Rainfed rice - IRRI books - International Rice Research Institute

Rainfed rice categories
Comparative Analysis of Different Nutrient Management Practices in Rainfed Rice
Upland
Favourable uplands (high rainfall)
Unfavourable uplands (low
rainfall)
Rainfed lowland rice soils are
alluvial soils deposited by rivers
and their tributaries. Old alluvial
soils are deficient in N and P and
respond to N and P fertilisation.
New alluvial soils are rich in P and
K, are moderate in organic matter,
and respond to N.
Rainfed lowlands
Shallow lowlands (0-30 cm)
Medium lowlands (30-50 cm)
Deepwater lands (50-100 cm)
Very deep lands (> 100 cm)
Rainfed upland soils are acidic,
neutral to moderately alkaline and
calcareous, with occurrence of lime
concretions at varying depths. Most
of the soils are poor to medium in
nutrient content.
Nutrient management
practices
The following nutrient management
practices are mainly used under
rainfed conditions:
Fertilisers
Mineral fertiliser application is the
most widely used nutrient
management practice. The
recommended nutrient doses for
different situations are applied using
chemical fertilisers. Generally, all P
and K fertilisers are placed in the
soil. Nitrogen is applied as basal and
topdressing. Foliar spray of zinc and
other nutrients is also practiced.
Fertilisers and FYM
In this practice, the available FYM
quantity is applied when the land is
prepared. Since the availability of
FYM is very limited, the required
nutrient quantity is supplemented
with fertilisers.
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