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Additional resources for Managing Agricultural Greenhouse Gases
S. , 2006). Venterea et al. (2006) quantified SOC content in a cornesoybean rotation after 10e15 years of CT (moldboard plow and chisel plow in alternate years), continuous NT, and biennial tillage (chisel plow before soybean only) in Minnesota. The CT treatment had lower SOC content (0e30 cm) than NT and biennial tillage treatments. However, there was no significant difference in SOC between CT and NT to a depth of 60 cm. Omonode et al. (2006) studied the effects of several tillage treatments, including long-term (24 years) NT, short-term (7 years) NT after 14 years of moldboard plow, long-term (24 years) chisel plow, and intermittent chisel plow after 14 years of moldboard plow, in continuous corn and cornesoybean rotations for a prairie-derived soil in Indiana.
Estimation of soil strength properties for critical rooting conditions. Soil Tillage Res. 9, 377e386. , 2001. Effect of penetration resistance and timing of rain on grain yield of narrow-row corn in a coastal plain loamy sand. Soil Tillage Res. 63, 15e24. , 2010. Soil and water conservation in the southeastern United States: a look at conservation practices past, present and future. F. ), Soil and water conservation in the United States. Soil Sci. Soc. Am. Spec. Pub. 60, Madison, WI, pp. 183e200.
Aestivum). S. Agroecosystems three field sites in Illinois, Coulter et al. (2009) reported greater surface SOC content (0e30 cm) for continuous corn than for cornesoybean at the Dekalb research site, but not at the Urbana or Dixon Springs sites. In many studies, changes in SOC with time have not been presented. Only a few studies have reported explicit temporal changes. Varvel and Wilhelm (2008) reported a non-significant increase in SOC content (0e30 cm) during 14 years of continuous corn and no trend for cornesoybean near Shelton, NE.