Discussion
Three of the following reduce head rice yield. Which protects it?
Slow and even drying of the paddy
Rapid drying that fissures the kernels
Rewetting of dried paddy
Excessive whitening pressure
Answer: A
Correct answer: Slow and even drying of the paddy
Head rice yield is the proportion of whole kernels, and most breakage originates before the mill: rapid drying sets up moisture gradients within the kernel that crack it internally, and rewetting a dried kernel does the same in reverse. Slow, even drying avoids those fissures, and a kernel without them survives whitening. Excessive whitening pressure then breaks whatever the drying has already weakened.
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