|Douglas Jr, Clyde|
Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 6/10/1997
Publication Date: N/A
Technical Abstract: There is a need to understand soil carbon changes as a result of different tillage practices in crop management systems. Carbon dioxide loss from a Typic Haploxeroll soil was evaluated for three different tillage systems, no-till, chisel, and moldboard plow, after a crop of winter wheat (Triticum aestiavum L.). Carbon dioxide flux was measured using a plexiglas chamber and a Carbon dioxide analyzer. Air permeability, soil moisture, and soil and air temperature were also measured at each sample date. Cumulative Carbon dioxide flux in 111 d averaged 2300, 2600, and 3600 kg/ha for no-till, chisel, and moldboard plow, respectively. The large cumulative Carbon dioxide flux from the moldboard plow treatment appeared to be from decomposition of wheat residue following incorporation into the soil.