KALRO Bean Varieties
Beans technologies developed for the various agricultural ecosystems
Rice Plantations
With improved varieties at the Kisumu Kibos irrigation scheme
Director Food Crops
During a Rice Farmer Field day at the KALRO Kibos Centre
KALRO Cereals
Improved varieties of cereals at the markatplace in Nairobi


Introduction to paddy dry
Paddy drying

The moisture content of the harvested paddy is usually 25-28 %, therefore, there is need to dry to 14% moisture content (mc) before milling, storing and selling.

o    dry the paddy to 13-14 % mc, 14 % is good for milling while 13% is recommended for storage
o    spread paddy 2-3 cm on cement floor or canvas sheet
o    turn the paddy after every 30 minutes to ensure even drying
o    Sun-dry slowly for 2-3 days for the paddy to dry depending on the weather conditions, to reduce breakage during milling.
o    On a clear bright day, sun-dry for one day (about 9-10 hours) only by spreading paddy thinly on clean concrete floors, mats or tarpaulin.
o    Avoid drying on bare floors or roadside, the main source of contamination with sand pebbles, stones and other foreign matter that can reduce the quality of Rice.
o    Use a mechanical drier if available
o    after drying, paddy should be stored in sisal or jute bags in a room.
o    Electric drying is expensive. However, some large scale farmers have used the method.

Purpose of drying

  • To reduce moisture for.
  • Safe for storage
  • Safe for milling

Drying basics

  • Dry immediately after harvesting  to prevent fermentation of rice grains
  • Drying should take a maximum of 3 days under sun drying.
  • The drying floor should be clean and free from contact with moisture.
  • Use clean polythene sheets in the absence of a drying floor
  • Get enough labour to assist in drying if it is sun drying.
  • In mechanical drying clean the drier of previously dried paddy

Drying methods

  • Sun drying
  • Use of Mechanical driers
  • Examples of driers
  • Drier components

KnowledgeBank Crops

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KALRO Value Chain

Guava variety KALRO B8
Maize KALRO Mtwapa



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Rice blast disease

Favorable conditions for disease development:

  • Node blast: Black-brown lesions on the node.  
  • Neck blast: Black or brown rot on the neck of the panicle.