The effects of sun-drying on milling and the quality of rice (Oryza) in ter
ms of milling yield and percentage of broken grains were investigated. The
rice paddy was threshed before being subjected to two treatments based on w
hether it was parboiled or non-parboiled. Samples of each were then sun-dri
ed on a concrete floor or on a mat and were milled at different levels of m
oisture content. After milling, weights of whole grains and broken grains f
or each sample were determined. The experiment was replicated five times. T
he method of sun-drying and the moisture content of the dried grains before
milling significantly affected the milling yield and the percentage of bro
ken grains. Parboiled rice dried on a concrete floor gave a higher yield pe
rcentage and a lower proportion of broken grains than did grains dried on a
mat. (C) 2000 Elsevier Science Ltd. All rights reserved.