Upland

NSIC Rc 33 (Katihan 5) Rice Variety: Characteristics and Grain Quality

NSIC Rc 33 is an inbred rice variety for upland fields, known locally as Katihan 5. The NSIC approved it in 2024. Its days to harvest and trial yield are not published yet, but its pest ratings and grain quality are below.

4 min read Updated October 17, 2026 By the anee.io agriculture team Read it all with Libre + Anee

If you came here looking for rice variety 33, or Rc 33, 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.

Holds up against: rice blast, stem borer.
Watch out for: tungro.
Cooked rice: intermediate amylose, so soft but not sticky.

Key facts about NSIC Rc 33

Key facts of NSIC Rc 33 (t/ha means tonnes per hectare)
Trait	Value
Year approved	2024
Local name	Katihan 5
Type	Inbred
Growing environment	Upland

How many days does it take, and how much does it yield?

This variety's days to harvest and trial yields are not published yet. So ask the seed seller or your municipal agriculturist for the figures from the trials in your region before you plan the season. Once you know the day count, anee.io dates every task from each lot's own planting day, with the growth stages and weather beside it. Meanwhile, our guide to raising rice yield per hectare covers the habits that matter with any variety.

Is it resistant to pests and diseases?

Reactions in trials: R resistant, MR moderately resistant, I intermediate, MS moderately susceptible, S susceptible. Some carry a second rating in brackets.
Pest or disease	Rating	What it means
Rice blast	Resistant	Held up well in the tests
Bacterial leaf blight	Intermediate	Took a middling share of damage
Tungro	Susceptible	Took heavy damage
Sheath blight	Intermediate	Took a middling share of damage
Green leafhopper	Intermediate	Took a middling share of damage
Brown planthopper	Intermediate	Took a middling share of damage
Stem borer	Resistant	Held up well in the tests

So scout early for tungro. 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

Grain quality of NSIC Rc 33
Measure	Value	Class
Amylose	18.6 percent	Intermediate
Milling recovery	70.9 percent	Premium
Head rice	56.3 percent	Grade 1
Chalky grains	16.5 percent	Not graded
Grain length	6.6 mm	Long
Grain shape, length to width	3.1	Slender
Protein	7.4 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 upland fields, with no standing water. So sow at the start of the rains, and keep weeds down in the first weeks, because upland rice cannot drown them out. Our rice variety finder lists the other upland choices. For the right month in your province, see the best time to plant rice.

Plan your next season of NSIC Rc 33

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.

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Varieties like this one

These come from the same kind of farm, with their days and yields. So if seed of this one is hard to find, compare these first.

NSIC Rc 25: 107 days, 3 tonnes per hectare on average, 2014
NSIC Rc 27: 107 days, 2.7 tonnes per hectare on average, 2014
NSIC Rc 29: 108 days, 2.3 tonnes per hectare on average, 2014
NSIC Rc 23: 108 days, 3 tonnes per hectare on average, 2011

What is the local name of NSIC Rc 33?

It is known as Katihan 5. Seed sellers and agriculturists use both names, so ask for either one.

When was NSIC Rc 33 approved?

The NSIC approved it in 2024. Its days to harvest and trial yield are not published yet, so ask for the regional trial figures before you plant.

Is this variety a hybrid?

No, it is an inbred. So the seed you buy grows true, but certified seed still gives the best start.

What should I watch for when I plant it?

In trials it was weak against tungro. So scout from the early weeks and act at the first signs.

Is it soft when cooked?

It has intermediate amylose, 18.6 percent. So it cooks soft but not sticky.

Where can I buy certified seed of this variety?

Ask accredited seed growers in your province or your municipal agriculturist. Look for the certified seed tag on the sack before you pay.

See how NSIC Rc 33 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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