IMPACT4SOIL OpenAire University of Groningen Research Portal Research@WUR UnpayWall Crossref Microsoft Academic Graph Biology and Fertility of Soils Open Access 2002-08-25 <p>Conversion of arable land (maize) to pasture will affect the soil organic matter (SOM) content. Changes in the SOM content were studied using a size- and density-fractionation method and C-13 analysis. Twenty-six years of maize cropping had resulted in a depletion of carbon stored in the macro-organic fractions (&gt;150 mu m) and an increase in the 250 mu m), light (b.d. 150 mu m) and light (b.d. 150 mu m; b.d. &gt;1.13 g cm(-3)) in the 0- to 20-cm layer was still 40-50% lower than in the continuous pasture plots. Average half-life times calculated from C-13 analyses ranged from 7 years in the light fractions to 56 years in heavy fractions. Fractionation results and C-13 data indicated that mechanical disturbance (plowing) during maize cropping had resulted in vertical displacement of dispersed soil carbon from the 0- to 20-cm layer down to 60-80 cm. Conversion of arable land to pasture, therefore, not only causes a regeneration of the soil carbon content, it also reduces the risk of contaminant transport by dispersed soil carbon.</p> land use change DECOMPOSITION 2. Zero hunger C-13 analyses 04 agricultural and veterinary sciences 15. Life on land maize Maize C-13 NATURAL-ABUNDANCE CULTIVATION pasture 13C analyses VERTISOLS SIZE SYSTEMS Pasture 0401 agriculture, forestry, and fisheries Organic matter Fractionation fractionation Land use change CARBON TURNOVER FRACTIONS organic matter STORAGE Römkens, P.F.A.M., van der Plicht, J., Hassink, J., 1999-01-01 journalpaper <p>Conversion of arable land (maize) to pasture will affect the soil organic matter (SOM) content. Changes in the SOM content were studied using a size- and density-fractionation method and C-13 analysis. Twenty-six years of maize cropping had resulted in a depletion of carbon stored in the macro-organic fractions (&gt;150 mu m) and an increase in the 250 mu m), light (b.d. 150 mu m) and light (b.d. 150 mu m; b.d. &gt;1.13 g cm(-3)) in the 0- to 20-cm layer was still 40-50% lower than in the continuous pasture plots. Average half-life times calculated from C-13 analyses ranged from 7 years in the light fractions to 56 years in heavy fractions. Fractionation results and C-13 data indicated that mechanical disturbance (plowing) during maize cropping had resulted in vertical displacement of dispersed soil carbon from the 0- to 20-cm layer down to 60-80 cm. Conversion of arable land to pasture, therefore, not only causes a regeneration of the soil carbon content, it also reduces the risk of contaminant transport by dispersed soil carbon.</p> Soil Organic Matter Dynamics After The Conversion Of Arable Land To Pasture 10.1007/s003740050494 https://doi.org/10.1007/s003740050494