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5 May 2014 Long-term tillage and crop rotation effects on soil quality, organic carbon, and total nitrogen
Laura L. Van Eerd, Katelyn A. Congreves, Adam Hayes, Anne Verhallen, David C. Hooker
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Abstract

Van Eerd, L. L., Congreves, K. A., Hayes, A., Verhallen, A. and Hooker, D. C. 2014. Long-term tillage and crop rotation effects on soil quality, organic carbon, and total nitrogen. Can. J. Soil Sci. 94: 303-315. Long-term studies allow for quantification of the effects of crop production practices, such as tillage and crop rotation, on soil quality and soil C and N stores. In two experiments at Ridgetown, ON, we evaluated the long-term (11 and 15 yr) effect of tillage system and crop rotation on soil quality via the Cornell Soil Health Assessment (CSHA) at 0-15 cm and soil organic C (SOC) and total N at 5-, 10-, and 20-cm increments to 120 cm depth. The CSHA soil quality score and SOC and total N were higher with no-till (NT) than fall moldboard plough with spring cultivation (conventional tillage, CT) and rotations with winter wheat [soybean-winter wheat (S-W) and soybean-winter wheat-corn (S-W-C)] compared with rotations without winter wheat. In both long-term trials, NT had ca. 21 Mg ha-1 more or 14% higher SOC than CT in the 0- to 100-cm soil profile, a trend which contrasts previous research in eastern Canada. Thus, the two long-term trial results at Ridgetown suggest that to improve soil quality and storage of C and N, growers on clay loam soil in southwestern Ontario should consider adopting NT production practices and including winter wheat in the rotation.

Laura L. Van Eerd, Katelyn A. Congreves, Adam Hayes, Anne Verhallen, and David C. Hooker "Long-term tillage and crop rotation effects on soil quality, organic carbon, and total nitrogen," Canadian Journal of Soil Science 94(3), 303-315, (5 May 2014). https://doi.org/10.1139/CJSS2013-093
Received: 4 October 2013; Accepted: 1 April 2014; Published: 5 May 2014
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KEYWORDS
assolement soja-blé d'hiver-maïs
continuous corn
Cornell Soil Health Assessment
Cornell Soil Health Assessment
labours au versoir/soc
moldboard plow/plough tillage
monoculture du maïs
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