What this means for your programme
Use the establishment-specific duration. The source flags cool-weather planting risk and disease concerns with excess nitrogen; strong straw does not remove those limits.
Planning interpretation by soil.ag, based on the profile below.
Where it fits
Lower northern irrigated lowlands. Strong straw and good milling quality; historical moderate resistance claims are location dependent.
What to watch
Susceptible to bacterial leaf blight and some brown planthopper populations; excessive nitrogen can worsen disease. Blast risk in central Thailand. Avoid late September to early November planting because of cold sensitivity.
These are historical variety descriptions. Check local scouting and current advice; a resistance claim does not rule out a problem in your field.
Use the calendar correctly
Wet direct seeding: 104–107 days; Transplanting: 112 days. The source gives separate ages by establishment method but does not explain how nursery time was counted.
Record sowing, transplanting and observed stages separately so comparisons use the same clock.
What does the yield reference tell us?
Official release-profile yield reference; site, season, input treatment and grain moisture are not fully specified here. Not a national average, field forecast or promised yield.
A yield figure alone does not identify the right fertilizer rate. Compare records with their soil, water, inputs and harvest basis attached.
Can I use GDD for this variety?
No reviewed simple harvest-GDD target is published here. A duration in days cannot be converted into a universal heat-unit requirement without temperature data and a defined starting point.
Read the crop-stage guide →Reference: Thai Rice Department · RD47 ↗. Official profile checked 27 September 2026.
Before choosing the next fertilizer split
Put previous applications, soil results, water management and crop observations beside the intended growth-stage window.
Review rice nitrogen timing →