Pachypodium Habitats - Soil Chemistry - Soil PH

Soil PH

Rapanarivo et al. measured the pH levels for the soil in half the sites of Pachypodium endemic to Madagascar. The pH ranges approximately from 3.5 to 7. Strictly acid soils that had a pH level of 3.5 to 5 were preferred by Pachypodium brevicaule, P. cactiples, P. densiflorum, P.eburneum, and P. rosulatum. The next level, acid to basic soils, with a pH between 4.5 and 7 were suitable for P. lamerei and P. rutenbergianum. On soils with a neutral pH level of 7, P. meridionale inhabit. P. sofiense grows on calcareous soils but also in acid soils with a pH level of 4. P. lealii grows on outcrops of granite in fairly fertile, acid soil.

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