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ARS Home » Research » Publications at this Location » Publication #102927
Title: TOTAL ORGANIC CARBON LOSSES VIA LYSIMETER PERCOLATE AND NATURAL SPRINGS

Author
item Owens, Lloyd
item STARR, G - THE OHIO STATE UNIV.
item Lightell, Donald

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 11/1/1999
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Total Organic Carbon (TOC) has been determined monthly in the percolate from large lysimeters (2.4 m deep) containing undisturbed soils. Each of these lysimeters was in a corn/soybean (Zea mays L./Glycine max L.) rotation with a chisel-plow tillage treatment. Although there is some variability in the TOC concentrations in the percolate, most of the TOC values were in a range of 0.5 to 6.0 mg/L with the corn/soybean rotation. Developed springs in two rotational grazing systems were sampled for 10 years. The forage in one system was fertilized orchardgrass (Dactylis glomerata L.). The other system had legumes, principally alfalfa (Medicago sativa L.), mixed with orchardgrass. TOC concentrations in the groundwater collected at the spring developments had less variability than in the lysimeter percolate. Most TOC values from these pasture systems were in a concentration range of 1 to 3 mg/L.