Settlement and Agricultural Development of the North-West Provinces of Canada

AbstractThis article investigates the anti-tsetse fly work of colonial entomologist K. R. S. Morris in the Northern Territories of the Gold Coast between 1928 and 1951. Morris's main programme was directed at the Lawra District of the north-west, where he claimed to have eliminated the tsetse population and trypanosomiasis by the end of his tenure. This achievement allowed farmers to move into the formerly infested land and reclaim the area for agricultural development. As an added benefit, Morris also claimed, eliminating tsetse flies in the Lawra District reduced the incidence of sleeping sickness in the main market towns of north-west Ashanti. The article charts Morris's work, which is historically significant for a number of reasons. First, it reveals much about the connection between anti-tsetse work and colonial development doctrine in northern Ghana. Second, it highlights the importance of studying colonial practices. Morris's clearing programme appears to have worked, but it was almost certainly based on faulty theories of tsetse ecology. In this sense, the story of anti-tsetse work in the Northern Territories shows that we might learn as much from colonial practices as from colonial ideologies.

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Research on Potential Evaluation and Sustainable Development of Rural Biomass Energy in Gansu Province of China

Sustainability ◽

10.3390/su10103800 ◽

2018 ◽

Vol 10 (10) ◽

pp. 3800 ◽

Cited By ~ 3

Author(s):

Sheng Zhong ◽

Shuwen Niu ◽

Yipeng Wang

Keyword(s):

Renewable Energy ◽

Agricultural Development ◽

Biogas Production ◽

Energy Development ◽

Gansu Province ◽

Biomass Energy ◽

Energy Resources ◽

Development Potential ◽

North West ◽

The North

The development and utilization of renewable energy is an important way to solve the environmental dilemma. Biomass energy is a kind of renewable energy and one of the most widely distributed and easily accessible energy forms. It has currently become a main direction of renewable energy development. This paper took Gansu Province of China as the research object to calculate its theoretical reserves of biomass energy resources and then evaluate its potential of biomass energy development by using TOPSIS method under different agricultural development and geographical environmental conditions. Spatial autocorrelation analysis was also performed to reveal the spatial distribution and temporal evolution of the potential of biomass energy development in Gansu Province. The results show that: (1) The total reserves of biomass energy resources from agricultural wastes in Gansu Province reach 7.28 × 107 t/year, with equivalent biogas production of about 1.95 × 1010 m3/year. (2) In most counties of Gansu Province, the Ci value is smaller than 0.5000, indicating that the potential of biomass energy development is relatively low in Gansu Province. (3) The spatial agglomeration of biomass energy development potential occurs mainly in the Hexi area, the Gannan area and the Loess Plateau area of East Gansu Province. (4) There is an area with obvious high-low (H-L) agglomeration of biomass energy development potential to the north-west side of the Gannan area with low-low (L-L) agglomeration of biomass energy development potential. It is a key zone to help drive biomass energy development in the Gannan area. (5) The spatial range of positive correlation (high-high and low-low agglomeration) areas shrunk during the evaluation period.

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SEM and TEM observations of sperm development in the testis of the freshwater fish Oreochromis mossambicus

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100157838 ◽

1990 ◽

Vol 48 (3) ◽

pp. 58-59

Author(s):

Daryl A. Cornish ◽

George L. Smit

Keyword(s):

Morphological Characteristics ◽

Oreochromis Mossambicus ◽

Breeding Cycle ◽

Limited Information ◽

North West ◽

The North ◽

Sem And Tem ◽

Sperm Development ◽

Ultrastructural Characteristics ◽

The University

Oreochromis mossambicus is currently receiving much attention as a candidater species for aquaculture programs within Southern Africa. This has stimulated interest in its breeding cycle as well as the morphological characteristics of the gonads. Limited information is available on SEM and TEM observations of the male gonads. It is known that the testis of O. mossambicus is a paired, intra-abdominal structure of the lobular type, although further details of its characteristics are not known. Current investigations have shown that spermatids reach full maturity some two months after the female becomes gravid. Throughout the year, the testes contain spermatids at various stages of development although spermiogenesis appears to be maximal during November when spawning occurs. This paper describes the morphological and ultrastructural characteristics of the testes and spermatids.Specimens of this fish were collected at Syferkuil Dam, 8 km north- west of the University of the North over a twelve month period, sacrificed and the testes excised.

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