National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The intervention of engineering properties of the seeds has an important role in design of pneumatic seeder for seeding in plug trays. The present study was carried out to find different physical properties like seed size (length and width), shape, thousand seed weight, bulk density and terminal velocity (aerodynamic property) of cabbage (Brassica oleracea) and tomato (Lycopersicon esculentum) seeds at moisture content of 8.24%(wb) and 9.71%(wb), respectively. The size of the seeds was measured by analysing with ‘Adobe Photoshop CS4’ package by acquiring the digital images with a flatbed scanner. The shape of seeds was expressed in terms of roundness by calculating number of pixels covered by digital image of seed area having 300 dpi. The terminal velocity of five randomly selected samples were studied in terminal velocity apparatus (attached with vane probe anemometer) to find the minimum-negative pressure to identify vacuum requirement in seed suction tube. The average length and width of cabbage was found to be 2.03 ± 0.06 and 1.78 ± 0.05 mm whereas, the tomato seeds of 3.97 ± 0.10 mm length and 2.96 ± 0.07 mm of width were noticed in the study for deciding needle diameter of suction tube. The roundness factor was found to be 0.85 ± 0.03 and 0.64 ± 0.02 for cabbage and tomato seeds, respectively. The thousand seed weights of cabbage and tomato seeds were 3.40 ± 0.05 g and 2.63 ± 0.04 g, respectively. The bulk density of 0.73 g/cc and terminal velocity of 7.28 ± 0.04 m/s were observed for cabbage seeds, similarly they were 0.30 g/cc and 2.67 ± 0.06 m/s for tomato seeds, respectively. All engineering properties of both type of seeds found significantly different, when compared with each other. The length of both type of seeds have positive correlation with width and negative correlation with height. There was no correlation among the other properties. The significant difference was obtained among the properties, while correlation of length of seeds was found with their width and roundness only.
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