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 Some value are outdated, and some are extrapolated across regions/cropping systems.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.