What are the best free trial plot report sites for comparing rice varieties by yield and disease resistance?

Here are some of the better free-trial/limited-free sites and platforms you can use to compare rice varieties by yield and disease resistance. I’ll focus on options that are actually useful for trial reports, variety performance, and breeding/production decision-making.

Best options to check first

1. Ricepedia / IRRI resources

• Best for: rice variety background, traits, and research-linked information
• Why it’s useful: The International Rice Research Institute (IRRI) ecosystem has a lot of variety and trait information, especially for disease resistance and adaptation.
• Limitation: Not always a polished “trial report comparison” tool, but very useful as a reference base.

2. Seed companies’ trial report portals

Many major rice seed companies publish trial summaries, plot reports, and side-by-side variety comparisons. These often include:

• yield
• lodging
• disease resistance ratings
• maturity
• grain quality

Examples to look for:

• RiceTec
• Corteva/Pioneer
• Bayer
• Syngenta
• regional rice seed companies in your country

Pros: often very practical and recent
Cons: data may be company-biased and mostly limited to their own varieties

3. University extension trial reports

• Best for: unbiased comparative variety trials
• Why it’s useful: land-grant universities and agriculture extension programs often run replicated rice variety trials and publish PDFs or searchable reports.
• Search terms to use:
  • “rice variety trial report yield disease resistance pdf”
  • “rice cultivar performance trial extension”
  • “state rice variety trials”

Examples by region:

• US: LSU AgCenter, University of Arkansas, Texas A&M AgriLife, Mississippi State
• Asia: national rice research institutes and agricultural universities
• Australia: NSW DPI / GRDC-related publications

4. Agronomy data platforms with free trials

Some platforms offer a free trial or limited access to plot-level data and analytics:

• Agworld
• Climate FieldView (more common for management than public variety comparisons)
• FarmQA
• Trial data management platforms used by breeders and agronomists

Pros: good for comparing replicated plot data
Cons: often not rice-specific, and trial access may depend on who uploaded the data

5. Agricultural market / research databases

Some broader platforms may include trial reports or linked PDFs:

• CABI
• Google Scholar
• ResearchGate
• FAO-related databases
• Plant Variety Protection / registration databases in some countries

These are useful if you want to build a comparison from published trial reports.

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Best “free trial” approach for your use case

If you want to compare yield + disease resistance, the most useful workflow is usually:

1. University/extension trial reports for independent yield data
2. IRRI or national rice research institute sources for disease resistance ratings
3. Seed company plot reports for local adaptation and recent performance
4. Put the data into a spreadsheet to compare:
   • yield (bu/ac, t/ha)
   • blast resistance
   • bacterial blight resistance
   • sheath blight tolerance
   • lodging
   • maturity days

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Good search targets

Try searching these phrases:

• “rice variety trial report pdf yield disease resistance”
• “rice cultivar comparison trial blast resistance”
• “rice extension variety trial table”
• “rice plot report free trial”
• “rice breeder trial data portal”

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My recommendation

If you want the best balance of reliability and free access, start with:

1. University extension variety trial reports
2. IRRI / Ricepedia / national rice research sources
3. Seed company plot reports
4. Google Scholar / ResearchGate for published trial PDFs

If you want, I can also give you:

• a list of the best sites by country/region, or
• a comparison table of specific rice trial report platforms with free-trial features.