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Spatial and Temporal Variability of Water-Soluble Organic Carbon in a Cropped Field

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  • Liss, Harvey J.
  • Rolston, Dennis E.

Abstract

Little is known about the spatial and temporal variability of water-soluble organic carbon (WSC) within agricultural fields. The purpose of this research was to characterize the distribution, the mean, and the variance of WSC that occurs within a cropped field as a function of space and time. Freezing of soil samples showed no significant change in water-soluble organic carbon compared with that in fresh samples taken from a depth of 0.2 m. Thus, water-soluble organic carbon was extracted from frozen soil samples taken from a 200-point grid established on a 1.2-ha field, a 60-point grid within a 0.4-ha field, and a 55-point transect of a field amended with 45 Mg/ha of manure. The initial sampling was in the fall after the harvest of a sorghum crop.

Suggested Citation

  • Liss, Harvey J. & Rolston, Dennis E., 1989. "Spatial and Temporal Variability of Water-Soluble Organic Carbon in a Cropped Field," Hilgardia, California Agricultural Experiment Station, vol. 57(3).
    • Handle: RePEc:ags:hilgar:381955
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