PSB Rc 12 (Caliraya) Rice Variety: Yield, Maturity and Characteristics
PSB Rc 12 is an inbred rice variety for rainfed lowland, known locally as Caliraya. The Philippine Seed Board approved it in 1992. It matures in about 109 days and averages 3.5 tonnes per hectare, with a top yield of 6 tonnes in trials.
The average and top yields in tonnes per hectare come from the trials each variety went through to be registered with the NSIC, and from what the seed companies say about their own seed.
What farmers harvest today can be different. Newer harvest records, the season, the place, the soil, the water and the care all move these numbers over time.
So use them to compare varieties, not as a promise for your field. Ask your seller or your agriculturist how the variety did on farms near you in the last few seasons.
If you came here looking for rice variety 12, or Rc 12, this is the one. Compare it with the other varieties in our rice variety finder before you buy seed. Also read our guide to rice varieties in the Philippines for how inbreds, hybrids and special rice differ.
- Maturity: about 109 days after sowing.
- Yield: 3.5 tonnes per hectare on average, or about 70 cavans of 50 kilograms. The best trial reached 6 tonnes.
- Season: Dry season and wet season.
- Watch out for: tungro, stem borer.
- Cooked rice: intermediate amylose, so soft but not sticky.
Key facts about PSB Rc 12
| Trait | Value |
|---|---|
| Year approved | 1992 |
| Local name | Caliraya |
| Type | Inbred |
| Growing environment | Rainfed lowland, transplanted |
| Recommended season | Dry season and wet season |
| How to plant it | Dry direct seeded, transplanted, wet direct seeded |
| Recommended for | The whole country |
| Maturity | 109 days after sowing |
| Average yield | 3.5 t/ha |
| Top yield in trials | 6 t/ha |
| Plant height | 89 cm |
How much does PSB Rc 12 yield?
On average it gives 3.5 tonnes per hectare. That is about 70 cavans of 50 kilograms of palay. It sits close to the average of the 25 rainfed lowland inbreds on the list, which is 3.4 tonnes. But the top yield, 6 tonnes, came from a trial with good water, seed and care. So plan your costs on the average, then work toward the top with the habits in our guide to raising rice yield per hectare.
How many days does it take to mature?
It takes about 109 days from sowing to harvest. Varieties of 100 to 120 days count as short duration and 120 to 140 days as medium, so this one counts as short duration. Then harvest when 85 to 90 percent of the grains turn golden yellow. Because the day count drives every task, anee.io counts it for you from each lot's own planting day, with the growth stages and weather beside it.
Is it resistant to pests and diseases?
| Pest or disease | Rating | What it means |
|---|---|---|
| Rice blast | Intermediate | Took a middling share of damage |
| Bacterial leaf blight | Intermediate | Took a middling share of damage |
| Tungro | Susceptible | Took heavy damage |
| Brown planthopper | Intermediate | Took a middling share of damage |
| Green leafhopper | Intermediate | Took a middling share of damage |
| Stem borer | Moderately susceptible | Took clear damage |
So scout early for tungro, stem borer. When you see the first signs, check the guide before you spray, because the right timing saves more than an extra dose. If you are not sure what you see, our pest and disease finders help you name it from the damage.
Grain and eating quality
| Measure | Value | Class |
|---|---|---|
| Amylose | 23.8 percent | Intermediate |
| Milling recovery | 66.8 percent | Grade 1 |
| Head rice | 5239 percent | Grade 1 |
| Chalky grains | 5 percent | Grade 2 |
| Grain length | 6.9 mm | Long |
| Grain shape, length to width | 3.2 | Slender |
| Protein | 8.1 percent |
Amylose decides how rice cooks. With intermediate amylose, expect rice that is soft but not sticky. In fact, Filipino taste has moved from high to intermediate and low amylose rice, because people want it softer. Head rice is the share of whole grains after milling. So a higher number means fewer broken grains and a better price at the mill.
Where should you plant it?
It suits rainfed lowland that depends on the rains. So wait until the rains settle before you sow the seedbed, then transplant into the puddled field. Our guide to rice land preparation shows each step. It is recommended for the dry season and the wet season. You can plant it dry direct seeded, transplanted or wet direct seeded. For the right month in your province, see the best time to plant rice.
Set the planting day of each lot and anee.io dates every task to harvest, with the weather beside it. Free on the Libre plan.
Start freeVarieties like this one
These come from the same kind of farm and grow about as long. So if seed of this one is hard to find, compare these first.
- PSB Rc 14: 110 days, 3.6 tonnes per hectare on average, 1992
- NSIC Rc 194: 112 days, 3.5 tonnes per hectare on average, 2009
- NSIC Rc 480: 107 days, 3.2 tonnes per hectare on average, 2016
- NSIC Rc 572: 109 days, 2.8 tonnes per hectare on average, 2019
What is the local name of PSB Rc 12?
How many days does PSB Rc 12 take to harvest?
What is the average yield of PSB Rc 12?
In which season should I plant it?
Is this variety a hybrid?
What should I watch for when I plant it?
See how PSB Rc 12 will do on your farm
With Libre + Anee, see its full record: how it yields, its strengths and weaknesses against pests, diseases and the weather, and whether it fits your farm, your season and your soil.
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