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. 2015. SHORT COMMUNICATION: Field study of air ammonia concentrations in Ontario dairy calf housing microenvironments. Can. J. Anim. Sci. 95: 539Á542. The objective of this study was to measure the ammonia concentrations in the microenvironment of the calf housing area on a sample of commercial dairies in Ontario under typical management conditions. Two approaches were used to measure ammonia concentrations: (1) weekly on four farms for a period of 8 wk and (2) one-time samples were taken from the calf areas on 15 other farms. The results indicated that ammonia levels are managed below the existing maximum threshold provided in the national dairy code of practice.

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The Ontario Ministry of Culture and the Management Group of Knowledge Ontario have announced that negotiations have been successfully completed to supply all publicly funded libraries in the Province of Ontario with a core suite of digital products. The resources contained in these databases will provide access to information that is needed everyday by individual Ontarians and students of all ages. The resources and materials go well beyond what is currently available on the internet, offering full text of newspapers, magazines and books. Access to these databases will be available from wherever people are in Ontario; at home, work, or school. The variety of information to be found in the databases will satisfy the youngest school child, the researcher in a university lab; in fact any citizen of Ontario.

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