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The amount of rice production measured in koku was the metric by which the magnitude of a feudal domain was evaluated. [4] A feudal lord was only considered daimyō class when his domain amounted to at least 10,000 koku. [4] As a rule of thumb, one koku was considered a sufficient quantity of rice to feed one person for one year. [5] [b] [c]
One koku (roughly equivalent to five bushels) was generally viewed as the equivalent of enough rice to feed one person for a year. The actual revenue or income derived from a holding varied from region to region, and depended on the amount of actual control the fief holder held over the territory in question, but averaged around 40 percent of ...
Updated for modern times using pennies and a hypothetical question such as "Would you rather have a million dollars or a penny on day one, doubled every day until day 30?", the formula has been used to explain compound interest. (Doubling would yield over one billion seventy three million pennies, or over 10 million dollars: 2 30 −1 ...
Rice is commonly consumed as food around the world. It occurs in long-, medium-, and short-grained types. It is the staple food of over half the world's population.. Hazards associated with rice consumption include arsenic from the soil, and Bacillus cereus which can grow in poorly-stored cooked rice, and cause food poisoning.
Rice is the seed of the grass species Oryza sativa (Asian rice)—or, much less commonly, Oryza glaberrima (African rice). Asian rice was domesticated in China some 13,500 to 8,200 years ago; African rice was domesticated in Africa about 3,000 years ago.
The United Nations World Food Program stated that this amount could feed 50,000 people for one day, [3] since it takes 400 grams or about 19,200 grains of rice to feed one adult for a day. [4] Using this calculation, enough rice was donated in 2008 to feed over 6,000 people daily for each day of that year. [5]
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Rice production is important to the food supply, with rice being a staple part of the Japanese diet. Japan is the ninth largest producer of rice in the world. [1] The rice seasons in Northern Japan last from May–June to September–October. In central Japan, it is from April–May to August–October.