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Reduced head rice yield

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1. Major cause for fissuring of rice kernels is the moisture adsorption of individual dry grains with moisture contents below 16 %.

2. This can happen either when wet grain is mixed with dry grain or when dry grain is exposed to humid ambient air with a relative humidity higher than the equilibrium relative humidity at the corresponding grain moisture content. 

3. Fissures in rice kernels usually lead to cracking of the grain during the milling process and thus reduce the head rice recovery.

 

File Courtesy: 
http://www.knowledgebank.irri.org/rkb/index.php/drying-basics/grain-moisture-content-and-grain-quality
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