Paddy field in the valley cover photo - 121150915

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`Wet rice` redirects here. For the porridge dish, see Congee. `Rice field` redirects here. For the Rice University stadium in Houston, see Rice Track/Soccer Stadium. Paddy terraces in Kampung Naga, West Java, Indonesia Paddy fields in Laos Two paddy fields in Khulna, Bangladesh Paddy fields with transplanted seedlings in Karthalipalem village, Andhra Pradesh, India A paddy field is a flooded parcel of arable land used for growing semiaquatic rice. Paddy cultivation should not be confused with cultivation of deepwater rice, which is grown in flooded conditions with water more than 50 cm 20 in deep for at least a month. Genetic evidence shows that all forms of paddy rice, both indica and japonica, spring from a domestication of the wild rice Oryza rufipogon that first occurred 8, 200â€“13, 500 years ago South of the Yangtze River in present-day China. [1] However, the domesticated indica subspecies currently appears to be a product of the introgression of favorable alleles from japonica at a later date, so that there are possibly several events of cultivation and domestication.