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1 July 2011 Évaluation á moyen terme des besoins en engrais minéraux (N, P, K) d'une rotation en grandes cultures sur sol argileux
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Abstract

Tremblay, G. J., Boisvert, J., Fréchette, G. É., Saulnier, M., Alexandre, R. and Vanasse, A. 2011. Mid term evaluation of mineral fertilizer requirements (N, P, K) of a field crop rotation on a clay soil. Can. J. Soil Sci. 91: 637-646. In Quebec, the recommended fertilizer requirements have been lowered since 1994. A study was undertaken from 1998 to 2005 in a 4-yr rotation of wheat (Triticum aestivum L.), soybean [Glycine max (L.) Merr.] and grain corn (Zea mays L.) to verify the mid-term mineral fertilizer requirements (N, P, K) for these field crops. Four levels of nitrogen (N) and three levels of phosphorus (P) and potassium (K) were compared on a clay soil of the Saint-Lawrence Lowlands. Nitrogen requirements based on this study corresponded to the recommended levels of each field crop tested. Recommended phosphorus rates did not maintain initial PM-III soil level (1998). However, crop yields were not affected by this decrease in soil PM-III level. To improve fertilizer recommendation tables, it should be relevant to determine with more accuracy the critical phosphorus and potassium values for field crops on other typical Quebec soils.

G. J. Tremblay, J. Boisvert, G. É. Fréchette, M. Saulnier, R. Alexandre, and A. Vanasse "Évaluation á moyen terme des besoins en engrais minéraux (N, P, K) d'une rotation en grandes cultures sur sol argileux," Canadian Journal of Soil Science 91(4), 637-646, (1 July 2011). https://doi.org/10.1139/CJSS10013
Received: 21 January 2010; Accepted: 1 March 2011; Published: 1 July 2011
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