STANDARDISATION OF SUITABLE SIEVE SIZE FOR SEED GRADING IN DHAINCHA (SESBANIA ACULEATA)K.K. RAGHURAMAN, T. RAMANADANE AND S. ARUNKUMARAbstract Studies were conducted in the Seed Technology Unit of Department of Plant Breeding and Genetics, PAJANCOA & RI,to standardise the suitable sieve size for seed grading in Dhaincha. The seeds sieved through BSS 8 (2.00 mm) registered the maximum seed recovery (88.6%) along with superior seed quality in terms of both physical and physiological seed quality attributes studied. The seeds obtained from BSS 8 had maximum 100 seed weight (2.047g), physical purity (98%), seed germination (92%), seedling vigour in terms of seedling length, vigour indices I (2240) and II (13.00) as well as speed of germination (31.83) as compared to BSS 9 and BSS 10 sieves. The superiority was also found in field emergence (76%) as well as pure live seeds (90.81%). Hence, the sieve size of BSS 8 is suitable for grading of dhaincha seeds. The superiority of BSS 8 sieve (2.00 mm) was observed in both physical and physiological parameters studied including field emergence as well as pure live seeds. A sieve size of 2.00 mm (BSS 8) can be considered as optimum; hence, it ensures that seed quality parameters are within acceptable limits of seed standards for processing dhaincha seeds. |