Studies on liming oxisols cropped to coffee, 2: Effect of liming to varying pH levels on the chemical characteristics of soil
Soils of pH 4.2 and 5.6 were treated with calcium carbonate ranging from 0.3 to 10 tonnes/acre to result in varying pH levels and incubated for 3 months with moisture at field capacity. Analysis of the soil samples for different chemical constituents after the incubation period indicated that the varying amounts of calcium carbonate had practically no effect on the organic carbon content, cation exchange capacity and available potassium in the soils studied. Total exchange able bases and exchangeable Ca + Mg were found to increase with increasing amounts of added lime. In the soil of pH 4.2 an initial increase in available phosphorus (Bray 1) was observed; but further addition of CaCO subíndice 3 resulted in significant reduction in available P. In the soil of Ph 5.6 also liming caused lowering of P availability. The study suggests that when the available P level is in the high range no beneficial effect could be expected by liming with regard to P availability
| Main Authors: | , |
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| Format: | biblioteca |
| Published: |
1978
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| Subjects: | SUELO LIMOSO, PH, QUIMICA DEL SUELO, OXISOL, |
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