Introduction to major field crops (1+1)

Rainfed Low Land Rice

The rainfed lowland rice areas include the areas where the rain water stagnatesing low lying areas up to a depth of 100 cm or more. Water starts accumulating as the monsoon becomes active and reaches its peak in August-September and thereafter comes down gradually towards crop maturity in November-December. Frequent and heavy rains bring in flash floods because of over flowing of rivers in the catchment areas and drainage congestion in the coastal areas. Based on the depth of water stagnation in the fields, the rainfed lowland rice areas are classified as follows.

1. Shallow Low Land: The water stagnation is up to 0-30 cm depth. It is temporary and is confined mostly to peak period of rainfall during monsoon season. The crop may suffer due to drought at seedling stage.
2. Intermediate Low Land: The water depth ranges from 0-50cm. The drought at seedling stage is likely to be a problem.
3. Semi-Deep Low Land:In these areas water may stagnates for 5-6 months during wet season up to 0-100 cm.
4. Deep Water Low Land: In these areas generally water level is more than one meter and it may reach 3-5 meters. The type of rice cultivation in these areas is called as ‘floating rice’.Inter nodal length of theserice plantswill be more.