies providing results of up to 1.5℃ of warming and limited evidence for higher warming levels. At 1.5℃, effectiveness in Africa is mostly insufficient, with substantial maladaptive potential . Over Asia, effectiveness is mostly small at 1.5°C with substantial residual impacts, further reducing to insufficient effectiveness at large residual risks at 4°C   . Amongst the options related to changes in cropping patterns and crop systems, shifting planting dates is projected to retain moderate to high residual risks under some specifications in Iran  and Morocco , while high effectiveness is reported for similar specifications in Thailand , Australia , Morocco  and Iran . Of the assessed adaptation options, changes in cropping patterns and cropping systems appear least effective in reducing climate risk, with decreasing effectiveness at higher levels of warming.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report