Studies on liming oxisol cropped to coffee, 3: Evaluation of liming materials and rock phosphates of different particle size at varying soil moisture regimes
A laboratory incubation study was conducted for a period of 6 months to find out the efficacy of a few liming materials and rock phosphate of different particle size at varying soil moisture levels to raise the pH of a soil grown to coffee to 6.5. The materials tested were burnt lime, limestone, dolomite, basic slag and rock phosphate at soil moisture levels of 0,10,20,30,40 and 60 per cent water holding capacity of the soil. The study indicated that soil moisture played a dominant role in raising the pH, the moisture level of 60 W.H.C. being necessary for complete reaction. Particles which passed through 80 mesh test sieve were found more effective than the coarser ones even at lower moisture levels. It was further observed that most of the lime-soil reaction resulting in the pH change occurred in a week's time. Finely ground rock phosphate also effected a pH change and was found on par with basic slag. The efficacy of the liming materials tested was placed in the order burntlime > limestone > dolomite > basic slag
| Main Authors: | , , |
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| Format: | biblioteca |
| Published: |
1978
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| Subjects: | SUELO LIMOSO, TEXTURA DEL SUELO, ROCA FOSFATADA, HUMEDAD, OXISOL, |
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