scholarly journals Observations on the incidence of herds with non-visible lesioned tuberculin test reactors in south-west England

1987 ◽  
Vol 99 (1) ◽  
pp. 173-178 ◽  
Author(s):  
J. W. Wilesmith ◽  
D. R. Williams
Keyword(s):  
Tuberculin Test ◽  
Eastern Region ◽  
Test Results ◽  
The South ◽  
Relative Risks ◽  
West Region ◽  
South West ◽  
Tuberculin Testing ◽  
Test Reactor ◽  
South West Region

SUMMARYThe herd incidence of confirmed Mycobacterium bovis infection in cattle in the south-west of England has been approximately ten times that of the remainder of England and Wales; this greater incidence has been attributed to infection from badgers. The incidence of herds with only non-visible lesioned tuberculin test reactors, from which M. bovis was not isolated, has also remained higherin the south-west region.The incidences of these latter unconfirmed incidents were compared in parishes in the south-west region in which M. bovis in cattle had been confirmed, and those where M. bovis had not been confirmed, for the period 1979–83. This analysis was carried out both for those parishes in which herds had been subjected to annual tuberculin testing and for those subjected to biennial tuberculin testing. The incidence of unconfirmed incidents was significantly higher in parishes in which confirmedincidents had occurred, and this difference was found in both the annual and biennially tested parishes. The relative risks for the incidence of unconfirmed incidents in annually and biennially tested parishes were 1*89 and 2–56, respectively. The incidence of unconfirmed incidents in biennially tested parishes was lower than in annually tested parishes.The incidence of non-specific tuberculin test reactor herds was estimated from tuberculin test results in the eastern region of England during a period when tuberculosis was not confirmed in cattle. A comparison of this incidence and that of unconfirmed incidents in the south-west region suggests that approximately 70% of the unconfirmed incidents in the south-west were related to exposure to M. bovis.The results of the analyses indicate that unconfirmed incidents cannot be completely ignored in epidemiological analyses and studies of bovine tuberculosis in the problem areas of the south-west region of England.

scholarly journals Technical Efficiency Assessment of Dairy Farm in the South-west Region of Bangladesh

2020 ◽  
pp. 21-28
Author(s):  
Fariha Farjana ◽  
Afia Khatun
Keyword(s):  
Technical Efficiency ◽  
Stochastic Frontier ◽  
Percent Level ◽  
Dairy Farms ◽  
Farm Size ◽  
The South ◽  
Average Output ◽  
West Region ◽  
South West ◽  
South West Region

The paper concentrates on the measurement of the total factor productivity of dairy farms in the south-west region of Bangladesh. The study used stochastic frontier approach for analyzing the technical efficiency of the dairy farms. Here, seventy dairy farms are considered as a sample. The data reveals that the number of labor and the quantity of food are statistically significant at a 1 percent level of significance.The data also manifests that numerous farm-specific characteristics, i.e. farm size, farmer’s age, and amount of credit are statistically significant at 1 percent, 10 percent, and 10 percent respectively. The range of technical efficiency for the farms varies from 26 percent (minimum) to 95 percent (maximum) where the mean value is 68 percent for the dairy farms of the south-west region. This implies that an average output of milk production falls 32 percent short of maximum possible level. Hence, there is scope of improvement in this sector. Therefore, to improve the farm productivity government should provide proper training, and medical treatment facilities for the farms so that the animals become healthy. If it is possible to do so then the farm level production frontier will shift upward.

scholarly journals Environmental Adaptability and Rock Dust Concentrations in Lettuce Cultivars

2019 ◽  
Vol 11 (14) ◽  
pp. 306
Author(s):  
L. L. Ferreira ◽  
Carmen Rosa da Silva Curvêlo ◽  
Gileade Costa Leonel Amaral ◽  
Juliana Naves de Campos ◽  
Rodrigo Vieira da Silva ◽  
...  
Keyword(s):  
Experimental Design ◽  
Variance Analysis ◽  
The South ◽  
West Region ◽  
South West ◽  
Experimental Area ◽  
Environmental Adaptability ◽  
South West Region ◽  
Rock Dust

The purpose of this work is to analyze lettuce cultivars different responses to environmental adaptability and rock dust concentrations in agroclimatic conditions in the south-west region of Goiás state. The work was conducted in the county of Mineiros, Goiás. The experimental area soil’s was classified as quartzarenic NEOSOL. In experiment number 1, was used experimental design in random blocks in factorial 5 × 2, corresponding to five rock dust concentrations (0, 100, 200, 300 and 400 kg ha-1), in two lettuce cultivars of Crespa and Americana lettuce. In experiment number 2 was applied experimental design in randomized blocks, which were constituted by 7 lettuce cultivars (Hanson, Simpson S. Preta, Baba de Verão, Maravilha de Inverno, Grandes Lagos, Crespa Palmas, and 4 Estação). The data results were analyzed 45 days after seeds transplant. The results were submitted to variance analysis and Turkey’s regression and test at a 5% probability. The 400 kg ha-1 rock dust dose didn’t have any effects in lettuce cultivars Crespa and Americana, once that, rock dust nutrients mineralization occurs very slowly, not interfering in the lettuce first cycle. 4 Estação cultivar presented good environmental adaptability to Goiás south-west agroclimatic conditions, more specifically in Mineiros, where it is recommended lettuce cultivation in summer-fall.

Sign in / Sign up

Export Citation Format

Share Document