The rice cracking is a grain damage which usually halves the market value of head rice on an equal weight basis (Siebenmorgen et al., 2013). Furthermore, damaged productions cease to be suitable for direct human consumption, and they are often exploited by brewers industry and by the producers of livestock feed or pet foods (Paranthaman et al., 2009). The rice grain pericarp is hygroscopic and it adsorbs moisture in a humid environment while it desorbs moisture in a relatively dry environment (depending on vapor pressure difference between kernel surface and the surrounding air).The resulting stresses may cause fissures in rice kernels when the stresses exceed the failure strength of the grain (Lan et al., 1999).

The available approaches to calculate this output variable are:

• Nagata model (2004; 2006)
• Cappelli model (2015)

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