J. Fan et al., A study of head rice yield reduction of long- and medium-grain rice varieties in relation to various harvest and drying conditions, T ASAE, 43(6), 2000, pp. 1709-1714
In this research, the effects of harvest moisture content (HMC), harvest lo
cation, variety difference, and heated-air drying conditions on head rice y
ield reduction (HRYR) of long-grain (Kaybonnet and Cypress) and medium-grai
n (Bengal) varieties were investigated. The rice was harvested at moisture
contents (MCs) of approximately 16 to 26% from two locations (Stuttgart and
Keiser Arkansas), The rough rice was dried under three conditions: 43.5 de
greesC, 38% relative humidity (RH), 9.5% equilibrium moisture content (EMC)
; 51.7 degreesC, 25% RH, 7.3% EMC; and 60 degreesC, 17% RH, 5.8% EMC. The r
esults indicated that variety HMC, drying condition, and drying duration ha
d significant interactive effects on the HRYR during drying, Medium-grain B
engal rice exhibited more HRYR than did long-grain Cypress or Kaybonnet ric
e under a given drying condition. The results further indicated that a decr
ease in MC of rice at the early drying stages did not substantially affect
the HRY until a certain MC level was reached It appeared in this study that
the amount of moisture that could be removed without affecting HRY increas
ed as harvest MC increased.