@article{Abruña_Vicente_1955, title={Refinement of a Quantitative Method for Determining the Lime Requirements of Soils}, volume={39}, url={https://revistas.upr.edu/index.php/jaupr/article/view/12697}, DOI={10.46429/jaupr.v39i1.12697}, abstractNote={In determining the lime requirement of kaolinitic soils by direct titration with a calcium hydroxide solution it was found that boiling for 5 minutes reduced the time required for the attainment of equilibrium between the soil and the solution from over 100 hours to 1 hour. The variation in the pH values of the sons at equilibrium with the two methods were in all cases less than 0.1 unit. A precise, rapid laboratory method based on 5-minute boiling is described for determining the lime requirement of these soils. Results of a field experiment are shown to demonstrate the accuracy of the method.}, number={1}, journal={The Journal of Agriculture of the University of Puerto Rico}, author={Abruña, Fernando and Vicente, José}, year={1955}, month={Jan.}, pages={41–45} }