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Oxidation Potentials of Soil Organic Matter in Histosols under Different Tillage Methods

D. R. Morris*,a, R. A. Gilbertb, D. C. Reicoskyc and R. W. Geschc

a USDA-ARS, Sugarcane Field Station, 12990 U.S. Hwy. 441, Canal Point, FL 33438
b Everglades Research and Education Center, Univ. of Florida, 3200 East Palm Beach Road, Belle Glade, FL 33430
c USDA-ARS, North Central Soil Conservation Research Laboratory, 803 Iowa Ave., Morris, MN 56267



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  		Fig. 1. Rainfall and air temperature (0800 h) after tillage of bare fallow field. The arrows indicate days of soil sampling.

 


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  		Fig. 2. Soil organic matter oxidation potential (A) and respiration (B) due to tillage treatment across time in fallow and residue fields.

 


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  		Fig. 3. Soil extractable C (A) and N (B) due to tillage treatment across time in fallow and residue fields.

 


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  		Fig. 4. Soil microbial biomass C (A) and N (B) due to tillage treatment across time in fallow and residue fields.

 


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  		Fig. 5. Soil temperature (A) and water content (B) due to tillage treatment across time in fallow and residue fields.

 


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  		Fig. 6. Soil pH (A), extractable P (B), and extractable K (C) due to tillage treatment across time in fallow and residue fields.

 




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