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Biswas, M. K.
- Application of Statistical Quality Control Technique for Process Control in Welding
Abstract Views :232 |
PDF Views:4
Authors
A. K. Bose
1,
M. K. Biswas
1
Affiliations
1 Mechanical Engg Dept., B E.College, Howrah-3, IN
1 Mechanical Engg Dept., B E.College, Howrah-3, IN
Source
Indian Welding Journal, Vol 26, No 3 (1993), Pagination: 5-10Abstract
Weld quality can be determined by different destructive and non-destructive tests. The tests are required to control the quality by variables as well as by attributes. In this paper, the specimens welded by submerged Arc Welding (SAW) are used for quality control and process control The test data from charpy impact test have been used for quality controls by variables and radiography test results are utilised to control the quality by attributes. For each of the above cases statistical analysis have been made and control lines (using X-R Chart and P-Chart) are drawn to determine whether the SAW process is within control or not The use of SQC technique for control of quality of welds in continous production saves money and time compared to other methods.
- Variability in Parasitic Ability of Trichoderma Isolates against Sclerotia of Sclerotium rolfsii Associated with Chickpea
Abstract Views :257 |
PDF Views:148
Authors
Affiliations
1 Regional Agricultural Research Station, Tirupati - 517 502, Andhra Pradesh, IN
2 NRRI-Central Rainfed Upland Rice Research Station, Hazaribagh, Jarkhand, IN
3 Department of Plant Protection, Palli Siksha Bavana, Viswava Bharati, Bolpur – 731235, West Bengal, IN
1 Regional Agricultural Research Station, Tirupati - 517 502, Andhra Pradesh, IN
2 NRRI-Central Rainfed Upland Rice Research Station, Hazaribagh, Jarkhand, IN
3 Department of Plant Protection, Palli Siksha Bavana, Viswava Bharati, Bolpur – 731235, West Bengal, IN
Source
Journal of Biological Control, Vol 31, No 3 (2017), Pagination: 184-193Abstract
Parasitic ability of Trichoderma isolates was tested against Sclerotium rolfsii in two types of soils viz., natural and sterilized soils to assess the ecological adaptability of Trichoderma spp. to a soil. The isolate ATPU 1 (EID50 of 2.1 mycelia/gm of soil) was most effective in parasitization of sclerotia of S. rolfsii when used as live bait, under the natural soil of, when mycelial form of inoculum was used. This isolate was closely followed by KNO 2 and ATPP 6 which had the same EID50 of 2.2 mycelia/gm of soil, the next best isolates were KNP 3 and ATPPE 6 with EID50 of 2.3 mycelia/gm of soil. The isolate KT 6 (EID50 5.7) was rated as poorest competitive colonizer, requiring comparatively highest inoculum level to colonize 50% sclerotia of S. rolfsii . However the conidial form of inoculum from KNK1 (EID50 value of 2.2 conidia/gm of soil) was most aggressive isolate requiring lowest inoculum dose for 50% colonization of sclerotia of S. rolfsii.Keywords
Chickpea, Competitive Parasitic Ability, Trichoderma spp.Full Text
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