Vol. 11, Issue 3 (2022)

Author(s):
Shivakumar B Bagli, Basave Gowda, SR Doddagoudar, NM Shakuntala, Gururaj Sunkad and MK Meena

Abstract:
An experiment was conducted to standardize the sieve size for seed grading in Sunn hemp during Kharif 2019-20 and 2020-21. The Sunn hemp local variety was processed using S₁ - 1.4 mm (S), S₂ - 1.6 mm (S), S₃ - 1.8 mm (S), S₄ - 2.0 mm (S) and S₅ - 2.2 mm (S) of slotted perforated metal sieves with CRD design. The study revealed that larger sized seeds are obtained from 2.0 mm and 2.2 mm sieves which recorded maximum seed quality parameters. Seed recovery percentage in 1.4 mm sieve was higher than other sieves and also quality of seeds obtained in 2.2 mm sieve was higher than the Minimum Seed Certification Standards. The graded seeds obtained from the sieve 2.0 mm recorded the highest recovery (92.99%), physical purity (98.18%), pure live seed (81.17%), test weight (40.40 g), seed germination (82.68%), total seedling length (25.4 cm), seedling dry weight (19.0 mg), seedling vigour index-I (2101) and seedling vigour index-II (1573) in pooled mean data of both years. Hence, grading of Sunn hemp seeds with 2.0 mm sieve is more effective and economical than 2.2 mm sieve. Using the sieve of 2.0 mm (S), higher seed recovery, germination and physical purity percentage above acceptable limits of Indian Minimum Seed Certification standard (IMSCS) can be obtained.