This model simulates the percentage occurrence of rice cracking as function of the average maximum temperature experienced by the crop during the first ten days after heading date. The model (Nagata et al., 2004 and 2006) provides two different parameterization to mimic both low and moderate susceptibility to cracking damage.

The general algorithm is the following:

Where:

Crackedi (%) is the percentage occurrence of broken kernels;

TmaxAvg (°C) is the mean maximum temperature occurred in the first ten days after heading date;

αi, βi (unitless) are the coefficients of the equation, specific for both the considered degree of susceptibility to cracking.

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