Determination of Shape of Different Varieties of Raw Rice by Projection Method

Abstract

Paddy (orzya sativa L.) is the worlds most important food crop and is primary food source for over
one third of the worlds population. The objectives were to analyse the shape of raw rice varieties in terms of
roundness roundness ratio and sphericity. Jirafull, sarna, komal, sonam, gurmarima, goraknath, ir36,
mansuri, karhani, rambhog, which are the very common varieties of rice found, the shape of the raw rice was
measured using the projection method. Among the selected varieties roundness value of raw rice varies from
0.45-0.71 for raw rice roundness is highest for jirafull and the lower for ir36. The value of roundness ratio of
raw rice varies from 0.034-0.557 for raw rice sphericity is highest for jirafull and lowest for ir36. The value of
sphericity of raw rice varies from 0.31-0.48. This study can be useful for designing of various types of
processing and handling device and equipment for rice.