Dept. of Seed Science and Technology, Tamil Nadu Agricultural University Coimbatore-641 003, India.
Delinted cotton seeds of MCU 12 and Surabi were graded using lab model two screen cleaner cum grader in order to find out optimum sieve size for maximum recovery and seed quality. Decrease in sieve aperture size (4.5 mm) yielded high recovery in both cultivars (94.40 and 94.15%, respectively). Significant differences were observed on physical measurements of seed samples collected during grading in both cultivars. Maximum (82 and 83%) and minimum (72 and 73%) germination percentage were recorded by the seeds retained by 5.5 mm and sinked through 4.5 mm sieve in both cultivars viz., MCU 12 and Surabi, respectively. Among the different sieve sizes, 4.5 mm diameter sieve was suitable for both cultivars to obtain good recovery and seed quality.
