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Effects of Biological Nitrogen Reactions on Soil Lime Requirement Determined by Incubation

^a Kuo Testing Labs, Inc., 337 S. 1st Ave., Othello, WA 99344
^b Agricultural and Environmental Services Labs, 2400 College Station Rd., Univ. of Georgia, Athens, GA 30602
^c Dep. of Crop and Soil Sciences, 3111 Plant Sciences, Univ. of Georgia, Athens, GA 30602

View larger version (7K): [in this window] [in a new window]   Fig. 1. Difference in pH in water between soil incubated with Ca(OH)2 and soil incubated with CaCO3 vs. time of incubation.

View larger version (9K): [in this window] [in a new window]   Fig. 2. Difference in pH in water between the 3-d Ca(OH)2 and 60-d CaCO3 incubations vs. net H+.

View larger version (8K): [in this window] [in a new window]   Fig. 3. Effects of initial electrical conductivity on pH depression by 0.01 mol L–1 CaCl2.

View larger version (9K): [in this window] [in a new window]   Fig. 4. Difference between in pH in water and pH in 0.01 mol L–1 CaCl2 vs. electrical conductivity.

View larger version (10K): [in this window] [in a new window]   Fig. 5. Difference in pH in water between the 3-d Ca(OH)2 and 60-d CaCO3 incubations vs. electrical conductivity after the 60-d CaCO3 incubation.