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This simple method requires sound planning and servicing of the water damming and channeling, but reduces the growth of less robust weed and pest plants that have no submerged growth state, and deters vermin.
While flooding is not mandatory for the cultivation of rice, all other methods of irrigation require higher effort in weed and pest control during growth periods and a different approach for fertilizing the soil.
Some varieties of long-grain rice that are high in amylopectin, known as Thai Sticky rice, are usually steamed.
A stickier medium-grain rice is used for sushi; the stickiness allows rice to hold its shape when molded.
The edible seed is a grain (caryopsis) 5–12 mm (0.20–0.47 in) long and 2–3 mm (0.079–0.118 in) thick.
Rice cultivation is well-suited to countries and regions with low labor costs and high rainfall, as it is labor-intensive to cultivate and requires ample water.
However, rice can be grown practically anywhere, even on a steep hill or mountain area with the use of water-controlling terrace systems.
Rice is the seed of the grass species Oryza sativa (Asian rice) or Oryza glaberrima (African rice).
As a cereal grain, it is the most widely consumed staple food for a large part of the world's human population, especially in Asia.
This method is a result of research carried out for the United Nations International Year of Rice.