3.1. Size
The seed diameter and thickness at different moisture contents is shown in Fig. 1. It is observed from Fig. 1 that diameter and thickness of lentil increased linearly with increase in moisture content. For the increase in moisture contents from 10.33% to 21.00% (wet basis), the increase of diameter and thickness were 5.73% and 13.76%, respectively. The seed thickness was lower than that of diameter. Gupta and Das (1997), and Hossain et al. (1998) found similar results for green gram and groundnut kernel, respectively. The following regression equations were developed for diameter and thickness of lentil seed with moisture content (ω%, wet basis).