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With limited phosphorus (P) supplies, increasing P demand, and issues with P runoff and pollution, developing an ability to reuse the large amounts of residual P stored in agricultural soils is increasingly important. In this study, we investigated the potential for residual soil P to maintain crop yields while reducing P applications and losses in Canada. Using a P cycling model coupled with a soil P dynamics model, we analyzed soil P dynamics over 110 years across Canada's provinces. We found that using soil residual P may reduce mineral P demand as large as 132 Gg P year−1 (29%) in Canada, with the highest potential for reducing P applications in the Atlantic provinces, Quebec, Ontario, and British Columbia. Using residual soil P would result in a 21% increase in Canada's cropland P use efficiency. We expected that the Atlantic provinces and Quebec would have the greatest runoff P loss reduction with use of residual soil P, with the average P loss rate decreasing from 4.24 and 1.69 kg ha−1 to 3.45 and 1.38 kg ha−1, respectively. Ontario, Manitoba, and British Columbia would experience relatively lower reductions in P loss through use of residual soil P, with the average runoff P loss rate decreasing from 0.44, 0.36, and 4.33 kg ha−1 to 0.19, 0.26, and 4.14 kg ha−1, respectively. Our study highlights the importance of considering residual soil P as a valuable resource and its potential for reducing P pollution. [ABSTRACT FROM AUTHOR]

Globally, the mix of private- and public-sector involvement in health care delivery is a focus of political concern. This concern in Canada takes place within the parameters of the federal Canada Health Act. Private for-profit activities in the health care sector in Canadian provinces have moderately shrunk the definition of ‘necessary medical and hospital services’ that must be provided by the public administration system under the federal Canada Health Act. In this article, we argue that the development of new technologies, pharmaceutical innovations, competing (non-health) demands on the federal dollar, and an aging population together create an environment where pressures for economic and political sustainability have led to some erosion of necessary health services in the provinces. Such pressures have, in turn, led to the growth of private commercial-sector health services. Within Canada’s federal system, provincial negotiation of the role of commercial health care organizations has developed in different ways in Ontario and Quebec. Such subnational developments are a significant focus for comparative health policy analysis. [ABSTRACT FROM PUBLISHER]

Focuses on the difference in tuition fees between Ontario and Quebec in 2003/04. Standard fee at medical schools in Quebec; Reason for low tuition fees in Quebec.