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Identifying local yield gaps

Currently, there are inconsistent values reported on rice yield gap data in Asia, with some values being extremely different to others. Some value are outdated, and some are extrapolated across regions/cropping systems. 

Also, because of the limitations in these methods of calculation, a rigorous review of the available data, along with validation through researcher-led participatory field trials, is required to properly identify the exploitable yield gap that can be targeted in specific rice granaries in partner countries.

It is thus important that up-to-date data is collected over several seasons, with the following factors to be considered:

• cropping system, e.g. rainfed/ irrigated,
• variety (modern/traditional; high/low yielding);
• season and planting date;
• soil type

CORIGAP’s focus is on rice granaries, and there is a need to collect data over several seasons for these regions. Data will be collected through national statistics, household surveys, farmer diaries, and researcher-led field trials. Aside from the factors mentioned previously, data on whether a specific technology was adopted is also needed. Such data collection has already begun in China, Myanmar, and Vietnam.
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