The effect of nutrient and water management on irrigated rice cultivation.
Paddy rice (Oryza sativa L.) was grown as three successive
annual crops (dry season of November February, early wet season
of Marche June, and late wet season of JulyeSeptember). During
the last part of the wet season, prior to the dry season, all field
plots were flooded by adjacent river water for 1.5e2 months
(SeptembereNovember). The soil underwent rotary tillage once
every year, before the early wet season, to a depth of 7e10 cm and
there was a hardpan at ca. 15 cm depth. Extension of rice roots
below this depth was very limited.
The effect of nutrient and water management on irrigated rice cultivation.Paddy rice (Oryza sativa L.) was grown as three successiveannual crops (dry season of November February, early wet seasonof Marche June, and late wet season of JulyeSeptember). Duringthe last part of the wet season, prior to the dry season, all fieldplots were flooded by adjacent river water for 1.5e2 months(SeptembereNovember). The soil underwent rotary tillage onceevery year, before the early wet season, to a depth of 7e10 cm andthere was a hardpan at ca. 15 cm depth. Extension of rice rootsbelow this depth was very limited.
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