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Biochemical Properties of Decomposing Cotton and Corn Stem and Root Residues

^a USDA-ARS, Integrated Farming and Natural Resources Research Unit, 2413 E. Hwy 83, Weslaco, TX 78596-8344
^b The Univ. of Texas-Pan American, Biology Dep., 1202 West University Drive, Edinburg, TX 78539

View larger version (27K): [in a new window]   Fig. 1. Soil and air temperatures summarized for the 1-yr field incubation of plant tissues. Bars at the bottom are precipitation.

View larger version (23K): [in a new window]   Fig. 2. Corn and cotton dry matter remaining after field incubation for 1 yr. Bars = S.E.M., n = 4.

View larger version (26K): [in a new window]   Fig. 3. Water extractable organic C (WEC) in plant residues during a 1-yr field incubation. Bars = S.E.M., n = 4.

View larger version (24K): [in a new window]   Fig. 4. Water extractable polyphenolics (WEP) in plant residues during a 1-yr field incubation. Bars = S.E.M., n = 4.

View larger version (22K): [in a new window]   Fig. 5. Alcohol extractable polyphenolics (AEP) in plant residues during a 1-yr field incubation. Bars = S.E.M., n = 4.