The yield gap (Yg ) concept is based on definition and measurement of yield potential. Yield gap may be defined as the difference between yield potential or water-limited yield and actual yields (Van Ittersum et al. 2012; Lobell, Cassman, and Fields, 2009); but Mueller et al.
Yield gap is measured as the difference between yield potential or water‐limited yield and actual yield. Actual yield may be obtained through surveys or crop cuts; potential yields may be obtained from models and existing secondary sources, such as maps and experimental data.
