Philip D Keddie
Biographic Data
| ID | 5245677 |
|---|---|
| NAME | Philip D Keddie |
| GIVEN NAMES | Philip D |
| FAMILY NAME | Keddie |
| SIGNATURE | KEDDIE P D |
| AFFILIATIONS | University of Guelph |
| VERIFIED | No |
| TOTAL WORKS | 8 |
| TOTAL CITATIONS | 23 |
| WORKS AS AUTHOR | 8 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1981 |
| LATEST PUBLICATION YEAR | 1997 |
| H-INDEX | 3 |
Corn Hybrid Selection and Climatic Variability
Farmer adaptation to climatic variability is explored via an analysis of corn hybrid selection in southern Ontario. Corn hybrid varieties are available for a wide range of conditions, including accumulated heat, measured as Corn Heat Units (chus). Hybrids with higher chu ratings generally have higher yields, so long as there is sufficient heat for them to mature. Farmers choose their hybrid varieties prior to the growing season, in the face of un…
Identification of marginal agricultural areas in Ontario, Canada
The Turnaround of the Turnaround? Rural Population Change in Canada, 1976 to 1986
This article represents an extension of an earlier paper on the rural population turnaround in Canada. It provides an updated analysis of rural growth rates for(1) two periods, 1976–81 and 1981–86, (2) provincially based regions, and (3) area types based on proximity to urban centres. Unlike the earlier study, it also provides a comprehensive comparison of rural‐versus‐urban rates of population change in a regional and area type framework and int…
Reclassification and Rural‐versus‐urban Population Change in Canada, 1976–1981
The problem of changing definitions of rural and urban populations is examined using official data for Canada. Two counts of rural and urban populations for 1976 are available. One uses 1976 areas and definitions, and the other applies 1981 parameters to the 1976 data. "The purpose of this article is to establish in some detail both the nature and sources of the differences in rates of rural-versus-urban growth between the two data sets available…
Unravelling the Population Turnaround in Rural Canada
This paper attempts to unravel the rural population turnaround in Canada through a disaggregation and analysis of rural growth rates by (1) two decades, 1961–71 and 1971–81, (2) the farm and non‐farm components of rural population, (3) provincially based regions, and (4) area types based on proximity to urban centres. Following a discussion of the various definitional and boundary‐matching issues arising from the use of the Census of Canada, resu…
The ‘Diffusion’ of Grain Corn Production Through Southern Ontario, 1971‐81
The Renewed Viability of Grain Corn Production in Southern Ontario, 1961–1971, and Changes in Harvesting and Storage Methods
The decade 1961–1971 was one of remarkable expansion in grain corn production across southern Ontario, most notably reflected by the increase in the average scale of production. The complex of factors related to the renewed viability of the crop is discussed, with particular attention to developments in harvesting and storage methods. This serves to illustrate the process by which new developments in harvesting and storage methods were adopted an…
The Diffusion of Grain Corn Production Through Southern Ontario, 1946–1971
The diffusion of grain corn production is described and its spatial form considered in light of innovation diffusion theory. A model is developed to examine the covariance of changes in rate of adoption and selected independent variables representing spatial and aspatial hypotheses. The results suggest that the structure of this diffusion process changes over time. Up to 1956, the process conforms at least in part to the geographer's conceptualiz…
Unravelling the Population Turnaround in Rural Canada
This paper attempts to unravel the rural population turnaround in Canada through a disaggregation and analysis of rural growth rates by (1) two decades, 1961–71 and 1971–81, (2) the farm and non‐farm components of rural population, (3) provincially based regions, and (4) area types based on proximity to urban centres. Following a discussion of the various definitional and boundary‐matching issues arising from the use of the Census of Canada, resu…
The Turnaround of the Turnaround? Rural Population Change in Canada, 1976 to 1986
This article represents an extension of an earlier paper on the rural population turnaround in Canada. It provides an updated analysis of rural growth rates for(1) two periods, 1976–81 and 1981–86, (2) provincially based regions, and (3) area types based on proximity to urban centres. Unlike the earlier study, it also provides a comprehensive comparison of rural‐versus‐urban rates of population change in a regional and area type framework and int…
Reclassification and Rural‐versus‐urban Population Change in Canada, 1976–1981
The problem of changing definitions of rural and urban populations is examined using official data for Canada. Two counts of rural and urban populations for 1976 are available. One uses 1976 areas and definitions, and the other applies 1981 parameters to the 1976 data. "The purpose of this article is to establish in some detail both the nature and sources of the differences in rates of rural-versus-urban growth between the two data sets available…
The Diffusion of Grain Corn Production Through Southern Ontario, 1946–1971
The diffusion of grain corn production is described and its spatial form considered in light of innovation diffusion theory. A model is developed to examine the covariance of changes in rate of adoption and selected independent variables representing spatial and aspatial hypotheses. The results suggest that the structure of this diffusion process changes over time. Up to 1956, the process conforms at least in part to the geographer's conceptualiz…
Corn Hybrid Selection and Climatic Variability
Farmer adaptation to climatic variability is explored via an analysis of corn hybrid selection in southern Ontario. Corn hybrid varieties are available for a wide range of conditions, including accumulated heat, measured as Corn Heat Units (chus). Hybrids with higher chu ratings generally have higher yields, so long as there is sufficient heat for them to mature. Farmers choose their hybrid varieties prior to the growing season, in the face of un…
Identification of marginal agricultural areas in Ontario, Canada
The ‘Diffusion’ of Grain Corn Production Through Southern Ontario, 1971‐81
The Renewed Viability of Grain Corn Production in Southern Ontario, 1961–1971, and Changes in Harvesting and Storage Methods
The decade 1961–1971 was one of remarkable expansion in grain corn production across southern Ontario, most notably reflected by the increase in the average scale of production. The complex of factors related to the renewed viability of the crop is discussed, with particular attention to developments in harvesting and storage methods. This serves to illustrate the process by which new developments in harvesting and storage methods were adopted an…
The Diffusion of Grain Corn Production Through Southern Ontario, 1946–1971
The diffusion of grain corn production is described and its spatial form considered in light of innovation diffusion theory. A model is developed to examine the covariance of changes in rate of adoption and selected independent variables representing spatial and aspatial hypotheses. The results suggest that the structure of this diffusion process changes over time. Up to 1956, the process conforms at least in part to the geographer's conceptualiz…
The Renewed Viability of Grain Corn Production in Southern Ontario, 1961–1971, and Changes in Harvesting and Storage Methods
The decade 1961–1971 was one of remarkable expansion in grain corn production across southern Ontario, most notably reflected by the increase in the average scale of production. The complex of factors related to the renewed viability of the crop is discussed, with particular attention to developments in harvesting and storage methods. This serves to illustrate the process by which new developments in harvesting and storage methods were adopted an…
The ‘Diffusion’ of Grain Corn Production Through Southern Ontario, 1971‐81
Unravelling the Population Turnaround in Rural Canada
This paper attempts to unravel the rural population turnaround in Canada through a disaggregation and analysis of rural growth rates by (1) two decades, 1961–71 and 1971–81, (2) the farm and non‐farm components of rural population, (3) provincially based regions, and (4) area types based on proximity to urban centres. Following a discussion of the various definitional and boundary‐matching issues arising from the use of the Census of Canada, resu…
Identification of marginal agricultural areas in Ontario, Canada
The Turnaround of the Turnaround? Rural Population Change in Canada, 1976 to 1986
This article represents an extension of an earlier paper on the rural population turnaround in Canada. It provides an updated analysis of rural growth rates for(1) two periods, 1976–81 and 1981–86, (2) provincially based regions, and (3) area types based on proximity to urban centres. Unlike the earlier study, it also provides a comprehensive comparison of rural‐versus‐urban rates of population change in a regional and area type framework and int…
Reclassification and Rural‐versus‐urban Population Change in Canada, 1976–1981
The problem of changing definitions of rural and urban populations is examined using official data for Canada. Two counts of rural and urban populations for 1976 are available. One uses 1976 areas and definitions, and the other applies 1981 parameters to the 1976 data. "The purpose of this article is to establish in some detail both the nature and sources of the differences in rates of rural-versus-urban growth between the two data sets available…
Corn Hybrid Selection and Climatic Variability
Farmer adaptation to climatic variability is explored via an analysis of corn hybrid selection in southern Ontario. Corn hybrid varieties are available for a wide range of conditions, including accumulated heat, measured as Corn Heat Units (chus). Hybrids with higher chu ratings generally have higher yields, so long as there is sufficient heat for them to mature. Farmers choose their hybrid varieties prior to the growing season, in the face of un…
Geography (7 works) · Rural development and sustainability (5 works) · Economics (4 works) · Agricultural Economics and Policy (3 works) · Demography (3 works) · Humanities (3 works) · Population (3 works) · Rural population (3 works) · Agroforestry and silvopastoral systems (2 works) · Art (2 works)