Yield and commodity grade of goji fruits under different Nitrogen fertilizations. Small letters indicate a significant difference (p < 0.05), as analyzed by Duncan’s multiple tests. The grading standard of the commodity grade of goji berry is according to the state council, the Ministry of Commerce and Health, GBT18672-2014 and other relevant national standards, as well as the particle size. The number of particles contained in 50 g fruits are: 5A—180 particle/50g; 4A—220 particle/50g; 3A—280 particle/50 g; 2A means inferior fruits, which not shown in the bar graph. (A) Yield of goji dry fruit; (B) Ratio of different grade goji fruit.