Keyphrases
Northern China
100%
Indexes Variation
100%
Normalized Difference Vegetation Index
100%
Vegetation Index Time Series
100%
Cropping Index
100%
Rate of Change
9%
Effective Metric
9%
Index Changes
9%
Statistical Data
9%
Human Activities
9%
Interannual Variation
9%
Agriculture Systems
9%
Impact on Agriculture
9%
Climate Change Impacts
9%
Food Security
9%
Food Production
9%
Chinese Food
9%
Arable Land Use Intensity
9%
Vegetation Status
9%
Drainage Area
9%
Multiple Cropping Systems
9%
Huang-Huai-Hai
9%
Interannual Fluctuations
9%
Earth and Planetary Sciences
Time Series
100%
Normalized Difference Vegetation Index
100%
China
100%
Statistical Data
33%
Climate Change Impact
33%
Food Production
33%
Vegetation
33%
Land Use
33%
Annual Variation
33%