Fig. 1. Theoretical cognition and objective of agricultural geographical engineering experiment

Fig. 2. Principles and methods of agricultural geographical engineering experiment

Fig. 3. The healthy soil-body construction and land improvement path

Fig. 4. The influencing factors and schemes of crop optimization

Fig. 5. Organization and time dimension of agricultural geographical engineering experiment

Fig. 6. The objects and spatial dimension for agricultural geographical engineering experiment

Fig. 7. Vegetation index (NDVI) of the Loess Plateau in 1998 and 2018

Fig. 8. Land consolidation engineering and test designing in loess hilly and gully region

Fig. 9. Case study of agricultural geographical engineering experiment