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Long-term tillage and crop rotation effects on soil quality, organic carbon, and total nitrogen

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Title: Long-term tillage and crop rotation effects on soil quality, organic carbon, and total nitrogen
Author: Van Eerd, L.L.; Congreves, K.A.; Hayes, A.; Verhallen, A.; Hooker, D.C.
Abstract: 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.
URI: https://hdl.handle.net/10214/21249
Date: 2014
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Related Publications: Van Eerd, L., Congreves, K., Verhallen, A., Hayes, A., & Hooker, D. (2014). Long-term tillage and crop rotation effects on soil quality, organic carbon, and total nitrogen. Canadian Journal of Soil Science, 140505045536003–. https://doi.org/10.4141/CJSS-2013-093


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