INFLUENCE OF LIMING MATERIALS ON pH VALUES OF SIX MARYLAND SOILS

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Abstract
The influence of coarse limestone, medium limestone, fine limestone, burnt lime and hydrated lime on pH values was investigated in a field plot study on 6 important Maryland soils over a 3-yr. period. The pH value of the surface soils was significantly increased by all additions of lime materials, hydrated lime producing the greatest increase. No significant differences in soil pH were shown between the different grades of fineness of limestone when heavy applns. were used. The greatest change in soil pH occurred during the first 2 mos. after treatment. Exptl. data indicate that larger amounts of lime should be recommended for Maryland soils, and a recommendation chart is presented.

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