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How to operationalize the metric
Method of data collection and data needed to compute the method:
Research to monitor soil moisture uses specialized probes to take readings at various depths in the soil profile. The timing of the measurement is especially important and detailed studies may require daily readings throughout the growing season. A more qualitative assessment is also possible through visual or touch examinations of the soil at various depths.
Surveys can also be carried out to ask farmers about the timing of inadequate soil moisture on their fields.
Crop models can also simulate the water availability based on the level of plant growth, the daily climate information, and detailed soil characteristics.
Unit of analysis:
Limitations regarding estimating and interpreting: