What is a yield gap?
The difference between the potential yield and actual yield obtained by farmers
What is actual yield?
The average yield achieved by farmers in a given region under dominant management practices (sowing date, cultivar maturity, and plant density) and soil properties, ideally over at least a 3-year period
What is potential yield?
The yield of the crop grown with unrestricted water and nutrients, and without stress from other living organisms
An example to demonstrate yield gaps (in green) in CORIGAP sites as calculated by the difference between the average actual farmers' yield and the best farmers' yield (top 10%).
Farmer yield estimates came from farmer surveys of the wet season of 2013 (China, Thailand, Myanmar, Vietnam), dry season of 2013 (Sri Lanka), and wet season of 2009 (Indonesia).