Table 2 Potential driving factors.
Category | No. | Data | Year | Source |
|---|---|---|---|---|
Soil | 1 | Bulk density | 2017 | |
2 | Cation exchange capacity | 2017 | ||
3 | Clay content | 2017 | ||
4 | Coarse fragments volumetric | 2017 | ||
5 | Derived available soil water capacity | 2017 | ||
6 | Organic carbon density | 2017 | ||
7 | pH in H2O | 2017 | ||
8 | Sand content | 2017 | ||
9 | Silt content | 2017 | ||
10 | Texture class | 2017 | ||
Socio-economic | 11 | Market access index | 2011 | |
12 | Market influence index ($/person) | 2011 | ||
13 | Market density index | 2011 | ||
14 | Night-time lights | 2010 | DMSP-OLS Version 4 | |
15 | Total GDP (based on purchasing power parity) | 2015 | ||
16 | Gridded population of the world | 2010 | ||
Accessibility | 17 | Time to nearest cities | 2015 | |
18 | Distance to the nearest river | N/A | Calculated in this study | |
19 | Distance to the nearest road | N/A | ||
20 | Distance to the nearest railway | N/A | ||
21 | Travel time one meter (motorized) | 2019 | ||
22 | Travel time one meter (walking-only) | 2019 | ||
23 | Time to the nearest healthcare facility (motorized) | 2019 | ||
24 | Time to the nearest healthcare facility (walking-only) | 2019 | ||
Agriculture and vegetation | 25 | 175 crops yield per hectare | 2000 | |
26 | Gross primary production-March/June/September/December | 2010 | ||
27 | Normalized Difference Vegetation Index (NDVI)-March | 2010 | ||
28 | NDVI-June/September/December | 2010 | ||
Terrain | 29 | Elevation | 2000 | |
30 | Variance of elevation | N/A | Calculated in this study | |
31 | Slope | N/A | ||
32 | Aspect | N/A | ||
Climate | 33 | Annual mean precipitation | 2007–2018 avg | |
34 | Mean precipitation-March/June/September/December | 2007–2018 avg | ||
35 | Annual mean temperature | 2000–2017 avg | ||
36 | Mean temperature-March/June/September/December | 2000–2017 avg | ||
Livestock | 37 | Buffaloes | 2010 | |
38 | Cattle | 2010 | ||
39 | Chickens | 2010 | ||
40 | Ducks | 2010 | ||
41 | Goats | 2010 | ||
42 | Horses | 2010 | ||
43 | Pigs | 2010 | ||
44 | Sheep | 2010 |
