3.6

This database will be used mainly for poverty and food insecurity mapping, particularly for analysing where the people live at global scales in relation to:

- Agroecological zones

- Marginal or productive lands

- Major foodcrop production systems, in particular those important to food security for the rural poor.

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This is an indicator for the amount of stored soil moisture readily available to crops. The water retention at 2 bar suction is used to separate easily available water (EAV) from water which is more tightly held at higher suctions and difficult

to abstract, especially from deeper subsoils; and in the use of a conceptual model of effective rooting depth.

The dataset is available for download (below) in both ASCII and ESRI GRID formats. A layer (.lyr) legend (.avl) and excel file are provided in the downloads.

Structure of the attributes

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The first digit indicates the dominant Smax class (60% of the cell). The second digit indicates the associated (40% of the cell) class. When the second number is 0, this indicates that the whole cell is made up by the Smax class indicated by the first number.

Easily available water

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The classes are:

1: Wetlands

2: > 120 mm/m

3: 100 - 120 mm/m

4: 60 - 100 mm/m

5: 40 - 60 mm/m

6: 20 - 40 mm/m

7: < 20 mm/m

97:Water

99:Glaciers, Rock, Shifting sand, Missing data

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ISO 19115:2003/19139

1.0