Discussion
Arrange the causal chain by which drying too fast damages rice:
1. The surface dries far faster than the interior
2. A steep moisture gradient develops within the kernel
3. Internal stresses fissure the kernel
4. The kernel breaks during milling and head rice yield falls
Select the correct sequence.
Answer: B
Correct answer: 1, 2, 3, 4
The chain runs from cause to commercial consequence. Drying too hard makes the surface dry far faster than the interior (1); that establishes a steep moisture gradient within the kernel (2).
Because the drier outer layer shrinks against the wetter core, internal stresses build until the kernel fissures (3). The fissures are often invisible in the whole grain, but they are planes of weakness, so the kernel breaks during milling and the head rice yield - the proportion recovered as whole grains, which commands the premium - falls (4). Tempering between passes interrupts the chain at step 2.
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