50 Fun Facts About Rice

Rice is the staple food of roughly what share of the world's population?

It is eaten most heavily in Asia and Africa; the three biggest consuming countries are all in Asia.

What is the scientific name of Asian rice?

African rice is a different species, Oryza glaberrima, domesticated separately in West Africa.

In which country was Asian rice first domesticated, at least 9,000 years ago?

Neolithic cultures in the Upper and Lower Yangtze tamed it from the wild rice Oryza rufipogon.

African rice was domesticated independently about how long ago?

The Spanish later carried the African species to the Americas.

Which two crops outrank rice in world production by weight?

About 800 million tonnes of rice were grown in 2023, but only some 8% of it was traded across borders.

Which two countries together grow about 52% of the world's rice?

Asia as a whole accounts for 90% of production.

By 2012, which country was the world's largest exporter of rice?

Developing countries dominate the trade; the biggest producer, once an exporter, had become the largest importer by 2013.

What is unmilled rice still in its husk called?

The word comes from Malay padi; the grain is ready to harvest at 20–25% moisture.

Brown rice is grain that has had only what removed?

Milling further strips the bran and germ to make successively whiter rice.

Parboiled rice is treated how before milling?

The process hardens the grain and pushes vitamins and minerals into the white part so they survive milling.

Which two starch components give different rice varieties their texture?

Sticky mochi rice is very low in amylose and high in amylopectin, which gives it that gel-like chew.

Black rice is called "forbidden rice" because it was once reserved for whom?

Its dark purple colour comes from high levels of anthocyanins.

Which medium-grain variety founded the Californian rice industry?

Carnaroli is considered the king of Italian rice, while Koshihikari is a prized Japanese sushi rice.

Golden rice was genetically engineered to supply a precursor of which nutrient?

It makes beta-carotene in the grain; in 2016 more than 100 Nobel laureates urged its use.

Roughly how much of cooked white rice is water?

The rest is about 29% carbohydrate and 2% protein, with a useful dose of manganese.

Rice is suitable for coeliacs because it contains no what?

It does provide protein, though not all the essential amino acids in sufficient amounts.

Which greenhouse gas do flooded rice paddies release in large amounts?

Long flooding starves the soil of oxygen, so organic matter ferments; alternate wetting and drying can cut emissions by up to 90%.

Rice cannot set grain if its flowers spend more than an hour at or above what temperature?

IRRI has predicted Asian yields could fall about 20% for every 1 °C rise in global mean temperature.

Rice blast, the most serious disease of growing rice, is caused by what kind of organism?

Magnaporthe grisea and bacterial leaf streak are perennially the two worst rice diseases worldwide.

Farmers in parts of Asia traditionally raise which animals in paddies to control pests?

The animals eat pests, manure the rice and, in the ducks' case, trample weeds, while yielding an extra crop.

In which Philippine town is the International Rice Research Institute headquartered?

Founded in 1960, it bred the varieties that drove Asia's Green Revolution and keeps a genebank of over 100,000 types.

What was the first Green Revolution rice variety, produced at IRRI in 1966?

It crossed an Indonesian variety, Peta, with a Chinese one, Dee Geo Woo Gen, and had short strong stems that would not fall over.

Which Chinese scientist set a world rice yield record of 17.1 tonnes per hectare in 1999?

He used hybrid rice with the System of Rice Intensification; the world average is about 4.7 tonnes per hectare.

Rice was the first crop plant to have what completed, in 2005?

Hundreds of wild and cultivated rice genomes have been sequenced since.

So-called "scuba rice" carrying the Sub1A gene can survive being underwater for how long?

Standard varieties die after about a week of stagnant flooding; IRRI has distributed Sub1A rice across South and Southeast Asia.

Rice is sensitive to cold and will not grow well below roughly what temperature?

Cold-tolerant risotto and basmati varieties were nonetheless trialled successfully on peaty soil in England in 2025.

Which barley gene, put into rice, cut the crop's greenhouse gas emissions by up to 97%?

It shifts growth from roots to shoots, starving the gas-making soil bacteria while boosting grain.

From seed to harvest, a rice crop typically takes about how long?

In deep water the plant can stretch to 5 metres, and in the tropics it can even survive as a perennial.

Transplanting rice seedlings by hand needs about how much seed per hectare?

Direct seeding uses 60 to 80 kg per hectare but far less labour; most rice in Asia is still transplanted by hand.

At the start of the American Revolution, rice ranked where among colonial exports?

Only tobacco, wheat and fish were worth more; rice had reached the Americas with the Columbian exchange.

Basmati, the long aromatic rice, is geographically exclusive to which two countries?

As of 2019 one of the pair handled 65% of the international basmati trade and the other the rest.

Jasmine rice's fragrance is often compared to popcorn and which leaf?

The aroma compound is 2-acetyl-1-pyrroline, and it fades fast, so connoisseurs prize each year's new crop.

Arborio rice takes its name from a municipality in which Italian region?

Its high amylopectin content keeps risotto creamy; Carnaroli and Vialone Nano are alternatives.

Which spice originally gave risotto alla milanese its yellow colour?

In Italy risotto is usually a first course, but the Milanese version is often served with ossobuco as a full meal.

Paella takes its name from what?

Purists say only paella valenciana, with rabbit, chicken, duck and snails, is the real thing.

Despite being called rice wine, sake is made by a process more like brewing what?

Starch is converted to sugar and fermented in the same vessel, a method called multiple parallel fermentation.

Mochi is a Japanese cake made by pounding what?

It is traditionally made in a mochitsuki ceremony and eaten at Japanese New Year.

Onigiri, the Japanese rice ball, is usually wrapped in what?

Traditional fillings are salty or sour, such as salted salmon or umeboshi pickled plum.

Congee, the rice porridge, takes its English name from which language?

It is often a breakfast or sickbed food, and features in many wartime and famine diaries as thin gruel.

Biryani is thought to derive from a rice dish of which cuisine?

It was likely developed in Mughal court kitchens, marrying slow-cooked pilau with yoghurt-marinated meat and Indian spicing.

Which company released Rice Krispies in 1928?

The elf mascots Snap, Crackle and Pop echo the noise the crisped rice makes in milk.

Which company introduced the first automatic electric rice cooker for homes in 1955?

The breakthrough was a double-layered pot: when the outer water boiled away, the thermostat sensed the jump and switched off.

Wild rice, or manoomin, belongs to which genus rather than Oryza?

It grows in shallow lakes and slow streams of North America and is gathered by Indigenous peoples.

The Banaue Rice Terraces were carved into the mountains of which Philippine province?

They sit about 1,500 metres up and are fed by irrigation from rainforests above; they appear on the 20-peso banknote.

In Hindu weddings, rice is thrown into a fire to symbolise what?

The Western custom of showering newlyweds with rice is a modified version of this rite.

Dewi Sri, a goddess who is transformed into rice in myth, belongs to which region?

Nepal and Cambodia mark the planting season with a Royal Ploughing Ceremony instead.

Which country lost rice crops worth $65 million to flooding in 2006?

Flooding hits some 20 million hectares of South and Southeast Asian rice every year.

The "alternate wetting and drying" method lets field water fall how far below the surface?

Farmers read the level through a perforated tube sunk into the soil, then reflood to 5 cm and repeat.

Which Spanish short-grain paella rice is unusual for not turning sticky when cooked?

Most short-grain rice is sticky and suits puddings; bomba is actually an Indica variety.

In 2018 the WHO strongly recommended fortifying rice with which nutrient?

It also conditionally recommended adding two further micronutrients, one of them folic acid.