Table V. Summary of εc trends and projections in major food crops

Positive trends in εc from multiple regression analyses were used to project the year in which εc will double and reach the theoretical maximum, assuming no changes in the coefficients due to climate change, breeding intensity, etc.

CropYOR SlopeYear of DoublingYear of Maximum
year−1 × 10−3
Maize0.34621342176
Wheat0.10523572391
Peanut0.12322732317
Soybean0.02929662986