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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
81

Drainage investigation of depressional areas in the St. Lawrence lowlands

Sylvestre, Gilbert J. January 1992 (has links)
Four ponded depressional areas were selected in a cultivated field near Ste-Agnes de Dundee, Quebec. In 1988, land, soil, water and crop parameters were measured under ponding and non-ponding conditions in order to formalate a drainage investigation procedure for ponded depressions. / A sweet corn yield reduction of 39% was measured in depressions compared to ridges; this yield reduction occurred with 3 to 5 year interval of recurrence rainfalls. Loss of yield in depressional areas gave an overall reduction of 5% for the whole field. There was an additional loss in quality from poor uniformity of the corn cobs. The Ste-Agnes corn yield was estimated at 20% of the regional average. There was no significant difference between soil characteristics in depressions and ridges except for hydraulic characteristics such as infiltration and percolation rates as determined with the infiltrometer, and hydraulic conductivity as determined with the auger hole method. / The ponding runoff coefficients (mean PRC = 0.11) measured during the summer of 1988 were similar to the ones (mean PRC = 0.13) calculated using the CN curve method (USDA, SCS). / The low percolation rate of the subplow layer was found to be the main constraint to the subsurface drainage of the ponded depressions. / Soil survey and ponding study results were used to formulate a drainage investigation procedure for ponded depressional areas in the St. Lawrence Lowlands.
82

Subsurface irrigation of soybean

Galganov, Yvonne T. (Yvonne Tamara) January 1991 (has links)
A field experiment was conducted on a homogeneous sandy soil and a layered soil of southern Quebec from 1988 to 1990. This was done in order to evaluate the yield response of indeterminate soybean to subsurface irrigation and to determine the performance of subsurface irrigation in a layered soil. It was found that indeterminate soybean varieties increase their yield by approximately 30% for two out of three years. Soybean are very sensitive to competition between themselves as well as with weeds. This sensitivity is increased during subsurface irrigation. Weeds were more prominent in the irrigated area. It was concluded that the soybean yields are functions of water table depth, percent weed and plant population density. The minimum allowable water table depth for soybean was found to be 45 cm. At a water table depth greater than 95 cm no yield response was observed. / Water table management is not only possible but very functional in the layered soils of southern Quebec. It was found that surplus water did not drain from the irrigated area until the water table anywhere in this area was 10 cm higher than the elevation of the overflow pipe in the control chamber. It was therefore concluded that a water table depth range of 10 cm should be included in the design of the water table control system to allow for the effects of rain.
83

Petrogenetic and economic significance of the whole-rock chemistry of ultramafic cumulates in the Cape Smith foldbelt, northern Quebec

Clark, David, 1979- January 2008 (has links)
The ultramafic cumulate rocks of the Raglan horizon in the Proterozoic Cape Smith fold belt of northern Quebec have a common parental liquid in equilibrium with olivine of Fo89 composition. Cumulate olivines have experienced a trapped liquid shift to lower forsterite composition proportionally to the fraction of trapped liquid in the cumulate. Anomalously low nickel contents in analyses of both olivine and whole-rock chemistries are observed only in cumulates with the most modal olivine and which are proximal to known Ni-Cu-(PGE) deposits. The calculated compositions of the trapped liquid fraction indicate that most of the Raglan cumulates formed from Fe-rich high-MgO basalts, which are restricted to the base of the Chukotat volcanic stratigraphy. We propose that a lower degree of adiabatic partial melting of a mantle source accounts for the Fe-rich nature of these parental liquids and may provide an explanation for the presence of numerous Ni-Cu-(PGE) deposits in the sills of the Raglan horizon.
84

Le nationalisme et le radicalisme du journal La Patrie, 1879- 1897.

Laurin, L.-Luc. January 1973 (has links)
No description available.
85

Influence of a row cover and covering duration on growth and development of early mini carrot and crisphead lettuce in southern Quebec

Jenni, Sylvie January 1989 (has links)
No description available.
86

The Québec Education Program in praxis : an investigation of the philosophical and practical elements of the curriculum reform in Québec

Saltarelli, Nancy. January 2007 (has links)
The recently reformed Quebec Education Program has been implemented since the fall of 2000 and has drawn our attention to many questions regarding the philosophical and practical elements of education in Quebec. This thesis critically examines the implementation of this reform. It investigates the philosophical underpinnings of this new program, its approaches and implementation objectives. It provides an overview of the design of this new program and outlines some of the dominant themes emerging from its approach. It critiques the implementation of this reform by presenting some of the factors that make it difficult to effectively sustain change in school. Finally, it will conclude that we need an education that encompasses the authenticity of teaching and learning and which creates an atmosphere that will actively engage students in their learning.
87

Evaluation of the petroleum potential of the Trenton Group, St. Lawrence Lowlands, Quebec.

Currie, Lester John Edgar. January 1968 (has links)
No description available.
88

Vision et agir linguistiques chez des jeunes non-francophones du Québec

Corbeil, Jean-Pierre, 1961- January 1992 (has links)
The role of ethnic minorities in present day Quebec is clearly one of the important topics which many researchers and social players of diverse political and cultural allegiances have addressed and still continue to address. The study which follows, attempts to show the importance which is given to French by certain non-francophone youths attending French schools and colleges in the regions of Montreal and Hull. The analysis of socio-linguistic attitudes and behaviours of these youths, as well as their vision of the future with respect to the French or English reality is especially needed, as school aged youth are the ones who will soon become important actors in a Quebec which is becoming more and more multicultural. This kind of analysis is also important because it allows for a better understanding of the causal factors underlying these attitudes and behaviours. It is therefore the achievement of these objectives with which the following study is concerned.
89

Trickle fertigation of bell peppers in Southern Quebec

Rigby, Marion January 1988 (has links)
No description available.
90

Petrology and tectonic implications of the hellancourt volcanics, Northern Labrador Trough, Quebec

Boone, Erica Rechnitzer January 1987 (has links)
No description available.

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